30th Winter Workshop on Nuclear Dynamics | |
Recent results of gluon and sea quark polarization measurements in polarized proton-proton collisions at STAR | |
Li, Xuan^1 | |
Physics Department, Temple University, 1900 North 13th street, Philadelphia | |
19122, United States^1 | |
关键词: Extended range; Internal structure; Momentum fraction; Polarized proton-proton collisions; Polarized protons; Single-spin asymmetries; Spin asymmetry; STAR experiment; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/535/1/012003/pdf DOI : 10.1088/1742-6596/535/1/012003 |
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来源: IOP | |
【 摘 要 】
The STAR experiment at RHIC is carrying out a comprehensive high-energy spin physics program to understand the internal structure and dynamics of the proton in polarized proton-proton collisions at √s = 200 GeV and √s = 500/510 GeV. STAR has the capability, with nearly full azimuthal coverage, to reconstruct leptons, hadrons and jets in the mid-rapidity region (|η| 2)/g(x,Q2)) to the proton spin for 0.05 +/?bosons at √s = 500/510 GeV in polarized proton-proton collisions provide a direct probe of the polarized anti-u and anti-d quark distributions (Δu¯(x,Q2), Δd¯(x,Q2)). These results better constrain the polarized gluon and sea quark distributions of the proton in the RHIC sensitive kinematic region. Future measurements with continuing high energy polarized proton-proton run at RHIC and detector upgrade will explore the gluonic contribution to the proton spin in extended range.
【 预 览 】
Files | Size | Format | View |
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Recent results of gluon and sea quark polarization measurements in polarized proton-proton collisions at STAR | 1189KB | download |