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Search for excited leptons in pp collisions at root s=7 TeV

Abstract: Results are presented of a search for compositeness in electrons and muons using a data sample of pp collisions at a center-of-mass energy ?s = 7 TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 5.0 fb?1. Excited leptons (?) are assumed to be produced via contact interactions in conjunction with a standard model lepton and to decay via ? ? ? , yielding a final state with two energetic leptons and a photon. The number of events observed in data is consistent with that expected from the standard model. The 95% confidence upper limits for the cross section for the production and decay of excited electrons (muons), with masses ranging from 0.6 to 2 TeV, are 1.48 to 1.24 fb (1.31 to 1.11 fb). Excited leptons with masses below 1.9 TeV are excluded for the case where the contact interaction scale equals the excited lepton mass. The limits on the cross sections are the most stringent ones published to date.

 Autoría: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Aguilo E., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hammer J., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Knünz V., Krammer M., Krätschmer I., Liko D., Mikulec I., Pernicka M., Rahbaran B., Rohringer C., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V

 Fuente: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2013, 720(4-5), 309-329

 Editorial: Elsevier

 Fecha de publicación: 01/03/2013

 Nº de páginas: 21

 Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.physletb.2013.02.031

 ISSN: 0370-2693,1873-2445

 Url de la publicación: https://doi.org/10.1016/j.physletb.2013.02.031

Autoría

CHATRCHYAN, SERGUEI

JAVIER ANDRES BROCHERO CIFUENTES

SHANHUEI CHUANG

MARTA FELCINI

MARCOS FERNANDEZ GARCIA

ALBERTO GRAZIANO

CLARA JORDA LOPE

MARIA AMPARO LOPEZ VIRTO

RAFAEL JOSE MARCO DE LUCAS

FRANCISCA JAVIELA MUÑOZ SANCHEZ

ANA YAIZA RODRIGUEZ MARRERO