Special Supersymmetric features of large invariant mass unpolarized and polarized top-antitop production at LHC

We consider the top-antitop invariant mass distributions for production of unpolarized and polarized top quark pairs at LHC, in the theoretical framework of the MSSM. Assuming a "moderately" light SUSY scenario, we derive the leading logarithmic electroweak contributions at one loop in a r...

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Bibliographic Details
Published in:arXiv.org 2004-12
Main Authors: Beccaria, M, Bentvelsen, S, Cobal, M, Renard, F M, Verzegnassi, C
Format: Article
Language:English
Subjects:
Consistency tests
Invariants
Large Hadron Collider
Supersymmetry
Online Access:Get full text
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Summary:We consider the top-antitop invariant mass distributions for production of unpolarized and polarized top quark pairs at LHC, in the theoretical framework of the MSSM. Assuming a "moderately" light SUSY scenario, we derive the leading logarithmic electroweak contributions at one loop in a region of large invariant mass, \(M_{t\bar t}\simeq1\) TeV, for the unpolarized differential cross section \(d\sigma/dM_{t\bar t}\) and for the differential longitudinal top polarization asymmetry \(A_t(M_{t\bar t})\). We perform a realistic evaluation of the expected uncertainties of the two quantities, both from a theoretical and from an experimental point of view, and discuss the possibility of obtaining, from accurate measurements of the two mass distributions, stringent consistency tests of the model, in particular identifications of large \(\tan\beta\) effects.
ISSN:2331-8422
DOI:10.48550/arxiv.0412249