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Next-to-leading-order predictions for t-channel single-top production at hadron colliders

Campbell, J. M. ; Frederix, R. LU ; Maltoni, F. and Tramontano, F. (2009) In Physical Review Letters 102(18).
Abstract

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→tb̄q′, 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 (Q2/mb2) 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.

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author
; ; and
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
102
issue
18
article number
182003
publisher
American Physical Society
external identifiers
  • scopus:65549086945
ISSN
0031-9007
DOI
10.1103/PhysRevLett.102.182003
language
English
LU publication?
no
id
a05ff455-dc8a-40b6-ad0a-42a6a909b168
date added to LUP
2019-05-28 15:03:56
date last changed
2020-09-23 07:43:48
@article{a05ff455-dc8a-40b6-ad0a-42a6a909b168,
  abstract     = {<p>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→tb̄q′, 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 (Q2/mb2) 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.</p>},
  author       = {Campbell, J. M. and Frederix, R. and Maltoni, F. and Tramontano, F.},
  issn         = {0031-9007},
  language     = {eng},
  month        = {05},
  number       = {18},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Next-to-leading-order predictions for t-channel single-top production at hadron colliders},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.102.182003},
  doi          = {10.1103/PhysRevLett.102.182003},
  volume       = {102},
  year         = {2009},
}