The European Physical Journal C (EPJ C)

Issue		Eur. Phys. J. C Volume 53, Number 2, January 2008
Page(s)		257 - 265
DOI		10.1140/epjc/s10052-007-0452-y
Published online		10 November 2007

Eur. Phys. J. C 53, 257-265 (2008)
DOI: 10.1140/epjc/s10052-007-0452-y

A complete one-loop description of associated tW production at LHC and an estimate of possible genuine supersymmetric effects

M. Beccaria^{1, 2}, C.M. Carloni Calame³, G. Macorini^{4, 5}, G. Montagna^{6, 7}, F. Piccinini^{6, 7}, F.M. Renard⁸ and C. Verzegnassi^{4, 5}

¹ Dipartimento di Fisica, Università del Salento, Salento, Italy
² INFN, Sezione di Lecce, Lecce, Italy
³ School of Physics & Astronomy, Southampton University, Southampton, UK
⁴ Dipartimento di Fisica Teorica, Università di Trieste, Trieste, Italy
⁵ INFN, Sezione di Trieste, Trieste, Italy
⁶ Dipartimento di Fisica Nucleare e Teorica, Università di Pavia, Pavia, Italy
⁷ INFN, Sezione di Pavia, Via A. Bassi 6, 27100, Pavia, Italy
⁸ Laboratoire de Physique Théorique et Astroparticules, Université Montpellier II, Montpellier, France

guido.montagna@pv.infn.it

(Received 18 June 2007 / Published online 10 November 2007)

Abstract

We compute, in the MSSM framework, the sum of the one-loop electroweak and of the total QED radiation effects for the process $pp \to t W+X$ , initiated by the parton process $bg\to tW$ . Combining these terms with the existing NLO calculations of SM and SUSY QCD corrections, we analyze the overall one-loop supersymmetric effects on the partial rates of the process, obtained by integrating the differential cross section up to a final variable invariant mass. We conclude that, for some choices of the SUSY parameters and for relatively small final invariant masses, they could reach the relative ten percent level, possibly relevant for a dedicated experimental effort at LHC.

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