| DATE: |
2005-08-05 14:00 - |
| PLACE: |
Kenkyu Honkan Rm. 321 |
| TITLE: |
QCD corrections to the dilepton production near partonic threshold in p\bar{p} collision |
| CONTACT: |
Tango |
| SPEAKER: |
Dr. Hiroshi Yokoya (Niigata Univ.) |
| LANGUAGE: |
Japanese |
| ABSTRACT: |
It has recently been suggested that collisions of transversely polarized protons and antiprotons at the GSI could be used to determine the nucleon's transversity densities from measurements of the double-spin asymmetry for the Drell-Yan process.
We investigate the QCD higher-order corrections, in this kinematic regime, in terms of available fixed-order contributions as well as of all-order soft-gluon resummations. We find these corrections are large, especially at large invariant mass regions.
We examine the resummation formula with physically motivated cut-off which keep it away from the region where non-peturbative dynamics take place. We find that this reduce the large enhancements, moderately at lower scale collision, but rather at higher scale collisions.
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