transverse single-spin asymmetries from p↑ + p → jet + x and p↑ + p → jet + π± + x at √s = 500 gev at rhic
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ID: 236214
2014
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Abstract
Current extractions of Sivers and transversity functions come from measurements of transverse single-spin asymmetries (SSA) from SIDIS and fragmentation functions from lepton-lepton scattering. The limited kinematic reach leaves sizable uncertainty in model predictions. One way to extend knowledge to higher kinematics is through jet production from high-energy polarized-proton collisions. The STAR detector at RHIC has observed hints of non-zero SSA's for the Collins effect from p↑ + p → jet + π± + X at 0 < η < 1 and √s = 200 GeV. Extending transverse SSA measurements for the first time to mid-rapidity jet production at 500 GeV allows one to examine the Sivers and Collins effects for a different mix of partonic subprocesses. Moreover, the increased gluon participation allows a more favorable examination of the gluon Collins-like effect. Progress toward these first measurements will be shown.
| Reference Key |
j.l.2014epjtransverse
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|---|---|
| Authors | ;Drachenberg J.L. |
| Journal | utilitas mathematica |
| Year | 2014 |
| DOI |
10.1051/epjconf/20147302009
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