The role of the top mass in b-production at future lepton colliders

We compute the one loop contribution coming from vertex and box diagrams, where virtual top quarks are exchanged, to the asymptotic energy behaviour of \(b\bar b\) pair production at future lepton colliders. We find that the effect of the top mass is an extra linear logarithmic term of Sudakov type...

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Bibliographic Details
Published in:arXiv.org 1999-09
Main Authors: Beccaria, M, Ciafaloni, P, Comelli, D, Renard, F M, Verzegnassi, C
Format: Article
Language:English
Subjects:
Asymptotic properties
Leptons
Pair production
Online Access:Get full text
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Summary:We compute the one loop contribution coming from vertex and box diagrams, where virtual top quarks are exchanged, to the asymptotic energy behaviour of \(b\bar b\) pair production at future lepton colliders. We find that the effect of the top mass is an extra linear logarithmic term of Sudakov type that is not present in the case of (u,d,s,c) production. This appears to be particularly relevant in the case of the \(b\bar{b}\) cross section.
ISSN:2331-8422
DOI:10.48550/arxiv.9907389