| 日時: |
2005-08-05 14:00 - |
| 場所: |
研究本館3階321号室 |
| 会議名: |
QCD corrections to the dilepton production near partonic threshold in p\bar{p} collision |
| 連絡先: |
丹後 |
| 講演者: |
横谷 洋氏 (新潟大学) |
| 講演言語: |
日本語 |
| アブストラクト: |
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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