Abstracts bookgemmec/IFAE/Abstracts_12102016.pdf · Abstract ID : 34 The PADME experiment at the Frascati beam-test facility Content : In the last few years the long-standing problem

IFAE 2016

Abstracts book

https://agenda.infn.it/conferenceDisplay.py?confId=10129

Table of contents

The PADME experiment at the Frascati beam-test facility 1.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ATLAS ans CMS results about Mono Higgs analyses 2.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Status Report of the GERDA Phase II Startup 3.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

First observation of the rare Lambda_b --> pK-mu+mu- decay and measurement of CP-violating asymmetries 4

Risultati recenti sugli stati XYZ e spettroscopia del charm a BESIII 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Risultati di DAMA/LIBRA e prospettive 6.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Impatto dei decadimenti leptonici del $\tau$ sulla distribuzione $\bar{B}\to D\mu\bar{\nu}$ 7.. . . . . . . . . . . . . . . . . . . . . . .

Ricerca di materia oscura leggera con CRESST-III 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The Frascati LINAC beam test facility performance and upgrades 9.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Actvity of research and development of Low Gain Avalance Detector 11.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Il rivelatore a GEM Cilindriche per l’esperimento BESIII: misura delle prestazioni in campo magnetico e statodel progetto 12.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Searches for a heavy scalar boson H decaying to a pair of 125 GeV Higgs bosons hh or for a heavy pseudoscalar boson A decaying to Zh, in the final states with h-> tau tau in CMS 13.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The Run-2 tracking performances of the CMS detector 14.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SUSY Searches with the CMS detector 15.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SHiP: a new facility with a dedicated detector to search for new long-lived neutral particles and studying tauneutrino properties and nucleon structure functions 16.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The CMS-TOTEM Precision Proton Spectrometer 18.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dark Matter Search at CMS 19.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(Anti-)hypertriton and exotica production in Pb-Pb collisions with ALICE at the LHC 20.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Direct measurement of the 22Ne(p,g)23Na reaction cross section at LUNA 21.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The LHCf experiment: measurements of very forward particles production spectra at LHC 22.. . . . . . . . . . . . . . . . . . . . . . .

Study of Higgs Boson decaying into WW at 13 TeV with CMS detector 24.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Double parton scattering in same sign W pairs 25.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Study of Higgs Boson decaying into WW at 13 TeV with CMS detector 26.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

i

Abstract ID : 34

The PADME experiment at the Frascatibeam-test facility

Content :

In the last few years the long-standing problem of dark matter has been addressed reviving the concept of “dark” or“hidden” sector: new particles are not directly connected with the Standard Model (SM) gauge fields, but only throughmediator fields or ``portals'', connecting our world with new hidden sectors. One of the simplest models just adds anadditional U(1) symmetry, with its corresponding vector boson A'. All SM particles will be neutral under this symmetry,while the new field will couple to the charged particles of the SM with an effective charge epsilon.

Up to now, almost all direct searches have been performed in colliding-beams and fixed target experiments, by producingthe dark photon in the analogous of the Bremsstrahlung process (e(Z) → e(Z) A') or of neutral meson electromagneticdecays (π0,η → γ A’), and then looking at its decay back to SM particles, i.e. to electron-positron or muon pairs.

These experiments provide quite stringent limits but relying on the strong assumption that no particle lighter than the A'exists in the hidden sector. An alternative approach, so far not exploited by any experiment, would be to use the lowercross-section annihilation process (analogous of pair production): e+ e- → γ A'. In such a fixed target experiment,knowing the quadri-momentum of the incoming positron and by measuring the quadri-momentum of the SM photon, onecan search for a non-zero missing mass.

At the end of 2015 INFN has formally approved a new experiment, in the framework of the “What Next” program of newexperimental initiatives for searching new Physics hints. The idea of the PADME experiment is to exploit the FrascatiLINAC and the BTF beam-line for producing a positron beam with well defined and easily tuneable parameters, mainlywith the objective of extending the exclusion – or even better, aiming at the discovery – of a dark photon in a relevantpart of the mass and coupling range interesting for the muon (g-2) problem.

The positron bunches from the BTF will be annihilated on a thin, active, strip-segmented diamond target. The objective isto complete the design and construction of the experiment, based on a BGO crystal calorimeter and on positron vetodetectors in a large gap dipole magnet, by the end of 2017 and to reach a 10^13 electron on target.

Primary authors : VALENTE, Paolo (ROMA1) ; RAGGI, Mauro (LNF)

Co-authors :

Presenter :

Track classification :

Contribution type : --not specified--

Submitted by : VALENTE, Paolo

Submitted on Sunday 17 January 2016

Last modified on : Sunday 17 January 2016

Comments :on behalf of the PADME collaboration, final list of authors to be specified

Status : SUBMITTED

Track judgments :

IFAE 2016 / Abstracts book The PADME experiment at the Frascati beam-test fac...

Page 1 Friday 12 February 2016

Abstract ID : 35

ATLAS ans CMS results about MonoHiggs analyses

Content :

The Dark Matter search is currently one of the most promising investigation field at the Large Hadron Collider at CERN.Even though its existence has been pointed out by several astrophysical observations no direct evidence has been found sofar, due to the fact that it does not interact electromagnetically with the detectors resolving de facto in a missingtransverse energy contribution in the final balance.Many Dark Matter candidates have been proposed in literature within new physics models at the electroweak simmetrybreaking scale. In this context, the discovery of the Higgs boson opened a new window for Dark Matter discovery being areliable tag for it through the Mono-Higgs search, which offers a Higgs + MET final state. In this contribution the latestresults about ATLAS and CMS experiments for Mono Higgs analyses performed using RUN I and RUN II data and using asimplified model with a Z′ gauge boson decaying into a heavy pseudoscalar Higgs (A0) from the two-Higgs-doublet modelwill be presented.

Primary authors : MINIELLO, Giorgia (BA)

Co-authors :

Presenter : MINIELLO, Giorgia (BA)



Submitted by : MINIELLO, Giorgia

Submitted on Wednesday 20 January 2016

Last modified on : Wednesday 20 January 2016

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Status : SUBMITTED

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IFAE 2016 / Abstracts book ATLAS ans CMS results about Mono Higgs analyses


Abstract ID : 36

Status Report of the GERDA Phase IIStartup

Content :

The GERmanium Detector Array (Gerda) experiment, located at the Laboratori Nazionali del Gran Sasso(LNGS) in Italy, searches for 0nbb of Ge-76.In Gerda, germanium diodes enriched to ~86% in the double beta emitter Ge-76 (enrGe) are exposed being bothsource and detectors of 0nbb decay.Neutrinoless double beta decay (0nbb) is considered a powerful probe to address still open issues in the neutrinosector of the (beyond) Standard Model of particle Physics, i.e. the Dirac or Majorana nature of the neutrino, its absolutemass, violation of the lepton conservation rule.Since 2013, just after the completion of the first part of its experimental program (GERDA I), the GERDA setup hasbeenupgraded to perform its next step in 0nbb searches (GERDA II).GERDA II aims to reach a sensitivity to the 0nbb decay half-life larger than 10^26 yr in about three years of physicsdata taking,. This exposing a detector mass of about 40 kg of enrGe in form of detectors with improved energyresolution and pulse shape discrimination capabilities with a background index, of about 10-3 cts/(keV·kg·yr). Withrespect with GERDA I the detector mass has been doubled, a larger fraction having improved pulse shapediscrimination features, while the BI aims to be reduced a factor 10.One of the main new implementations is the liquid argon scintillation light read-out, to veto those events that onlypartially deposit their energy both in Ge and in the surrounding LAr.In this talk the GERDA II expected goals, the upgrade work and selected features from the Phase II commissioningruns will be presented. The main Gerda I achievements will be also reviewed.

Primary authors : D'ANDREA, Valerio (GSSI)

Co-authors :

Presenter : D'ANDREA, Valerio (GSSI)



Submitted by : D'ANDREA, Valerio

Submitted on Tuesday 02 February 2016

Last modified on : Tuesday 02 February 2016

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IFAE 2016 / Abstracts book Status Report of the GERDA Phase II Startup


Abstract ID : 37

First observation of the rare Lambda_b--> pK-mu+mu- decay and

measurement of CP-violatingasymmetries

Content :

The baryonic Lambda_b --> pK−mu+mu− decay is a flavour changing neutral current electroweak process, prohibited attree-level in the Standard Model of particle physics, occurring via electroweak penguin and W- box diagrams. The study ofsuch decay is sensitive to potential contributions from physics beyond Standard Model originated by new particlescirculating in the loops. We present the first observation of this baryonic decay and measurements of CP-violatingasymmetries, expected to be very small in the Standard Model.

Primary authors : Mr. MARANGOTTO, Daniele (INFN Milano e Universita' di Milano)

Co-authors : Dr. NERI, Nicola (MI) ; Dr. DEY, Biplab (INFN Milano)

Presenter :



Submitted by : Dr. NERI, Nicola

Submitted on Sunday 07 February 2016

Last modified on : Sunday 07 February 2016

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IFAE 2016 / Abstracts book First observation of the rare Lambda_b --> pK-m...


Abstract ID : 38

Risultati recenti sugli stati XYZ espettroscopia del charm a BESIII

Content :

Il rivelatore di BESIII si trova presso Beijing Electron Positron Collider II (BEPCII). BEPCII è un collider simmetricoelettrone-positrone con fasci di energia progettata nell'intervallo 1.0-2.3 GeV. La luminosità di picco raggiunta ad oggi è0.8X10^33 cm-2 s-1. Il periodo di presa dati è iniziato a maggio 2009 e ad oggi BESIII ha registrato un'ampia quantità didati alle energie corrispondenti alle risonanze J/psi, psi(2S) e psi(3770) e nella regione di energia superiore ai 4 GeV.Verranno presentati i risultati recenti dell'esperimento BESIII, e in particolar modo gli stati X, Y e Z recentemente osservatinella regione di massa del charmonio e i risultati ottenuti nell'ambito della spettroscopa del charm.

Session :

Frontiera dell'intensità

Primary authors : Mrs. FIORAVANTI, Elisa (INFN Ferrara)

Co-authors :

Presenter :



Submitted by : FIORAVANTI, Elisa

Submitted on Monday 08 February 2016

Last modified on : Monday 08 February 2016

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IFAE 2016 / Abstracts book Risultati recenti sugli stati XYZ e spettroscopia ...


Abstract ID : 39

Risultati di DAMA/LIBRA e prospettiveContent :

L'esperimento DAMA/LIBRA è composto da circa 250 kg di cristalli scintillatori ultra radiopuri di NaI(Tl). L’esperimento èin funzione presso il Laboratorio Nazionale del Gran Sasso dell’Istituto Nazionale di Fisica nucleare. Lo scopo principaledell’esperimento è quello di studiare la componente particellare di materia oscura (DM) nell’alone galattico, sfruttando latecnica del segnale di modulazione annuale di DM, metodo che è indipendente da modelli. I dati raccolti conDAMA/LIBRA-fase1 e con il pioneristico DAMA/NaI (esperimento di prima generazione avente una massa di circa 100kg)sono stati già pubblicati; cumulativamente i risultati ottenuti si riferiscono ad una esposizione totale di 1.33 ton × anno su14 cicli annuali. Questi hanno fornito una evidenza indipendente da modelli della presenza di particelle di DM nell’alonegalattico con un livello di confidenza pari a 9.3 sigma, sulla base della marcatura di DM analizzata. Alla fine del 2010 èstato eseguito un importante upgrade dell’apparato sperimentale inaugurando così la fase2 dell’esperimento che haconsentito di diminuire significativamente la soglia energetica software degli eventi acquisiti. Recentemente sono statianche pubblicati nuovi e pioneristici studi sulla modulazione diurna di DM e sull’effetto ombra della Terra. Sono, inoltre,in fase di redazione varie nuove analisi corollarie sulla natura della DM. Attualmente, DAMA/LIBRA-fase2 procede comeda programma, ed è in corso uno studio su un ulteriore upgrade verso DAMA/LIBRA-fase3. Si sta procedendo, inoltre,anche alla definizione di un possibile DAMA/1ton già proposto fin dal 1996 dalla collaborazione.

Session :

Astroparticelle

Primary authors : Dr. CARACCIOLO, Vincenzo (LNGS)

Co-authors : COLLABORAZIONE, Dama (INFN)

Presenter :



Submitted by : CARACCIOLO, Vincenzo

Submitted on Monday 08 February 2016

Last modified on : Monday 08 February 2016

Comments :V. Caracciolo per la collaborazione DAMA.

Status : SUBMITTED

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IFAE 2016 / Abstracts book Risultati di DAMA/LIBRA e prospettive


Abstract ID : 40

Impatto dei decadimenti leptonici del$\tau$ sulla distribuzione $\bar{B}\to

D\mu\bar{\nu}$Content :

Il rapporto $R_{D}=\mathcal{B}(\bar B\to D\tau\bar{\nu})/\mathcal{B}(\bar B\to D\mu\bar{\nu})$ \`{e} una delle quantit\`{a}per cui il valore misurato dagli esperimenti presenta una discrepanza rispetto alla predizione teorica del Modello Standard.Lo scopo di questo lavoro e' analizzare l'impatto del decadimento $\tau\to\mu\bar{\nu}\nu$ nella determinazione di$R_{D}$. Infatti la catena di decadimento $\bar{B}\to D\tau(\to\mu\bar{\nu}\nu)\bar{\nu}$ rappresenta una sorgenteirriducibile di fondo per il processo $\bar B\to D\mu\bar{\nu}$. Tramite il calcolo analitico della distribuzione differenzialedi decadimento del processo $\bar{B}\to D\tau(\to\mu\bar{\nu}\nu)\bar{\nu}$ abbiamo valutato l'impatto di questo fondonella distribuzione dell'angolo di elicit\`{a} del muone e nell'energia del muone in $\bar B\to D\mu\bar{\nu}$. Questaanalisi ha permesso di identificare un nuovo metodo per determinare $R_{D}$ utilizzando solo il processo ``neutrinoinclusivo'' $\bar B\to D\mu X_{\nu}$. I risultati ottenuti sono stati implementati in un generatore Monte Carlo chedovrebbe facilitare l'estrazione di $R_{D}$ dai dati.

Session :

Frontiera Intensità

Primary authors : Prof. ISIDORI, Gino (Universität Zürich) ; Dr. VAN DYK, Danny (UniversitätZürich) ; BORDONE, Marzia (Universität Zürich)

Co-authors :

Presenter :



Submitted by : Ms. BORDONE, Marzia



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IFAE 2016 / Abstracts book Impatto dei decadimenti leptonici del $\tau$ sulla...


Abstract ID : 41

Ricerca di materia oscura leggera conCRESST-III

Content :

Grazie a molte e diverse osservazioni cosmologiche e' ormai un dato accertato che circa l’85% della massa presentenell’Universo esiste sotto forma di materia oscura. Nonostante questa grande abbondanza la natura di tale materia e'ancora ignota. Diversi esperimenti studiano la possibilita' di interazione diretta di particelle di materia oscura conrivelatori, sfruttando varie tecnologie. Il fenomeno ricercato e' lo scattering elastico di particelle di materia oscura suinuclei atomici presenti nei rivelatori. Gli esperimenti criogenici offrono al momento la migliore sensibilita' per particelle dimateria oscura leggera. Con l’esperimento CRESST-II e' stato possibile indagare l’esistenza di particelle di materia oscuracon massa inferiore al GeV/c2.CRESST utilizza cristalli scintillanti di CaWO4 operanti a temperature di pochi millikelvin come calorimetri criogenici.Questa tecnologia offre basse soglie energetiche di rivelazione che, unitamente alla presenza di nuclei leggeri, permette diesplorare con alta sensibilita' la regione di massa leggera dello spazio dei parametri per lo scattering spin-indipendente dimateria oscura su nuclei.In questa presentazione verranno discussi i principali risultati dell’ultima campagna di misura e come questi abbianoguidato la successiva attivita' di R per incrementare ulteriormente la sensibilita' per materia oscura leggera. Il prossimopasso in questa direzione e' CRESST-III del quale verra' presentato lo stato dei lavori e una proiezione sulla sensibilita'.

Session :

Cosmica/Astroparticelle

Primary authors : Mr. FERREIRO, Nahuel (Max Planck Institute for Physics)

Co-authors :

Presenter :



Submitted by : Mr. FERREIRO, Nahuel



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Status : SUBMITTED

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IFAE 2016 / Abstracts book Ricerca di materia oscura leggera con CRESST-III


Abstract ID : 42

The Frascati LINAC beam test facilityperformance and upgrades

Content :

Test beam and irradiation facilities are the key enabling infrastructures for research in HEP and astro-particles.In the last 11 years, the Beam-Test Facility (BTF) of the DAΦNE accelerator complex, in the Frascati laboratory, has gainedan important role in the European infrastructures devoted to the development and testing of particle detectors. Electron orpositron beam can be extracted before the injection into the damping ring to a dedicated transfer line, where a systemcomposed by a target plus a dipole and collimating slits, can attenuate and select the momentum of secondary particles innarrow (<1%) band. The secondary beam is thus driven to a dedicated experimental hall for beam-test activities (BTF,beam-test facility).

The facility can provide runtime tuneable electrons and positrons beams in a defined range of different parameters: energy(up to 750 MeV for e- and 540 MeV for e+), charge ( up to 1010 e /bunch) and pulse length (1.4–40 ns). The bunchdelivering rate is depending on the DAFNE injections (up to 49 Hz). The electron beam spot and divergence can beadjusted, down to sub-mm sizes and approximately 2 mrad. Photons can be produced on a Bremsstrahlung active target,and energy-tagged inside a dipole magnet by means of Silicon micro-strip detectors. An optimized, shielded Tungstentarget is used for neutron photo-production: about 8 10-7/primary, 1 MeV neutron are produced.

Overall, an average of 200 beam days are delivered to about 20 experimental groups each year. The possibility ofdelivering an high-intensity positron beam, opens the opportunity of performing positron annihilation missing massexperiments for the search of light dark matter particles, like dark photons, ALPs, etc.; recently the PADME experimenthas been approved by INFN for running at the BTF in late 2017/beginning of 2018, for reaching an exclusion of ε=10-3 forinvisible decays, up to 26 MeV/c2 dark photon masses.

An important upgrade program of the facility is under evaluation, along three main lines: consolidation of the LINACinfrastructure, in order to guarantee a stable operation in the longer term; upgrade of the LINAC energy, in order toincrease the facility capability (especially for the almost unique extracted positron beam); doubling of the BTF beam-lines,in order to cope with the significant increase of users due to the much wider range of applications.

Session :

Nuove tecnologie

Primary authors : DI GIULIO, Claudio (LNF) ; FOGGETTA, Luca Gennaro (LNF) ; BUONOMO,Bruno (LNF) ; VALENTE, Paolo (ROMA1)

Co-authors :

Presenter :



Submitted by : VALENTE, Paolo

Submitted on Wednesday 10 February 2016

Last modified on : Wednesday 10 February 2016

Comments :

IFAE 2016 / Abstracts book The Frascati LINAC beam test facility performance ...


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Track judgments :

IFAE 2016 / Abstracts book The Frascati LINAC beam test facility performance ...


Abstract ID : 43

Actvity of research and development ofLow Gain Avalance Detector

Content :

In questo contributo presenterò le caratteristiche dei sensori al silicio a basso guadagno (Low Gain Avalance Detector -LGAD); I rivelatori LGAD sono caratterizzati da un rumore simile a quello dei rivelatori al silicio senza guadagno, mahanno grandi segnali: questi rivelatori quindi combinano i vantaggi di APD con quelli dei rivelatori al silicio tradizionali.Sfruttando l'ampiezza del segnale, i rivelatori LGAD sono adatti per la progettazione di rivelatori di tempo, raggiungendo,secondo la simulazione, una risoluzione temporale di alcune decine di picosecondi.Presenterò’ le attività’ di progettazione e produzione di LGAD in collaborazione con due centri internazionali di ricerca, laCNM di Barcellona e la Fondazione Bruno Kessler (FBK) di Trento.Descriverò inoltre le principali tipologie di misure svolte presso i laboratori universitari degli INFN sezione di Torino, perla caratterizzazione ed il test di Sensori LGAD.

Session :

Nuove tecnologie

Primary authors : FERRERO, Marco (TO)

Co-authors :

Presenter :



Submitted by : FERRERO, Marco



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Status : SUBMITTED

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IFAE 2016 / Abstracts book Actvity of research and development of Low Gain Av...


Abstract ID : 44

Il rivelatore a GEM Cilindriche perl’esperimento BESIII: misura delle

prestazioni in campo magnetico e statodel progetto

Content :

Un nuovo rivelatore a GEM cilindriche è in fase di sviluppo per potenziare il sistema di tracciamento dell'esperimentoBESIII presso l’IHEP di Pechino. Il nuovo rilevatore andrà a sostituire la camera a deriva interna dell’esperimento in mododa migliorare significativamente la risoluzione spaziale lungo la direzione del fascio (sigma_z ~ 300 µm) mantenendoinalterate le attuali prestazioni di risoluzione dell'impulso (sigma_pt/Pt ~0.5% at 1 GeV) e di risoluzione radiale (sigma_xy~ 130µm).

Sono state studiate le prestazioni di prototipi 10x10cm^2 in campo magnetico con due test su fascio presso il CERN. Irisultati ottenuti utilizzano l'informazione della carica e quella temporale combinando il metodo del centroide di carica conquello della camera a proiezione temporale (µ-tpc). I risultati di risoluzione spaziale sono i migliori mai ottenuti per unrivelatore a GEM cilindriche in campo magnetico a 1 Tesla.

Parallelamente a questi studi un prototipo cilindrico con le dimensioni del rivelatore finale è stato terminato e la proceduradi assemblaggio è stata testata con successo. Le tecniche di costruzione e i risultati ottenuti, assieme ai principali passaggidell'assemblaggio saranno mostrati in questa presentazione.

Session :

Nuove Tecnologie

Primary authors : FARINELLI, Riccardo (FE)

Co-authors :

Presenter :



Submitted by : FARINELLI, Riccardo



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IFAE 2016 / Abstracts book Il rivelatore a GEM Cilindriche per l’esperimento ...


Abstract ID : 45

Searches for a heavy scalar boson Hdecaying to a pair of 125 GeV Higgs

bosons hh or for a heavy pseudo scalarboson A decaying to Zh, in the final

states with h-> tau tau in CMSContent :

A search for a heavy scalar boson H decaying into a pair of lighter standard-modellike 125 GeV Higgs bosons h and asearch for a heavy pseudoscalar boson A decaying into a Z and an h boson are presented. The H->hh and A ->Zh analysesare performed on a final state consisting of two taus and two b jets and of two leptons and two taus, respectively Thesearches are carried out on pp collisions data collected by CMS at a centre of- mass energy of 8 TeV, corresponding to anintegrated luminosity of 19,7 fb^-1.

Session :

LHC dottorandi (CMS)

Primary authors : BRIVIO, Francesco (M)

Co-authors :

Presenter :



Submitted by : GENNAI, Simone



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Status : SUBMITTED

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IFAE 2016 / Abstracts book Searches for a heavy scalar boson H decaying to a ...


Abstract ID : 46

The Run-2 tracking performances ofthe CMS detector

Content :

In June 2015 LHC re-started, after more than two years of upgrade works. The main improvements with respect to theprevious running period (Run I) are proton-proton collisions with a center of mass energy of 13 TeV and a bunch spacingof 25ns. These new conditions call for a complete characterization of the detectors from the beginning, in order tore-calibrate the whole system and verify its performances. This talk focuses on the performance analysis of the CMStracking system, the used strategies will be presented and the first results, from both direct and indirect measurements,will be shown. Direct investigations about vertex finding, tracking properties and muon reconstruction efficiencymeasurement with tag and probe technique will be discussed. An indirect estimation of pion reconstruction efficiency willbe also discussed using as probes the different decays of charmed and strange mesons.

Session :


Primary authors : MARIANI, Valentina (infn e Universita Perugia)

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Status : SUBMITTED

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IFAE 2016 / Abstracts book The Run-2 tracking performances of the CMS detecto...


Abstract ID : 47

SUSY Searches with the CMS detectorContent :

After a period of maintenance the LHC was restarted in 2015 delivering p-p collision at a new center of mass energy of 13TeV, this new achievement by the machine opened the phase space of many searches for physics beyond the standardmodel (BSM). In this talk a summary of the CMS searches for supersymmetry (SUSY) with 2.2/fb of proton-protoncollisions at sqrt{s}=13 TeV is presented, covering a broad number of models and scenarios. Even at this early stage thenew searches greatly extend the reach of the previous Run1 analyses limiting the phase space for natural SUSY to exist.

Session :


Primary authors : GIORDANO, Ferdinando (CT)

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Status : SUBMITTED

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IFAE 2016 / Abstracts book SUSY Searches with the CMS detector


Abstract ID : 48

SHiP: a new facility with a dedicateddetector to search for new long-lived

neutral particles and studying tauneutrino properties and nucleon

structure functionsContent :

SHIP is a new general purpose fixed target facility, whose Technical Proposal has been recently reviewed by the CERNSPS Committee, who recommended that the experiment proceeds further to a Comprehensive Design phase. In its initialphase, the 400GeV proton beam extracted from the SPS will be dumped on a heavy target with the aim of integrating$2\times 10^{20}$ pot in 5 years. A dedicated detector, based on a long vacuum tank followed by a spectrometer andparticle identification detectors, will allow probing a variety of models with light long-lived exotic particles and massesbelow O(10) GeV/c$^2$. The main focus will be the physics of the so-called Hidden Portals, i.e. search for Dark Photons,Light scalars and pseudo-scalars, and Heavy Neutrinos. The sensitivity to Heavy Neutrinos will allow for the first time toprobe, in the mass range between the kaon and the charm meson mass, a coupling range for which Baryogenesis andactive neutrino masses could also be explained. Direct detection of light and long-lived SUSY particles, such as RPVneutralinos and pseudo-Dirac gauginos could also be performed in an unexplored parameter range. Another dedicateddetector will allow the study of neutrino cross-sections and angular distributions, and it will be the focus of the talk.$\nu_\tau$ deep inelastic scattering cross sections will be measured with a statistics 1000 times larger than currentlyavailable, with the extraction of the $F_4$ and $F_5$ structure functions, never measured so far and allow for new tests oflepton non-universality with sensitivity to BSM physics.

Session :

Cosmica/Astroparticelle

Primary authors : SHIP, Collaboration (INFN)

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Presenter :



Submitted by : BONIVENTO, Walter

Submitted on Thursday 11 February 2016

Last modified on : Thursday 11 February 2016

Comments :Abstract sottomesso dal RN dell'esperimento. Il giovane speaker sara' comunicato dopol'accettazione del talk.Presentazione orale.

Status : SUBMITTED

IFAE 2016 / Abstracts book SHiP: a new facility with a dedicated detector to ...


Track judgments :

IFAE 2016 / Abstracts book SHiP: a new facility with a dedicated detector to ...


Abstract ID : 49

The CMS-TOTEM Precision ProtonSpectrometer

Content :

The CMS-TOTEM Precision Proton Spectrometer (CT-PPS) is a joint project whose goal is the study of central exclusiveproduction processes in proton-proton collisions. For CT-PPS, such processes are characterized by the presence of twoprotons scattered at small angles and detected inside the LHC beam pipe and one or more particles produced at smallrapidity values and detected by the central CMS detector. This gives access to a variety of physics processes of interest,including the study of quartic gauge couplings, events with invisible final states and searches for new resonances producedin photon-photon or gluon-gluon fusion. A description of the experimental set-up will be presented, along with the currentstatus of the project and its prospects for the next LHC runs.

Session :

LHC plenary (CMS)

Primary authors : Dr. TBD, Tbd (TBD)

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Comments :

Status : SUBMITTED

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IFAE 2016 / Abstracts book The CMS-TOTEM Precision Proton Spectrometer


Abstract ID : 50

Dark Matter Search at CMSContent :

The Dark Matter search is currently one of the most promising investigation field at the Large Hadron Collider at CERN.Even though its existence has been pointed out by several astrophysical observations, no direct evidence has been found sofar, due to the fact that it does not interact electromagnetically with the detectors, resolving de facto in a missingtransverse energy contribution in the final balance. Many Dark Matter candidates have been proposed in literature withinnew physics models at the electroweak symmetry breaking scale. Here we present the latest results of the main DarkMatter searches using data collected during RUN I and RUN II by the CMS experiment at LHC.

Session :

LHC Plenary (CMS)

Primary authors : MINIELLO, Giorgia (BA)

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Presenter :






Comments :

Status : SUBMITTED

Track judgments :

IFAE 2016 / Abstracts book Dark Matter Search at CMS


Abstract ID : 51

(Anti-)hypertriton and exoticaproduction in Pb-Pb collisions with

ALICE at the LHCContent :

ALICE is the experiment designed and optimized for the study of the heavy-ion collisions at the LHC energies.

On one side, the excellent particle identification (PID) capabilities of the ALICE detector are exploited to identify nuclei,such as deuterons, $\rm ^{3}{H}$, $\rm ^{3}{He}$, $\rm ^{4}{He}$ and their antiparticles, in addition to light hadrons.PID is performed by measuring the specific energy loss in the Time Projection Chamber (TPC) and the particle velocitywith the Time-Of-Flight detector.

On the other hand, the high-tracking resolution of the Inner Tracking System and the TPC allows for the separation ofprimary and secondary vertices.

These features allow one to study the (anti-)$\rm ^{3}_{\Lambda}H$ production via its mesonic weak decay channel ($\rm^{3}_{\Lambda}H \rightarrow\ ^{3}{He}+\pi^{-}$) and the search for weakly bound states containing a $\Lambda$ hyperon,such as the H-dibaryon (H$\rightarrow \Lambda$+p+$\pi^{-}$) and $\Lambda$n ($\Lambda$n $\rightarrow$ d+$\pi^{-}$).

The measurement of the hypertriton production rates in Pb-Pb and its lifetime will be presented in this talk. The upperlimits on the production of exotic states will also be shown. The experimental results will be compared with the predictionof thermal (statistical) and coalescence models.

Session :

Intensità

Primary authors : TROGOLO, Stefano (TO)

Co-authors :

Presenter :



Submitted by : TROGOLO, Stefano



Comments :PhD student, Università di Torino

Status : SUBMITTED

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IFAE 2016 / Abstracts book (Anti-)hypertriton and exotica production in Pb-Pb...


Abstract ID : 52

Direct measurement of the22Ne(p,g)23Na reaction cross section

at LUNAContent :

The 22Ne(p,g)23Na reaction takes part in the NeNa cycle of hydrogen burning, influencing the production of elementsbetween 20Ne and 27Al in red giant stars, asymptotic giant stars, classical novae and type Ia supernovae.The 22Ne(p,g)23Na reaction rate is very uncertain because of a large number of tentative resonances in the Gamowwindow, where only upper limits were quoted in literature.A direct measurement of the 22Ne(p,g)23Na reaction cross section has been carried out at LUNA using a windowlessdifferential-pumping gas target with two high-purity germanium (HPGe) detectors.A new measurement with a 4pi bismuth germanate (BGO) summing detector is ongoing.During the HPGe phase of the experiment the strengths of the resonances at 156.2 keV, 189.5 keV and 259.7 keV have beendirectly measured for the first time and their contribution to the reaction rate has been calculated.The decay scheme of the newly discovered resonances has been established as well and some improved upper limits on theunobserved resonances have been put.The BGO detector with its 70% gamma-detection efficiency allows to measure the cross section at lower energy.In order to further investigate the resonances at 105 keV and 71 keV, the BGO detector took data until the end of last yearand the direct-capture component of the cross section has been measured as well.In this contribution the adopted experimental techniques will be illustrated and the new LUNA preliminary results will bepresented discussing their implications on the reaction rate.

Session :

Sessione Cosmica/Astroparticelle

Primary authors : FERRARO, Federico (GE)

Co-authors :

Presenter :



Submitted by : FERRARO, Federico



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Status : SUBMITTED

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IFAE 2016 / Abstracts book Direct measurement of the 22Ne(p,g)23Na reaction c...


Abstract ID : 53

The LHCf experiment: measurementsof very forward particles production

spectra at LHCContent :

The LHC forward (LHCf) experiment consists of two small sampling calorimeters installed at ±140m from LHC IP1, so thatit can detect neutral particles produced by proton-proton collisions in the very forward region (pseudo-rapidity > 8.4). Themain aim of the experiment is to provide precise measurements of the particles production spectra that can be useful forthe tuning of hadronic interaction models used by ground-based cosmic rays experiments. LHC is the most suitable placefor this purpose because p-p collisions at √s = 14TeV is equivalent to $10^{17}$ eV in the reference frame in which thetarget is at rest, an energy very near to the one of Ultra High Energy Cosmic Rays.

In the past years LHCf acquired data from p-p collisions at different energies (√s = 0.9 TeV, 2.76 TeV, 7 TeV and 13 TeV)and from p-Pb collisions (√$s_{NN}$ = 5.02 TeV). In this talk, we would like to present the analysis results published by thecollaboration, relative to neutrons, photons and $π^{0}$ production spectra, compared with models predictions. Inparticular, we will discuss about $π^{0}$ , the best probe LHCf can use to study forward physics, which offers thepossibility to study pt and pz spectra, to test Feynman scaling hypothesis and to estimate the nuclear modification factor.Finally, preliminary results relative to photon energy spectra at √s = 13 TeV will be presented.

Session :

Sessione Cosmica/Astroparticelle

Primary authors : Dr. BERTI, Eugenio (INFN Firenze)

Co-authors : Dr. MATSUBAYASHI, Eri (Nagoya University) ; UENO, Mana (Nagoya University) ;OKUNO, Yuki (Nagoya University) ; Prof. MURAKI, Yasushi (Nagoya University) ; Prof.MATSUBARA, Yutaka (Nagoya University) ; Prof. MASUDA, Kimiaki (Nagoya University) ;IWATA, Taiki (Waseda University) ; Prof. KASAHARA, Katsuaki (Waseda University) ; Prof.SUZUKI, Takuya (Waseda University) ; Prof. TORII, Shoji (Waseda University) ; Prof.SHIMIZU, Yuki (Kanagawa University) ; Dr. SAKURAI, Nobuyuki (Kobayashi-MaskawaInstitute, Nagoya University) ; Prof. TURNER, William (LBNL, Berkeley) ; Dr. PERROT,Anne Laure (CERN) ; Prof. CASTELLINI, Guido (Università di Firenze) ; ADRIANI, Oscar(FI) ; BONECHI, Lorenzo (FI) ; Mr. ZHOU, Qidong (Nagoya university) ; BONGI, Massimo(FI) ; D'ALESSANDRO, Raffaello (FI) ; DEL PRETE, Marina (FI) ; Prof. ITOW, Yoshitaka(STEL/KMI Nagoya University) ; MAKINO, Yuya (Nagoya University) ; Dr. MENJO, Hiroaki(Nagoya University, Japan) ; PAPINI, Paolo (FI) ; Dr. SAKO, Takashi (Nagoya University) ;RICCIARINI, Sergio Bruno (FI) ; TRICOMI, Alessia Rita (CT) ; Dr. TIBERIO, Alessio (FI)

Presenter :



Submitted by : Dr. BERTI, Eugenio



Comments :

IFAE 2016 / Abstracts book The LHCf experiment: measurements of very forward...


In merito la sessione, trattandosi di un esperimento di alte energie inteso per risolvere deiproblemi di raggi cosmici, ho specificato "Sessione Cosmica/Astroparticelle", ma credopossa stare ugualmente bene in "Sessione Frontiera Energia". Relativamente a"presentation type", non riesco a specificare il tipo (immagino sia talk o poster), ma nellemie intenzioni si tratterebbe di un talk.

Status : SUBMITTED

Track judgments :

IFAE 2016 / Abstracts book The LHCf experiment: measurements of very forward...


Abstract ID : 54

Study of Higgs Boson decaying intoWW at 13 TeV with CMS detector

Content :

I will present the first results of the H->WW->2l2nu analysis at 13 TeV. Data are collected during the 2015 proton-protonrunning period of the LHC, corresponding to a total integrated luminosity of 2.120 pb^-1. The analysis targets thegluon-gluon fusion production mode, which is the main production mode for Higgs bosons over the full mass range.Results for the final state with two WW bosons decaying into an electron and a muon, oppositely-charged, will be shown.

Session :

Sessione Frontiera Energia

Primary authors : RUSSO, Lorenzo (FI)

Co-authors :

Presenter :



Submitted by : RUSSO, Lorenzo



Comments :

Status : SUBMITTED

Track judgments :

IFAE 2016 / Abstracts book Study of Higgs Boson decaying into WW at 13 TeV wi...


Abstract ID : 55

Double parton scattering in same signW pairs

Content :

The double parton scattering (DPS) in proton-proton collisions at a center-of-mass energy of 8 TeV has been investigatedusing the same-sign W boson pair final state, with each W boson decaying into muon and associated neutrino. The datasample corresponds to an integrated luminosity of 19.7 fb-1 collected by the CMS detector at the Large Hadron Collider.The observables sensitive to double parton scattering are defined and studied, followed by a multivariate analysis in orderto enhance the process sensitivity. A limit on the DPS yield, along with the corresponding limit on the production crosssection (sDPS WW ), has been evaluated.

Session :


Primary authors : Dr. CIANGOTTINI, Diego (CERN)

Co-authors :

Presenter :






Comments :

Status : SUBMITTED

Track judgments :

IFAE 2016 / Abstracts book Double parton scattering in same sign W pairs


Abstract ID : 56

Study of Higgs Boson decaying intoWW at 13 TeV with CMS detector

Content :

I will present the first results of the H->WW->2l2nu analysis at 13 TeV. Data are collected during the 2015 proton-protonrunning period of the LHC, corresponding to a total integrated luminosity of 2.120 pb^-1. The analysis targets thegluon-gluon fusion production mode, which is the main production mode for Higgs bosons over the full mass range.Results for the final state with two WW bosons decaying into an electron and a muon, oppositely-charged, will be shown.

Session :


Primary authors : RUSSO, Lorenzo (FI)

Co-authors :

Presenter :






Comments :

Status : SUBMITTED

Track judgments :

IFAE 2016 / Abstracts book Study of Higgs Boson decaying into WW at 13 TeV wi...


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