Transverse Spin Studies with STAR at RHIC
C.A. Gagliardi (for the STAR Collaboration)
TL;DR
This paper reports on measurements of transverse single-spin asymmetries in proton-proton collisions at RHIC, aiming to understand the underlying spin-momentum correlations and effects like Sivers and Collins.
Contribution
It presents new experimental data on transverse spin asymmetries and ongoing studies to distinguish between different underlying mechanisms at RHIC.
Findings
Observation of sizable asymmetries at forward rapidity
Ongoing measurements to identify Sivers effect in di-jet production
Insights into spin-momentum correlations in proton structure
Abstract
STAR has observed sizable transverse single-spin asymmetries for inclusive pi^0 production at forward rapidity in p+p collisions at sqrt{s}=200 GeV. These asymmetries may arise from either the Sivers or Collins effect. Studies are underway during the current RHIC run to elucidate the dynamics that underlie these single-spin asymmetries. Additional measurements are underway to search for the Sivers effect in mid-rapidity di-jet production.
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