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Título

Search for heavy long-lived charged particles in pp collisions at √s=7 TeV

Autor Chatrchyan, S.; Brochero Cifuentes, J. A. ; Cabrillo, I. J. ; Cabrillo, I. J. ; Calderon, Alicia; Chuang, S. H. ; Duarte Campderros, J. ; Felcini, Marta ; Fernández, M. ; Gómez, G. ; González Sánchez, J. ; Jorda, C. ; Lobelle Pardo, P. ; López Virto, A. ; Marco, Jesús ; Marco, Rafael ; Martínez-Rivero, Celso ; Matorras, Francisco ; Muñoz Sánchez, F. J. ; Rodrigo, Teresa ; Rodríguez Marrero, Ana Y. ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Sobron Sañudo, M. ; Vila, Iván ; Vilar, Rocío ; CMS Collaboration
Fecha de publicación 2012
EditorElsevier
Citación Physics Letters B 713(4-5): 408-433 (2012)
ResumenThe result of a search for heavy long-lived charged particles produced in pp collisions at √s=7 TeV at the LHC is described. The data sample has been collected using the CMS detector and corresponds to an integrated luminosity of 5.0 fb -1. The inner tracking detectors are used to define a sample of events containing tracks with high momentum and high ionization energy loss. A second sample of events, which have high-momentum tracks satisfying muon identification requirements in addition to meeting high-ionization and long time-of-flight requirements, is analyzed independently. In both cases, the results are consistent with the expected background estimated from data. The results are used to establish cross section limits as a function of mass within the context of models with long-lived gluinos, scalar top quarks and scalar taus. Cross section limits on hyper-meson particles, containing new elementary long-lived hyper-quarks predicted by a vector-like confinement model, are also presented. Lower limits at 95% confidence level on the mass of gluinos (scalar top quarks) are found to be 1098 (737) GeV/c 2. A limit of 928 (626) GeV/c 2 is set for a gluino (scalar top quark) that hadronizes into a neutral bound state before reaching the muon detectors. The lower mass limit for a pair produced scalar tau is found to be 223 GeV/c 2. Mass limits for a hyper-kaon are placed at 484, 602, and 747 GeV/c 2 for hyper-ρ masses of 800, 1200, and 1600 GeV/c 2, respectively. © 2012 CERN.
Descripción This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0.-- et al.
Versión del editorhttp://dx.doi.org/10.1016/j.physletb.2012.06.023
URI http://hdl.handle.net/10261/109066
DOI10.1016/j.physletb.2012.06.023
Identificadoresdoi: 10.1016/j.physletb.2012.06.023
issn: 0370-2693
Aparece en las colecciones: (IFCA) Artículos
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