570 citations
- High Energy Accelerator Research OrganizationJP38 papers
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6 papers · 2 filters
Global NLO Analysis of Nuclear Parton Distribution Functions
M. Hirai, S. Kumano, T. -H. Nagai
Nuclear parton distribution functions (NPDFs) are determined by a global analysis of experimental measurements on structure-function ratios F_2^A/F_2^{A'} and Drell-Yan cross secti…
Transversely Polarized Drell-Yan Process and Soft Gluon Resummation in QCD
Hiroyuki Kawamura, Jiro Kodaira, Kazuhiro Tanaka
We calculate the transverse-momentum spectrum of the dilepton in the transversely polarized Drell-Yan process on the basis of the factorization theorem in QCD. We take into a…
Factorization and Gauge Invariance of Twist-3 Cross Section for Single Spin Asymmetry
Yuji Koike, Kazuhiro Tanaka
We prove factorization and gauge invariance of the twist-3 single-spin-dependent cross section in the leading order perturbative QCD, which was missing in the previous literature.…
Novel Master Formula for Twist-3 Soft-Gluon-Pole Mechanism to Single Transverse-Spin Asymmetry
Yuji Koike, Kazuhiro Tanaka
We prove that twist-3 soft-gluon-pole (SGP) cross section for single spin asymmetries is determined by a certain ``primordial'' twist-2 cross section up to kinematic and color fact…
Universal Structure of Twist-3 Soft-Gluon-Pole Cross Sections for Single Transverse-Spin Asymmetry
Yuji Koike, Kazuhiro Tanaka
We prove that twist-3 soft-gluon-pole (SGP) cross section for single spin asymmetries (SSA) is determined by a certain ``primordial'' twist-2 cross section up to kinematic and colo…
Soft gluon corrections to double transverse-spin asymmetries for small- dilepton production at RHIC and J-PARC
Hiroyuki Kawamura, Jiro Kodaira, Kazuhiro Tanaka
We calculate the double transverse-spin asymmetries, $\aqt$, in transversely polarized Drell-Yan process at the transverse-momentum of the produced lepton pair. We perform al…