Transverse single spin asymmetry for very forward π0 production in polarized proton-proton collisions at √s = 510 GeV
Transverse single spin asymmetry for very forward π0 production in polarized proton-proton collisions at √s = 510 GeV
复制标题
横向单自旋不对称性在 √s = 510 GeV 极化质子-质子碰撞中产生非常正向的 π0
DOI：
10.1051/epjconf/201920805007
复制
发表时间：
2019
影响因子：
--
通讯作者：
Tricomi A.
中科院分区：
文献类型：
--
作者：
Kim M. H.;Hong B.;Goto Y.;Nakagawa I.;Seidl R.;Park J. S.;Tanida K.;Itow Y.;Menjo H.;Sato K.;Ueno M.;Zhou Q. D.;Sako T.;Kasahara K.;Suzuki T.;Torii S.;Sakurai N.;Adriani O.;Bonechi L.;Berti E.;D'Alessandro R.;Tricomi A.
极化p + p碰撞产生π0的横向单自旋不对称性为理解π0的产生机制提供了新的信息。在微扰QCD框架中，用质子的部分子结构描述了3 < η < 4伪快度区的正π0。然而，最近的数据表明，可能的贡献不仅来自于局部相互作用，也来自于衍射相互作用。为了提供关于AN起源的新见解，我们测量了2017年RHIC中√s = 510 GeV极化p + p碰撞在6 < η赝快度区域的非常前向π0产生。本文报道了在横向动量0 < pT< 1 GeV/c范围内的极正π0的测量和初步结果。
Transverse single spin asymmetry, AN, of very forward π0production from polarized p + p collisions provides new information toward an understanding of its production mechanism. ANof forward π0in the pseudorapidity region of 3 < η < 4 has been described by the partonic structure of the proton in the perturbative QCD framework. However, recent data indicates a potential contribution from not only partonic but also diffractive interactions. In order to provide a new insight on the origin of the AN, we measured the very forward π0production in the pseudorapidity region of 6 < η from √s = 510 GeV polarized p + p collisions at RHIC in 2017. We report our measurement of the very forward π0over the transverse momentum range of 0 < pT< 1 GeV/c and the preliminary result.