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Theoretical Update of Twist-3 Single-Spin Asymmetry in Semi-Inclusive DIS
Yuji Koike, Kazuhiro Tanaka
We discuss the single-spin asymmetry in semi-inclusive DIS, , based on the twist-3 mechanism in the collinear factorization relevant for the pion production…
OPE for B-meson distribution amplitude and dimension-5 HQET operators
Hiroyuki Kawamura, Kazuhiro Tanaka
The -meson light-cone distribution amplitude (LCDA) is defined as the matrix element of a quark-antiquark bilocal light-cone operator in the heavy-quark effective theory (HQET)…
Double Transverse-Spin Asymmetries for Drell-Yan Process in pp and p\bar{p} Collisions: Role of Nonleading QCD Corrections at Small Transverse Momentum
Hiroyuki Kawamura, Kazuhiro Tanaka
We discuss the double-spin asymmetries in transversely polarized Drell-Yan process, calculating all-order gluon resummation corrections up to the next-to-leading logarithmic accura…
The OPE of the B-meson light-cone wavefunction for exclusive B decays: radiative corrections and higher-dimensional operators
Hiroyuki Kawamura, Jiro Kodaira, Kazuhiro Tanaka
We discuss the B-meson light-cone wavefunction relevant for QCD factorization approach for exclusive B-meson decays. We derive the operator product expansion for the B-meson light-…
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.…