Next-to-Leading-Order Predictions for t-Channel Single-Top Production at Hadron Colliders

被引：128

作者：

Campbell, J. M. ^{[1
]}

Frederix, R. ^{[2
,3
]}

Maltoni, F. ^{[3
]}

Tramontano, F. ^{[4
,5
]}

机构：

[1] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[2] CERN, PH Dept, Theory Grp, CH-1211 Geneva, Switzerland

[3] Catholic Univ Louvain, Ctr Particle Phys & Phenomenol CP3, B-1348 Louvain, Belgium

[4] Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy

[5] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 18期

关键词：

QUARK PRODUCTION;

D O I：

10.1103/PhysRevLett.102.182003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the predictions at next-to-leading order (NLO) in the strong coupling for the single-top cross section in the t channel at the Tevatron and the LHC. Our calculation starts from the 2 -> 3 Born amplitude gq -> tbq('), keeping the b-quark mass nonzero. A comparison is performed with a traditional NLO calculation of this channel based on the 2 -> 2 Born process with a bottom quark in the initial state. In particular, the effect of using kinematic approximations and resumming logarithms of the form log(Q(2)/m(b)(2)) in the 2 -> 2 process is assessed. Our results show that the 2 -> 3 calculation is very well behaved and in substantial agreement with the predictions based on the 2 -> 2 process.

引用

页数：4

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