eic sidis simulation study at duke - indico.bnl.gov
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EIC SIDIS simulation study at Duke
EIC Yellow Report SIDIS working group meetingDuke University
Xiaqing LiApril 6 2020
0
SIDIS @ EIC requirements• A variable – low to moderately high – center of mass energy (Ecm)• Kinematic coverage: from JLab 12 GeV (also HERMES & COMPASS) valence
quark region to EIC sea quark/gluon region• High luminosity• Extractions of TMDs rely on high-precision multidimensional bins
• Factorization, transition from low-Pt to high-Pt• Q2 evolution• Model dependence• …
• High statistics allow to reduce certain systematic uncertainties (radiative corrections, model dependence, etc.)
• Simulations conducted with various Ecm values and high luminosity
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Overview of the simulation parameters
• SIDIS event generator: updated version of the SoLID SIDIS generator• Integrated luminosity: 1×10!" 𝑐𝑚#$ (100 𝑓𝑏#")• Cuts applied:
• 0.05 < y < 0.8• W > 2.3 GeV• Mx > 1.6 GeV• 0.7 GeV < Ph < 10 GeV• Pe > 0.7 GeV• 2.5° < θe < 150°
• Polarization of proton beam = 80%• Combined detection efficiency = 50%
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EIC SIDIS statistical projections on single spin asymmetry of π+
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EIC SIDIS statistical projections on single spin asymmetry of π+
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Comparison of different (Ee + Ep) configurations for Ecm = 51 GeV
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= 75 GeV)s8 + 176 GeV ( = 75 GeV)s11 + 128 GeV (
= 75 GeV)s16 + 88 GeV (
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10
210
x-310 -210 -110 1
+ pA
sym
met
ery
-0.1
0
0.1
-3 -2.5 -2 -1.5 -1 -0.5 0
0
0.5
1
1.5
2
2.5
)2 (G
eV2
Q
1
10
210
x-310 -210 -110 1
+ pA
sym
met
ery
-0.1
0
0.1
Comparison of different (Ee + Ep) configurations for Ecm = 75 GeV
9
Takeaway: the low Ecm curve for luminosity is highly favored for the EIC SIDIS study
0.01
0.1
1
10
100
0 40 80 120
Spin and Flavor Structure of the Nucleon and Nuclei
QCD at Extreme Parton Densities-
Saturation
Tomography (p/A)100
10
1
Center of Mass Energy Ecm [GeV]
Peak
Lum
inos
ity [c
m-2
s-1]
Annu
al In
tegr
ated
Lum
inos
ity [f
b-1 ]
1034
1033
1032
EICOptimization for high Ecm
Internal Landscape of the Nucleus
EICOptimization for low Ecm
150
Figure from F. Willeke’s slides at EICUG Temple Meeting, Mar 18, 2020
Important for SIDIS