首页> 外文期刊>Physical review letters >Nuclear Dependence of the Transverse Single-Spin Asymmetry in the Production of Charged Hadrons at Forward Rapidity in Polarized p +p, p + Al, and p + Au Collisions at √S_(NN) = 200 GeV
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Nuclear Dependence of the Transverse Single-Spin Asymmetry in the Production of Charged Hadrons at Forward Rapidity in Polarized p +p, p + Al, and p + Au Collisions at √S_(NN) = 200 GeV

机译:在√S_(NN)= 200 GeV极化p + p,p + Al和p + Au碰撞中以正向速度在带电强子的产生中横向单旋不对称的核依赖性。

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摘要

We report on the nuclear dependence of transverse single-spin asymmetries (TSSAs) in the production of positively charged hadrons in polarized p(up arrow) + p, p(up arrow) + Al, and p(up arrow) + Au collisions at root s(NN) = 200 GeV. The measurements have been performed at forward rapidity (1.4 < eta < 2.4) over the range of transverse momentum (1.8 < p(T) < 7.0 GeV/c) and Feynman x (0.1 < x(F) < 0.2). We observed positive asymmetries for positively charged hadrons in p(up arrow) + p collisions, and significantly reduced asymmetries in p(up arrow) + A collisions. These results reveal a nuclear dependence of TSSAs for charged-hadron production in a regime where perturbative techniques are applicable. These results provide new opportunities to use p(up arrow) + A collisions as a tool to investigate the rich phenomena behind TSSAs in hadronic collisions and to use TSSAs as a new handle in studying small-system collisions.
机译:我们报告了在极化p(向上箭头)+ p,p(向上箭头)+ Al,和p(向上箭头)+ Au碰撞中产生带正电的强子中横向单旋不对称性(TSSAs)的核依赖性根s(NN)= 200 GeV。在横向动量(1.8 (T)<7.0 GeV / c)和费曼x(0.1

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