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arXiv 1005.0347hep-phhep-ex
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顶夸克对产生中的自旋关联效应

Spin Correlation Effects in Top Quark Pair Production

Stephen J. Parke

摘要:

本文分析了强子对撞机上顶夸克对产生中的自旋关联效应,重点讨论了大型强子对撞机(LHC)上的顶夸克对产生。在大型强子对撞机上,顶夸克对的产生主要是由胶子-胶子融合产生的。对于高能胶子-胶子熔合,产生过程主要是异螺旋胶子熔合,它与夸克-反夸克湮灭具有相同的自旋关联。在低能量下,产生的主导作用是类螺旋胶子融合,这赋予了顶夸克对衰变中的双轻子衰变产物非常强的方位角关联。详细研究了这一产生过程,这为在LHC上寻找顶夸克对产生中的自旋关联提供了一种新的途径。

英文摘要:

An analysis of the spin correlation effects in top quark pair production at hadron colliders is presented with special emphasis for the Large Hadron Collider (LHC). At the LHC top quark pair production is dominated by gluon-gluon fusion. For gluon-gluon fusion at high energies the production is dominated by unlike helicity gluon fusion which has the same spin correlations as quark-antiquark annihilation. At low energies the production is dominated by like helicity gluon fusion which imparts very strong azimuthal correlations on the di-lepton decay products in top quark pair decay. This production process is studied in detail and this suggest a new way to look for spin correlations in top quark pair production at the LHC.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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