Same-sign top quarks as signature of light stops at the CERN LHC

Simple item page
dc.creatorKraml, S.
dc.creatorRaklev, A. R.
dc.date2005-12-21
dc.date2006-03-27
dc.date.accessioned2026-07-07T10:44:33Z
dc.date.available2026-07-07T10:44:33Z
dc.descriptionWe present a new method to search for a light scalar top with $m_{\tilde{t}_1}\lsim m_t$, decaying dominantly into a c-jet and the lightest neutralino, at the LHC. The principal idea is to exploit the Majorana nature of the gluino, leading to same-sign top quarks in events of gluino-pair production followed by gluino decays into top and stop. The resulting signature is 2 b-jets plus 2 same-sign leptons plus additional jets and missing energy. We perform a Monte Carlo simulation for a benchmark scenario, which is in agreement with the recent WMAP bound on the relic density of dark matter, and demonstrate that for $m_{\tilde{g}}\lsim 900$ GeV and $m_{\tilde{q}}>m_{\tilde{g}}$ the signal can be extracted from the background. Moreover, we discuss the determination of the stop and gluino masses from the shape of invariant-mass distributions. The derivation of the shape formulae is also given.
dc.description20 pages, 6 figures, minor changes; version to appear in PRD
dc.identifierhttps://arxiv.org/abs/hep-ph/0512284
dc.identifierhttp://arxiv.org/abs/hep-ph/0512284
dc.identifierPhys.Rev.D73:075002,2006
dc.identifierdoi:10.1103/PhysRevD.73.075002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182632
dc.subjectHigh Energy Physics - Phenomenology
dc.titleSame-sign top quarks as signature of light stops at the CERN LHC
dc.typetext

Files

Collections

arXiv