Bound-state effects on top quark production at hadron colliders

被引：77

作者：

Hagiwara, Kaoru ^{[2
]}

Surnino, Yukinari ^{[3
]}

Yokoya, Hiroshi ^{[1
]}

机构：

[1] CERN, Dept Phys, Theory Unit, CH-1211 Geneva, Switzerland

[2] KEK Theory Div & Sokendai, Tsukuba, Ibaraki 3050801, Japan

[3] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

来源：

PHYSICS LETTERS B | 2008年 / 666卷 / 01期

关键词：

D O I：

10.1016/j.physletb.2008.07.006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study bound-state effects on the t (t) over bar production cross section in the threshold region at hadron colliders. The bound-state effects are important particularly at the LHC where the gluon fusion is the dominant subprocess. Due to the formation of t (t) over bar resonances in the J = 0 color-singlet channel of gg -> t (t) over bar and the large width of the top quark, the t (t) over bar invariant-mass distribution peaks at a few GeV below the t (t) over bar threshold, and it is significantly enhanced over the naive NLO prediction until several GeV above the threshold. We present predictions of the t (t) over bar invariant-mass distribution which incorporate both the boundstate effects and initial-state radiations up to NLO. The bound-state effects would lead to a substantial deformation of top-quark kinematical distributions in the threshold region. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：71 / 76

页数：6

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