E12-10-006 and E12-11-007
SIDIS Charged-Pion Production
with SoLID and Pol. 3He TargetJin Huang, MIT
For the SoLID SIDIS collaboration
Jin Huang <[email protected]> 2
ANL, Peking U., CalState-LA, CIAE, W&M, Duke, FIU, Hampton, Huangshan U., Huazhong U.S.T., IMP CAS, Cagliari U. and INFN, INFN-Catania, INFN-Bari and U.
of Bari, INFN-Frascati, INFN-Pavia, Torino U. and INFN, JLab, JSI (Slovenia), Lanzhou U, LBNL, Longwood U, LANL, MIT, Miss. State, New Mexico, ODU, Penn
State at Berks, Rutgers, Seoul Nat. U., St. Mary’s, Syracuse, Shandong U, Tel aviv, Temple, Tsinghua U, UConn, Glasgow, UIUC, Kentucky,
Maryland, UMass, New Hampshire, USTC, UVa
and the Hall A Collaboration
Strong theory support, Over 180 collaborators, 50 institutions,
8 countries, strong overlap with PVDIS CollaborationHall A Collaboration Meeting
Collaboration
Approved ExperimentsE12-10-006 (PAC35): Transversely pol. 3He, Collins, Sivers, PretzelosityE12-11-007 (PAC37): Longitudinally pol. 3He, Worm-gear TMDsRating and beam assignment in coming PAC38; new ideas/exp. coming See K. Allada Talk (Fri)
Jin Huang <[email protected]> 3
TMD PDFs link ◦ Intrinsic motion of partons ◦ Parton spin◦ Spin of the nucleon
Multi-Dimension structure◦ Probes orbital motion of quarks
A new phase of study, fast developing field◦ Great advance in theories (factorization, models,
Lattice ...)◦ Not sys. studied until recent years
Semi-Inclusive DIS (SIDIS): HERMES, COMPASS, Jlab-6GeV, ... p-p(p_bar) process : FNAL, BNL, ...
Hall A Collaboration Meeting
Transverse Momentum Dependent (TMD) Parton Distributions
in DISNucleon ->
Plate
Transverse motionPreserved
Jin Huang <[email protected]> 4
Quark polarization
Unpolarized(U)
Longitudinally Polarized (L)
Transversely Polarized (T)
Nucleon Polarization
U
L
T
Leading-Twist TMD PDFs
f1 =
f 1T =
Sivers
Helicity
g1 =
h1 =Transversity
h1 =
Boer-Mulders
h1T =
Pretzelosity
Hall A Collaboration Meeting
g1T =
Worm Gear
h1L =
Worm Gear(Kotzinian-Mulders)
Nucleon Spin
Quark Spin
Jin Huang <[email protected]> 5
Scattering Plane
Gold mine for TMDs Access all eight
leading-twist TMDs through spin-comb. & azimuthal-modulations
Hall A Collaboration Meeting
Tool: Semi-inclusive DIS (SIDIS)
P
xP
q, Q2
k
k’
Ph/z
W’
W
Jin Huang <[email protected]> 6
High 1036 N/cm2/spolarized luminosity
Achieved performance:◦ High polarization
> 60% achieved◦ Supports both
long. & trans. spin◦ Frequent spin flip
Hall A Collaboration Meeting
Polarized 3He Target
~90% ~1.5% ~8%
Effective pol. neutron target
Achieved: stable pol. 60% with spin flip
Jin Huang <[email protected]> 7
The SoLID Spectrometer
GEM: high rate tracking LC: In field calorimeter Cerenkov: PID MRPC: TOF, PID @ low p C: Calorimeter
Hall A Collaboration Meeting
e-
6.6º
13º
22º
12º
Large acceptance: enable 4D-mapping Full azimuthal angular coverage: small systematics Share hardware with PVDIS (N. Liyanage Talk Friday)
Jin Huang <[email protected]> 8
Phase space coverage Natural Extension of
E06-010 See A. Puckett talk, last session
Much wider phase space◦ Also data at low and
high z value to access target frag. and exclusive channels.
Both transverse and longitudinal polarized target.Study 6/8 leading twist TMDs
Hall A Collaboration Meeting
Jin Huang <[email protected]> 9
Transversity The third PDFs in addition to f1 and g1L
10% d quark tensor charge with world data Test Soffer’s inequality |h1T| <= (f1+g1L)/2 at large x
h1T =
Hall A Collaboration Meeting
Jin Huang <[email protected]> 10
Sivers Function Correlation between nucleon spin with quark angular
momentum Important test for factorization Different sign with twist-3 quark-gluon corr. dis. at high PT?
◦ Kang, Qiu, Vogelsang and Yuan: arxiv: 1103.1591◦ Search for sign change, also PT weighted moments (Boer, Gamberg,
Musch)
f 1T =
YD
qTSIDIS
qT ff
11
Hall A Collaboration Meeting
Jin Huang <[email protected]> 11
Worm-gear functions
Dominated by real part of interference between L=0 (S) and L=1 (P) states
No GPD correspondence Lattice QCD -> Moments of worm-gear TMDs Model Calculations -> h1L
=? -g1T
Connections with Collinear PDFs through WW approx. and LIR.
h1L =
g1T =
Worm Gear
Cent
er o
f poi
nts:
)()(~ 11 zHxhA LUL
Hall A Collaboration Meeting )()(~ 11 zDxgA TLT
Cent
er o
f poi
nts:
Jin Huang <[email protected]> 12
Map asymmetries in a 4-D (x, z, Q2, PT)
Hall A Collaboration Meeting
Jin Huang <[email protected]> 13
SIDIS Factorization Test at 11 GeV• Proton/deuteron/3He unpolarized data in a large phase space
coverage.• Understand SIDIS process (Factorization , PT dependence)
• Complementary to Hall B & C RSIDIS, PT dependence studies.
• Understand the Nuclear effect in the light nuclei.
Hall A Collaboration Meeting
Jin Huang <[email protected]> 14
Responsibilities CO2 gas Cerenkov detector: Temple U. Heavy Gas Cerenkov: Temple U. ECal: W&M, UMass, JLab, Rutgers, Syracuse GEM detectors:UVa, Miss State, W&M, Chinese
Collaboration (CIAE, Huangshan U, PKU, LZU, Tsinghua, USTC), UKY, Korean Collaboration (Seoul National U)
Scintillator: Chinese Cobllaboration, Duke MRPC: Tsinghua Univ., Duke Electronics: JLab DAQ: LANL, UVa and JLab Magnet: JLab and UMass Simulation: JLab and Duke Groups have experience with GEM already in China: IMP, Lanzhou U, Tsinghua U
Groups interested in GEM: USTC/Huangshan, Lanzhou U, CIAE, Shangdong U, Tsinghua U, PKU, and IMPUSTC: detectors, electronics and readoutMRPC: Tsinghua University
Blue: common withPVDISBlack: part in common with PVDISRed: This experiment only
See also N. Liyanage Talk FridayHall A Collaboration Meeting
Jin Huang <[email protected]> 15
Possible choices of magnets◦ BABAR, CLEO, CDF, ZEUS, Hall D, New design◦ Field and acceptance studied for the first four
GEMC based simulation framework◦ Allow for quantitative decisions on magnet acceptance◦ Rates/background studies ◦ see Z.W. Zhao’s talk (Friday)
Hall A Collaboration Meeting
Recent Progress I:Magnet Choices and Simulation Framework
BABAR
CLEOPlot by Z.W. Zhao
ZEUSCDF shown in page 7
Plot by Y. Zhang
Good progress with optics design◦ Near perfect optics eff. achieved with Winston cone + 6x6’’
det. Viable photo detectors
◦ Field-resistive PMTs or GEM-CsI detectors Next stage is R&D and prototyping.
Recent Progress II:Cerenkov Detector Design
Plots by S. Malace
•13.6’’ Winston cone•6x6’’ detector
Jin Huang <[email protected]> 17
GEM◦ R&D Efforts from UVa/INFN/JLab are combined with the
GEM R&D for the Super-BigBite & EIC◦ See talk by N. Liyanage (Friday)
EM calorimeters◦ Choices of Shashlik & SciFi (Pb or Fe) studied◦ The Shashlik design is more favored
MRPC◦ Onsite test in November
DAQ system ◦ Follows the Hall D path
Hall A Collaboration Meeting
Other Major Progress
Jin Huang <[email protected]> 18
Summary SIDIS is a powerful tool to study Parton dynamics in the
amplitude level (TMDs)◦ Spin-OAM correlation, flavor dependence etc.
SoLID is an ideal device to study SIDIS◦ High luminosity, large acceptance and full azimuthal coverage◦ Will provide ultimate precision (4-D) of SSA/DSA, at high-x
(valence), low Q2 region, which is crucial input to global analysis.
◦ Test SIDIS factorization, PT dependence at JLab12 (complementary to SIDIS programs in Hall B/C)
Integrated Effort in SoLID R&D with PVDIS◦ Steady progress◦ In preparation for the Director Review.
Hall A Collaboration Meeting