Search for long-lived particles in events with photons and missing energy in proton–proton collisions at [Formula presented] TeV

  • CMS Collaboration

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

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 4.9fb−1 sample of proton-proton collisions at s=7TeV, 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>220GeV (for cτ<500mm), as well as on the proper decay length of the lightest neutralino, cτ>6000mm (for m<150GeV).

Lingua originaleInglese
pagine (da-a)273-294
Numero di pagine22
RivistaPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume722
Numero di pubblicazione4-5
DOI
Stato di pubblicazionePubblicato - 24 mag 2013

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