1 iwhss_11 april 6 2011 a.magnon iwhss’11 4-6 april 2011 paris

1IWHSS_11 April 6 2011 A.Magnon

IWHSS’11 4-6 April 2011 PARIS


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

6IWHSS_11 April 6 2011 A.MagnonIWHSS_11 April 6 2011 A.Bachetta 6

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

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


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


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


16IWHSS_11 April 6 2011 M.Burkardt 16


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

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

33IWHSS_11 April 6 2011 C. Franco


Tuesday Morning

J. Friedrich D. Drechsel D. Bugg G. Bali A. Szczepaniak

37IWHSS_11 April 6 2011 J. Friedrich

41IWHSS_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-+



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.



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


Tuesday Afternoon

J.C. Peng A. Ogawa

V. Barone

52IWHSS_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



http://www.bnl.gov/npp/docs/pac0610/aschenauer_DY-collider_june10.pdf

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


Wednesday Morning

A. Ferrero E. Leader B. Pire

A.M

Just Now … !

64

Get Up ….

… for Compass-II

1 iwhss_11 april 6 2011 a.magnon iwhss’11 4-6 april 2011 paris

Documents

meziani151516 iwhss

burkardt161617 iwhss

burkardt171718 iwhss

florian2222 iwhss

experimental effort

kaon sidisloi12

magnon iwhss11

kaon sidise12