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Special supersymmetric features of stop-chargino production at LHC
Beccaria M., Macorini G., Panizzi L., Renard F. M., Verzegnassi C.
http://hal.archives-ouvertes.fr/hal-00349202
Physique/Physique des Hautes Energies - Phénoménologie
Special supersymmetric features of stop-chargino production at LHC
M. Beccaria1, G. Macorini2, L. Panizzi2, Fernand Michel Renard ()3, C. Verzegnassi2
1 :  INFN, Sezione di Lecce - Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
http://www.le.infn.it/
INFN
Via Arnesano 73100 Lecce
Italie
2 :  INFN, Sezione di Trieste - Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
http://www.ts.infn.it/
INFN
Via Valerio, 2 34127 Trieste
Italie
3 :  LPTA - Laboratoire de Physique Théorique et Astroparticules
http://www.lpta.in2p3.fr/
CNRS : UMR5207 – IN2P3 – Université Montpellier II - Sciences et techniques
Bât 13- 1er Et. - CC 070 Place Eugène Bataillon 34095 MONTPELLIER CEDEX 5
France
The process of stop-chargino production at LHC has been calculated in the Minimal Supersymmetric Standard Model at the complete electroweak 1-loop level, assuming a mSUGRA symmetry breaking scheme. Several remarkable properties of the angular and invariant mass distributions of the basic $b~g\to\tilde{t}_a~ \chi^-_i$ amplitudes have been derived. For a vast collection of different benchmark points the overall 1-loop effects are of the order of a relative few percent. From a partial scanning of single parameters performed at Born level, a strong dependence of the rates on the stop mixing angle and a correlation with tanbeta have been evidentiated.
Anglais
24/12/2008

25 pages, 9 figures, minor changes, corrected typos
08-074

Lien vers le texte intégral : 
http://fr.arXiv.org/abs/0812.4375