Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-02-21
RIKEN Rev.28:105-109,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, 7 figures talk presented at Circum-Pan-Pacific RIKEN Symposium on ``High Energy Spin Physics'' Saitama, Japan, Novemb
Scientific paper
We study the time-reversal odd quark fragmentation function and its consequences on the hard processes. T-odd quark fragmentation function may arise, although QCD is T-invariant, from the non-perturbative dynamics in the fragmentation process. Assuming the factorization, we extract the T-odd fragmentation function from the inclusive pion production in the transversely polarized proton-proton collision. We then estimate the single spin asymmetry $A_{OT}$ of the semi-inclusive deep inelastic scattering with unpolarized lepton and the transversely polarized proton. We also discuss the meson cloud effects on the transversity distribution $h_1(x)$ of the nucleon. Asymmetry for the $\pi^-$ production is found to be much smaller than the naive expectation, since the $d$-quark transversity is considerably suppressed by the pion cloud effects
Suzuki Kaori
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