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1IWHSS_11 April 6 2011 A.Magnon
IWHSS’11 4-6 April 2011 PARIS
2IWHSS_11 April 6 2011 A.Magnon
Monday Morning
A.Bachetta A.Martin
M.Burkardt Z.E.Meziani
3IWHSS_11 April 6 2011 A.Bachetta
4IWHSS_11 April 6 2011 A.Bachetta
5IWHSS_11 April 6 2011 A.Magnon
6IWHSS_11 April 6 2011 A.MagnonIWHSS_11 April 6 2011 A.Bachetta 6
7IWHSS_11 April 6 2011 A.MagnonIWHSS_11 April 6 2011 A.Bachetta 7
8IWHSS_11 April 6 2011 A.MagnonIWHSS_11 April 6 2011 A.Bachetta 8
Transverse Spin and Momentum Structure of the Nucleon
SIDIS off transversely polarised targets: DESY (HERMES)
CERN (COMPASS) JLab Z.-E. Meziani
and eRHIC, EIC, ENC
hard polarised pp scatteringRHIC / BNL M. Grosse-Perdekamp
and several (future) projects for (polarised) Drell-Yan:
CERN (COMPASS) FNAL, JParc, RHIC, JINR, IHEP, GSI J.-C. Peng, A. Ogawa, A. Ferrero
p
ph
X
a large international theoretical and experimental effort
h
N
'
X
IWHSS_11 April 6 2011 A.Martin 9
KINEMATICAL REGION
27.5 GeV160 GeV
JLab 6 GeV
IWHSS_11 April 6 2011 A.Martin 10
IWHSS’11
same sign and strength: a very important, not obvious result!
π-
π+
h-
h+
Collins asymmetry - proton
indication for: not a higher twist effect,weak Q2 dependence of the Collins FF
COMPASS sign conventionIWHSS_11 April 6 2011 A.Martin 11
IWHSS’11
Sivers asymmetry - proton
π-h-
• same sign
• COMPASS results in the overlap region smaller by a factor ~ 2
π+
h+
good agreements
IWHSS_11 April 6 2011 A.Martin 12
E06‑010 JLAB Experiment to access the neutron
• Polarized 3He Target• Polarized Electron Beam
– ~80% Polarization– Fast Flipping at 30Hz– PPM level charge Asymmetry
controlled by online feed back• BigBite at 30º as Electron Arm
– Pe = 0.7 ~ 2.2 GeV/c • HRSL at 16º as Hadron Arm
– Ph = 2.35 GeV/c
Beam Polarimetry(Møller + Compton)
LuminosityMonitor
Students: Xin Qian (Duke), Chiranjib Dutta (Kentucky), and Kalyan Allada (Kentucky)
Spokespeople: X. Jiang (Los Alamos), J.-P. Chen (JLab), H. Gao (Duke), J.C. Peng (UIUC),
IWHSS_11 April 6 2011 Z.E.Meziani 13
Preliminary Neutron Collin/Sivers Asymmetries
Systematic uncertainty is still under study Curves: Diquark-quark Model (Ma), Global Fit
(Anselmino), Light-Cone quark model (Pasquini)
Collins
Sivers
IWHSS_11 April 6 2011 Z.E.Meziani 14
Courtesy of H. Avakian
E12-06-112: Pion SIDIS E12-09-008: Kaon SIDIS
E12-07-107: Pion SIDIS E12-09-009: Kaon SIDIS
LOI12-06-108: Pion SIDISLOI12-09-004: Kaon SIDIS
PAC approved experiments & LoIN
q
U
L
T
Complete program of TMDs studies for pions and kaons
Kaon measurements crucial for a better understanding of the TMDs “kaon puzzle”
Kaon SIDIS program requires an upgrade of the CLAS12
detector PID RICH detector to replace LTCCProject under development
TMDs program @ 12 GeV in Hall B
IWHSS_11 April 6 2011 Z.E.Meziani 15
16IWHSS_11 April 6 2011 M.Burkardt 16
17IWHSS_11 April 6 2011 M.Burkardt 17
18IWHSS_11 April 6 2011 M.Burkardt 18
19IWHSS_11 April 6 2011 A.Magnon
Monday Afternoon
D. De Florian Ph. Haegler
M. Grosse Perdekamp C. Franco
20IWHSS_11 April 6 2011 A.Magnon 20
IWHSS_11 April 6 2011 D. De Florian 21
IWHSS_11 April 6 2011 D. De Florian 22
IWHSS_11 April 6 2011 D. De Florian 23
Nucleon parton distributions from lattice QCD
Philipp Hägler
supported by
Not quite as trivial as it might appear...
Typical „measurements“ on the lattice
IWHSS_11 April 6 2011 Ph. Haegler 25
Ju, Jd template figure (update)
LHPC arXiv:1001.3620
LHPC PRD `08 0705.4295
QCDSF (Ohtani et al.) 0710.1534
Goloskokov&Kroll EPJC`09 0809.4126
Wakamatsu 0908.0972
DiFeJaKr EPJC `05 hep-ph/0408173
(Myhrer&)Thomas PRL`08 0803.2775
[JLab Hall A PRL`07; HERMES JHEP`08]
[non-singlet, connected only; add. uncertainties due to chiral extrapolations, renormalization]*
**
*QCDSF/UKQCD preliminary*,1
1Sternbeck, Pleiter, Zanotti et al. 2011
lattice results fromcovariant BChPT extrapolations[Dorati, Gail, Hemmert NPA 2008]
lattice results fromcovariant BChPT extrapolations[Dorati, Gail, Hemmert NPA 2008]
IWHSS_11 April 6 2011 Ph. Haegler 26
Ph. Hägler, IWHSS, Paris 04/11
27
Sivers transverse momentum shift
28IWHSS_11 April 6 2011 M. Grosse-Perdekamp
Spin Physics Results from RHIC
Preliminaries: Facility Status QCD & PDFs vs Data
Gluon spin distribution Inclusive hadron and jet results QCD analysis Low x & x-dependence with di-jets and rapidity separated di-hadrons
W-production in polarized p-p First results from pp W eν
Transverse Spin Inclusive AN
Channels isolating Collins or Sivers effects
Drell Yan measurements in Akio Owaga’s talk
M. Grosse-Perdekamp UIUC
ΔG(x) from DSSV Global QCD Analysis
RHIC
Range
0.05<x<0.2
Large-x
x≥0.2
Small-x
x≤0.05
ΔGtrunc[0.05,0.2] ≈ 0 since node at x≈0.1
Data constrains only truncated first moment of ΔG(x) in x-interval [0.05,0.2], but not functional form at low or high x
ΔGtrunc in large-x region constrained to be small by requirement that ΔG(x) ≤ G(x); at Q2=10 GeV2: ΔGtrunc[0.3,1.0] ≤ 0.03
At small x, ΔG(x) can differ from DSSV beyond errors without violating funda-mental constraints
ΔGtrunc[0.05,0.2] = ∫ ΔG(x) dx = 0.0050.2
0.05
+0.051
-0.058-0.058-0.058-0.058
x ΔG(x)
de Florian, Sassot, Stratmann,Vogelsang PRD 80:034030,2009
IWHSS_11 April 6 2011 M. Grosse-Perdekamp 29
pT,1>3 GeV, pT,2 > 1.5 GeV error bars are statistical only
Projected ALL(π0) in MPC for different ΔG(x) at low x
for ∫Ldt = 300 pb-1, √s = 500 GeV (RHIC W program, 2011 to 2015)
Increasing Δgtrunc [10-4,0.05]
ΔGtrunc= -.1 ΔGtrunc= -.2 ΔGtrunc= -.5
ΔGtrunc [10-4,0.05] = -0.1 will be observableIWHSS_11 April 6 2011 M. Grosse-Perdekamp 30
Summary
o Gluon Spin contribution constraint for 0.05 < x < 0.2 use di-jet and di-hadron measurements to probe x-dependence ΔG(x) and forward jet production to reach low x, x~0.001.
o W-program has started with electrons (STAR & PHENIX) and muons (PHENIX). Luminosity accumulation will take 3-4 runs.
o Precision data on AN are available. Exciting new Drell Yan experiment at IP2: AnDY (see Akio Ogawa’s talk). Initial measurements to isolate Collins -and Sivers- asymmetries. Much improvement from detector upgrades and increased statistics.
31IWHSS_11 April 6 2011 M. Grosse-Perdekamp
32
33IWHSS_11 April 6 2011 C. Franco
34IWHSS_11 April 6 2011 C. Franco
35IWHSS_11 April 6 2011 C. Franco
36IWHSS_11 April 6 2011 A.Magnon
Tuesday Morning
J. Friedrich D. Drechsel D. Bugg G. Bali A. Szczepaniak
37IWHSS_11 April 6 2011 J. Friedrich
38IWHSS_11 April 6 2011 J. Friedrich
39IWHSS_11 April 6 2011 J. Friedrich
40IWHSS_11 April 6 2011 J. Friedrich
41IWHSS_11 April 6 2011 D. Drechsel
42IWHSS_11 April 6 2011 D. Drechsel
43IWHSS_11 April 6 2011 D. Drechsel
David Bugg, Queen Mary, London
Topics in meson spectroscopy for Compass
(i) Look for the I=0 JPC=1-+ partner of p1(1600/1662)
(ii) Measure (4 )/ (2 ) s p s p from 1200-2000 MeV for JP=0+,1-,2+.
Sort out f0(1370), f2(1565) and r(1450). Check if f2(1810) exists or is really f0(1790).(iii) Check if p1(1405) is resonant or just a threshold
cusp.
IWHSS_11 April 6 2011 D. Bugg
The p1(1600/1660) looks a good hybrid candidate.It ought to have an I=0 partner of similar mass.The only likely decay mode is to a1(1260) :p JPC = 1++ + 0-+ = 1-+.
This is NOT easy because no angular dependence: there are only the r and a1 signals to go on, and the a1 is broad. However, other JPC will have angular dependence.
There exist possible partners with JPC = 2-+:h2(1860) and p2(1880); also (1800), p 0-+
Topics in meson spectroscopy for Compass
IWHSS_11 April 6 2011 D. Bugg
CONCLUSION: There is still lots to do and learn in meson spectroscopy. I doubt that heavy meson spectroscopy can go beyond narrow states, but it is important to complete light meson spectroscopy and baryon spectroscopy and learn what we can about hybrids and glueballs. Good luck !
The spectroscopy of I=1, C = +1 states and C=-1 states with I=0 and 1 could be completed by measuring polarisation in pp -> 3p0, , ; hhp hp wp and whp0; wh and wp0p0 at the forthcoming Fair facility. It just needs an extracted p beam of 5 x 104 p/s.
Topics in meson spectroscopy for Compass
IWHSS_11 April 6 2011 D. Bugg
47IWHSS_11 April 6 2011 G. Bali
48IWHSS_11 April 6 2011 G. Bali
49IWHSS_11 April 6 2011 A. Szczepaniak
50IWHSS_11 April 6 2011 A. Szczepaniak
51IWHSS_11 April 6 2011 A.Magnon
Tuesday Afternoon
J.C. Peng A. Ogawa
V. Barone
52IWHSS_11 April 6 2011 J.C. Peng
53
54IWHSS_11 April 6 2011 J.C. Peng
Future Drell-Yan Experiments
Akio Ogawa2011 Apr 5
IWHSS Paris 2011
55
at
The Relativistic Heavy Ion Collider
PHENIXSTAR
IP2(AnDY, IT)
Au+Au
Polarized p+p
d+Au
RHIC is a QCD lab
57
E.C.Aschenauer, A. Bazilevsky, L.C. Bland, K. Drees, C. Folz, Y. Makdisi, A. Ogawa, P. Pile, T.G. Throwe
Brookhaven National LaboratoryH.J. Crawford, J.M. Engelage, E.G. Judd
University of. California, Berkeley/Space Sciences Laboratory
C.W. PerkinsUniversity of. California, Berkeley/Space Sciences
Laboratory /Stony Brook UniversityA. Derevshchikov, N. Minaev, D. Morozov, L.V. Nogach
Institute for High Energy Physics, ProtvinoG. Igo, S. Trentalange
University of California, Los AngelesM. Grosse PerdekampUniversity of Illinois
M.X. LiuLos Alamos National Laboratory
H. AvakianThomas Jefferson National Accelerator Facility
E.J.BrashChristopher Newport University and TJNAF
C.F.PerdrisatCollege of William and Mary
V. PunjabiNorfolk State University
Li, XuanShandong University, China
Mirko Planinic, Goran Simatovic University of Zagreb, Croatia
ANDY at IP2“Feasibility Test of Large Rapidity Drell
Yan Production at RHIC”
Letter of Intent submitted 24 May 2010
http://www.bnl.gov/npp/docs/pac0610/Crawford_LoI.100524.v1.pdf
PAC presentation: http://www.bnl.gov/npp/docs/pac0610/aschenauer_DY-collider_june10.pdf
• Timeliness – Run when STAR & PHENIX is doing W program (2012-13)
• Acceptance/background rejection – Severe space constraints at STAR and PHENIX require major changes in the forward direction to do DY
• Is charge sign a requirement? – feed back to STAR/PHENIX forward upgrade plans
IWHSS_11 April 6 2011 A. Ogawa
AN for jets
58
arXiv:1103.1591 jet AN measurements are required to clarify signs of quark/gluon correlators related to Sivers functions.
from p+pp
“old” Sivers function
“new” Sivers function
s=200 GeV
STAR FMS ECal only “jet-like” event Positive AN for jet-like events Lack of cos(γ) dependence AN for jets will be non-0 ?
ANDY is taking HCal jet trigger right now(~500M jet trigger events as of last week)We have ~1/pb as of last weekNeed >5x more (possible in 1 week if 3IP collisions from start of fill)
Determine whether AN(jet) is non-0 isa requirement for AN(DY) sign-flip measurement
Letter of Intent: Measurement of Dimuons from Drell-Yan Process with Polarized Proton Beams and an Internal Target at RHIC
– http://www.bnl.gov/npp/docs/pac0610/Goto_rhic-drell-yan.pdf– Academia Sinica (Taiwan): W.C. Chang– ANL (USA): D.F. Geesaman, P.E. Reimer, J. Rubin– UC Riverside (USA): K.N. Barish– UIUC (USA): M. Groose Perdekamp, J.-C. Peng– KEK (Japan): N. Saito, S. Sawada– LANL (USA): M.L. Brooks, X. Jiang, G.L. Kunde, M.J. Leitch, M.X.
Liu, P.L. McGaughey– RIKEN/RBRC (Japan/USA): Y. Fukao, Y. Goto, I. Nakagawa, K.
Okada, R. Seidl, A. Taketani– Seoul National Univ. (Korea): K. Tanida– Stony Brook Univ. (USA): A. Deshpande– Tokyo Tech. (Japan): K. Nakano, T.-A. Shibata– Yamagata Univ. (Japan): N. Doshita, T. Iwata, K. Kondo, Y. Miyachi
IWHSS_11 April 6 2011 A. Ogawa
60IWHSS_11 April 6 2011 V. Barone
61IWHSS_11 April 6 2011 V. Barone
62
Fracture Functions
63IWHSS_11 April 6 2011 A.Magnon
Wednesday Morning
A. Ferrero E. Leader B. Pire
A.M
Just Now … !
64
Get Up ….
… for Compass-II
65IWHSS_11 April 6 2011 J.C. Peng