Physics - Detector Optimization Studies NuInt05 Highlights Jorge G. Morfín Fermilab

Physics - Detector Optimization StudiesNuInt05 Highlights

Jorge G. MorfínFermilab

Fermilab PAC: MINERA - 2 April 20042

What is Value Engineering (VE)? (1) It’s a way of determining the basic function of an item.

(2) It’s a way of evaluating high cost areas and systematically reducing those costs.

(3) It’s a way of analyzing a problem area and developing alternative ways of resolving the problem.

(4) It’s a way of selecting the best possible alternative to perform the basic function at the lowest cost. Value Engineering thus extends financial, manpower, and material resources.

T.J. Sarlina


Value Management (VM) principles are essential to proper program management and have been incorporated from the early design and development stages of the technical requirements. These principles have also been employed as the cost and schedule parameters matured over time. Use of the VM approach provides a systematic framework to analyze the functions of systems, equipment, facilities, services, and supplies for the purpose of achieving the essential functions at the lowest life cycle cost consistent with required performance, quality, reliability and safety. VM elements have been incorporated as a part of each of the technical and program reviews to date.


VM Examples

Anything with 2 or more vendor quotes Reuse of existing materials Determining physics drivers for nuclear targets PMT’s on top or bottom Need for a Coil Granularity - size of triangles Off-the-shelf purchase vs custom equipment


What this means for us….

Short concise document for each physics-channel study containing: Description of physics goals What components of detector used in the analysis Technical requirements/detector response to meet the physics goals Description of how detector response depends on design modifications Description of how physics results depend on design modifications


Coherent Pion Production MINERA: 85 K CC / 37 K NC: CH and 25 K (50K) CC / 13 K (25K)NC: Fe (Pb)

H. Gallagher

Selection criteria reduce the signal by a factor of three - while reducing the background by a factor of ≈ 1000.

signal

Selection criteria discussed atprevious meeting


Expected MINERA Results - Coherent Production

Rein-Seghal

Paschos-Kartavtsev

Expected MiniBooNe and K2K measurements

Errors now include estimated background subtraction

MinerA MINERA’s nuclear targets allow thefirst measurement of the A-dependence

of coh across a wide A range


Coherent production: Changing strip size

I have run my coherent code with new resolutions based on the changes mentioned here. If I understand correctly, in trial (1) I should be degrading the angular resolution by 4% and in trial (2) I should be improving it by 3%. I have taken the nominal smearing to be 0.5 degrees so these would give 0.52 deg and 0.485 deg respectively. I am really surprised that the angular resolution changes so little for such large changes in the strip size.

Degradation at this level has essentially zero impact on the coherent analysis as far as I can tell. The changes I get in the number of events passing cuts where I have smeared the reconstruction using these new numbers is on the same order as the statistical uncertainty in the MC sample I have handy, which is around 2.5%.


Recent K2K SciBar ResultM. Hasegawa et al. - hep - ex/0506008

QuickTime™ and aTIFF (LZW) decompressor

are needed to see this picture.

Expect 470 CC coherent events according to Rein-Sehgal Find 7.6 ± 50.4


MINERA CC Quasi-Elastic MeasurementsFully simulated analysis, - realistic detector simulation and reconstruction

Average: eff. = 74 % and purity = 77%

Expected MiniBooNE and K2K measurements

Quasi-elastic ( + n --> + p, around 800 K events) Precision measurement of E) and d/dQ important for neutrino oscillation studies.Precision determination of axial vector form factor (FA), particularly at high Q2 Study of proton intra-nuclear scattering and their A-dependence (C, Fe and Pb targets)


Lar TPC: Evt 3: QUASI ELASTIC Lar TPC: Evt 3: QUASI ELASTIC (2.5%)(2.5%)

Proton K.E. dominated by the requirements1.K.E. > 50 MeV2.Full containment

61 events - 73 expected from MC


NOMAD: The sleeping giant wakes…slowly


NOMAD: Staatistics and Physics program



NOMAD: QE event


NOMAD: QE result


Resonance Production - S. Wood and M. Paschos

Total Cross-section and d/dQ2 for the ++ assuming 50% detection efficiencyErrors are statistical only: 175K ++

T


MiniBooNe: CC+ Measurement


Nuclear Effects MINERA: 2.8 M events off CH, 600 K off C and 1 M events off of Fe and Pb

S. Boyd, JGM, R. Ransome Q2 distribution for SciBar detector

MiniBooNEFrom J. Raaf(NOON04)

All “known” nuclear effects taken into account:Pauli suppression, Fermi Motion, Final State Interactions

They have not included low- shadowing that is only allowed with axial-vector (Boris Kopeliovich at NuInt04)

Lc = 2 / (m2 + Q2) ≥ RA (not m

2) Lc

100 times shorter with mallowing low -low Q2 shadowing

ONLY MEASURABLE VIA NEUTRINO - NUCLEUS INTERACTIONS! MINERA WILL MEASURE THIS ACROSS A WIDE AND Q2 RANGE WITH C : Fe : Pb

Problem has existed for over two years

Larger than expected rollover at low Q2

http://hepunx.rl.ac.uk/~candreop/minos/meeting/2003_05_27/ANN.pdf


NuInt05 - Nuclear Effects


High xBj parton distributionsHow well do we know quarks at high-x?

Ratio of CTEQ5M (solid) and MRST2001 (dotted) to CTEQ6 for the u and d quarks at Q2 = 10 GeV2. The shaded green envelopes demonstrate the range of possible distributions from the CTEQ6 error analysis.

Recent high-x measurements indicate conflicting deviations from CTEQ: E-866 uV too high, NuTeV uV & dV too low

CTEQ / MINERA working group to investigate high-xBj region.


Indication that the valence quarks not quite right at high-x??E866 -Drell-Yan Preliminary Results (R. Towell - Hix2004)

• xbeam distribution measures 4u + d as x--> 1.

• Both MRST and CTEQ overestimate valence distributions as x --> 1 by 15-20%.

• Possibly related to d/u ratio as x --> 1, but requires full PDF-style fit.

• Radiative corrections have recently been calculated. (Not yet fully applied)

xtarget xbeam


NuTeV Compared to CCFR (currently in PDF fits)at High-x Indicates Effect Opposite to E866

V. Radescu - DIS04

nuclear effects?


NOMAD Analysis - NOT DATA YETTwist -6 is required

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Physics - Detector Optimization Studies NuInt05 Highlights Jorge G. Morfín Fermilab