Single transverse-spin asymmetry in high transverse momentum pion production inppcollisions
نویسندگان
چکیده
منابع مشابه
Single Transverse-Spin Asymmetry in Drell-Yan Production at Large and Moderate Transverse Momentum
We study the single-transverse spin asymmetry for the Drell-Yan process. We consider production of the lepton pair at large transverse momentum, q⊥ ∼ Q, where Q is the pair’s mass. The spin asymmetry is then of higher twist and may be generated by twist-three quark-gluon correlation functions. Expanding the result for q⊥ ≪ Q, we make contact with the transversemomentum-dependent QCD factorizati...
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We analyze single transverse-spin asymmetries for hadronic pion production at large transverse momenta using QCD factorization. In the large xF region, leading contributions to the asymmetries are naturally produced by twist-3 parton correlation functions that couple quark fields and gluon field strengths. With a simple model for these matrix elements, leading-order asymmetries calculated from ...
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The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL) has measured the single-spin transverse asymmetry (AN ) for neutral pion and non-identified charged hadron production at xF ∼ 0 over a transverse momentum range of ∼ 0.5 to 5.0 GeV/c from polarized proton-proton interactions at a center of mass energy ( √ s) of 200 GeV. The asymmetries ob...
متن کاملEstimate of a Chiral-Odd Contribution to Single Transverse-Spin Asymmetry in Hadronic Pion Production
We present an estimate of a chiral-odd contribution to the single transverse spin asymmetry in the large-pT pion production in the nucleon-nucleon collision. In this contribution the transversity distribution and the chiral-odd spin-independent twist-3 distribution appear. Because of the smallness of the corresponding hard cross section, this term turned out to be negligible in all kinematic re...
متن کاملChiral-Odd Contribution to Single-Transverse Spin Asymmetry in Hadronic Pion Production
A formula for the single transverse spin asymmetry in the large-pT pion production in the nucleon-nucleon collision is derived. We focuss on the chiral-odd contribution where the transversity distribution and the chiral-odd spin-independent twist-3 distribution contributes. This contribution is expected to give rise to a large effect at xF → −1. PACS numbers: 12.38.-t, 12.38.Bx, 13.85.Ni, 13.88...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2006
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.74.114013