Skip to Main content Skip to Navigation
Journal articles

Search for long-lived particles in events with photons and missing energy in proton-proton collisions at sqrt(s) = 7 TeV

Abstract : Results are presented from a search for long-lived neutralinos decaying into a photon and an invisible particle, a signature associated with gauge-mediated supersymmetry breaking in supersymmetric models. The analysis is based on a 4.9 inverse femtobarn sample of proton-proton collisions at sqrt(s) = 7 TeV, collected with the CMS detector at the LHC. The missing transverse energy and the time of arrival of the photon at the electromagnetic calorimeter are used to search for an excess of events over the expected background. No significant excess is observed, and lower limits at the 95% confidence level are obtained on the mass of the lightest neutralino, m(neutralino) > 220 GeV (for c tau<500 mm), as well as on the proper decay length of the lightest neutralino, c tau > 6000mm (for m(neutralino) < 150 GeV).
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00763502
Contributor : Sylvie Flores <>
Submitted on : Tuesday, December 11, 2012 - 7:33:28 AM
Last modification on : Wednesday, November 25, 2020 - 4:10:43 PM

Links full text

Identifiers

Citation

S. Chatrchyan, M. Besançon, S. Choudhury, M. Dejardin, D. Denegri, et al.. Search for long-lived particles in events with photons and missing energy in proton-proton collisions at sqrt(s) = 7 TeV. Physics Letters B, Elsevier, 2012, 722, pp.273-294. ⟨10.1016/j.physletb.2013.04.027⟩. ⟨in2p3-00763502⟩

Share

Metrics

Record views

512