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We study the contribution of the collinear twist-3 quark-gluon correlation to the single transverse-spin asymmetry in direct-photon and single-jet productions in pp collision. At typical RHIC kinematics we find sizable asymmetries in the…

High Energy Physics - Phenomenology · Physics 2012-12-03 Koichi Kanazawa , Yuji Koike

We calculate the single-spin-dependent cross section formula for the D-meson production and the direct-photon production in the pp collision induced by the twist-3 triple-gluon correlation functions in the transversely polarized nucleon. We…

High Energy Physics - Phenomenology · Physics 2011-07-05 Yuji Koike , Shinsuke Yoshida

We study the single transverse-spin asymmetry for the inclusive open-charm production in the pp-collision, p^\uparrow p\to DX, induced by the three-gluon correlation functions in the polarized nucleon. We derive the corresponding twist-3…

High Energy Physics - Phenomenology · Physics 2011-08-09 Yuji Koike , Shinsuke Yoshida

We study the single transverse-spin asymmetry for inclusive light-hadron productions in the proton-proton collision, $\pphx$ ($h=\pi,K,\eta$), for the RHIC kinematics based on the twist-3 mechanism in the collinear factorization. The…

High Energy Physics - Phenomenology · Physics 2011-06-24 Koichi Kanazawa , Yuji Koike

We calculate the single transverse-spin asymmetry for open charm production in $pp$ collisions within the QCD collinear factorization approach. We include contributions from both twist-three quark-gluon and tri-gluon correlation functions.…

High Energy Physics - Phenomenology · Physics 2008-12-30 Zhong-Bo Kang , Jian-Wei Qiu , Werner Vogelsang , Feng Yuan

We derive the single-spin-dependent cross section for the Drell-Yan lepton-pair production and the direct-photon production in the $pp$-collision induced by the twist-3 three-gluon correlation functions in the transversely polarized nucleon…

High Energy Physics - Phenomenology · Physics 2015-06-03 Yuji Koike , Shinsuke Yoshida

We present our results for the twist-3 gluon contribution to the single transverse-spin asymmetry(SSA) in $J/\psi$ production in proton-proton collisions. Although the data were reported by the RHIC experiment more than a decade ago, a…

High Energy Physics - Phenomenology · Physics 2026-05-20 Longjie Chen , Shinsuke Yoshida

We study the single spin asymmetries for the $D$-meson production, Drell-Yan lepton-pair production and the direct-photon production in the $pp$ collision induced by the twist-3 three-gluon correlation functions in the transversely…

High Energy Physics - Phenomenology · Physics 2015-06-03 Yuji Koike , Shinsuke Yoshida

In the collinear twist-three approach, we calculate for the first time the gluon contribution to double (longitudinal-transverse) spin asymmetry A_{LT} for open charm production in proton-proton collisions measurable at RHIC. Utilizing the…

High Energy Physics - Phenomenology · Physics 2013-09-10 Yoshitaka Hatta , Koichi Kanazawa , Shinsuke Yoshida

We study the single-transverse spin asymmetry for open charm production in the semi-inclusive lepton-hadron deep inelastic scattering. We calculate the asymmetry in terms of the QCD collinear factorization approach for $D$ mesons at high…

High Energy Physics - Phenomenology · Physics 2008-11-26 Zhong-Bo Kang , Jian-Wei Qiu

We study the twist-three fragmentation function contribution to the single transverse spin asymmetries in inclusive hadron production in pp collisions, pp->h+X. In particular, we evaluate the so-called derivative contribution which…

High Energy Physics - Phenomenology · Physics 2014-11-20 Zhongbo Kang , Feng Yuan , Jian Zhou

We present a new analysis for the single-transverse spin asymmetry (SSA) for the inclusive pion and kaon productions in the proton-proton collisions measured at RHIC. The framework we use is the collinear factorization in which SSA appears…

High Energy Physics - Phenomenology · Physics 2015-05-20 Koichi Kanazawa , Yuji Koike

We study the single transverse-spin asymmetry for the inclusive direct-photon and single-jet productions in the proton-proton collision based on the twist-3 mechanism in the collinear factorization. Taking into account all the effects from…

High Energy Physics - Phenomenology · Physics 2015-06-12 Koichi Kanazawa , Yuji Koike

Single spin asymmetry (SSA) is a twist-3 observable in the collinear factorization approach. We present a twist-3 single-spin-dependent cross section formula for the pion production in pp-collision, p^\uparrow p\to\pi X, relevant to RHIC…

High Energy Physics - Phenomenology · Physics 2009-08-24 Yuji Koike , Tetsuya Tomita

We analyze the single transverse-spin asymmetry (SSAs) for inclusive hadron production in the $pp$ collision at RHIC based on the twist-3 mechanism in QCD. As an origin of SSAs, we take into account of all kinds of pole contributions…

High Energy Physics - Phenomenology · Physics 2014-11-21 Koichi Kanazawa , Yuji Koike

As a possible source of the single transverse spin asymmetry, we study the contribution from purely gluonic correlation represented by the twist-3 ``three-gluon correlation" functions in the transversely polarized nucleon. We first define a…

High Energy Physics - Phenomenology · Physics 2014-11-21 Hiroo Beppu , Yuji Koike , Kazuhiro Tanaka , Shinsuke Yoshida

We derive a "master formula" for the contribution of the three-gluon correlation function in the nucleon to the twist-3 single-spin-dependent cross section for semi-inclusive deep-inelastic scattering, ep^\uparrow\to eDX. This is an…

High Energy Physics - Phenomenology · Physics 2011-06-24 Yuji Koike , Kazuhiro Tanaka , Shinsuke Yoshida

We study the single transverse-spin asymmetry for open charm production in the semi-inclusive lepton-hadron deep inelastic scattering (SIDIS) and $pp$ collision. Within collinear factorization approach, we find that the asymmetry is…

High Energy Physics - Phenomenology · Physics 2009-08-24 Zhong-Bo Kang , Jian-Wei Qiu

We study the single spin asymmetry (SSA) induced by purely gluonic correlation inside a nucleon, in particular, by the three-gluon correlation functions in the transversely polarized nucleon, $p^\uparrow$. This contribution is embodied as a…

High Energy Physics - Phenomenology · Physics 2015-05-20 Hiroo Beppu , Yuji Koike , Kazuhiro Tanaka , Shinsuke Yoshida

We compute the twist-three fragmentation contribution to the transverse single spin asymmetry (SSA) in light hadron production $p^\uparrow p\to hX$ and $p^\uparrow A\to hX$ including the gluon saturation effect in the unpolarized…

High Energy Physics - Phenomenology · Physics 2017-01-18 Yoshitaka Hatta , Bo-Wen Xiao , Shinsuke Yoshida , Feng Yuan
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