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Journal Articles Physics Letters B Year : 2012

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

S. Chatrchyan , M. Besançon (1) , S. Choudhury (1) , M. Dejardin (1) , D. Denegri (1) , B. Fabbro (1) , J.L. Faure (1) , F. Ferri (1) , S. Ganjour (1) , A. Givernaud (1) , P. Gras (1) , G. Hamel de Monchenault (1) , P. Jarry (1) , E. Locci (1) , J. Malcles (1) , L. Millischer (1) , A. Nayak (1) , J. Rander (1) , A. Rosowsky (1) , I. Shreyber (1) , M. Titov (1) , S. Baffioni (2) , F. Beaudette (2) , L. Benhabib (2) , L. Bianchini (2) , M. Bluj (2) , C. Broutin (2) , Pierre Busson (2) , C. Charlot (2) , N. Daci (2) , T. Dahms (2) , M. Dalchenko (2) , L. Dobrzynski (2) , R. Granier de Cassagnac (2) , M. Haguenauer (2) , P. Mine (2) , C. Mironov (2) , I.N. Naranjo (2) , M. Nguyen (2) , C. Ochando (2) , P. Paganini (2) , D. Sabes (2) , R. Salerno (2) , Y. Sirois (2) , C. Veelken (2) , A. Zabi (2) , J.-L. Agram (3) , J. Andrea (3) , D. Bloch (3) , D. Bodin (3) , J.-M. Brom (3) , M. Cardaci (3) , E.C. Chabert (3) , C. Collard (3) , E. Conte (3) , F. Drouhin (3) , C. Ferro (3) , J.-C. Fontaine (3) , D. Gele (3) , U. Goerlach (3) , P. Juillot (3) , A.-C. Lebihan (3) , P. van Hove (3) , F. Fassi (4) , D. Mercier (4) , S. Beauceron (5) , N. Beaupere (5) , O. Bondu (5) , G. Boudoul (5) , J. Chasserat (5) , R. Chierici (5) , D. Contardo (5) , P. Depasse (5) , H. El Mamouni (5) , J. Fay (5) , S. Gascon (5) , M. Gouzevitch (5) , B. Ille (5) , T. Kurca (5) , M. Lethuillier (5) , L. Mirabito (5) , S. Perries (5) , L. Sgandurra (5) , V. Sordini (5) , Y. Tschudi (5) , P. Verdier (5) , S. Viret (5)
S. Chatrchyan
  • Function : Author
Pierre Busson
R. Granier de Cassagnac
C. Mironov
P. Paganini
J.-L. Agram
C. Collard
E. Conte
P. van Hove
D. Contardo
M. Gouzevitch
M. Lethuillier
V. Sordini
P. Verdier
S. Viret

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).

Dates and versions

in2p3-00763502 , version 1 (11-12-2012)

Identifiers

Cite

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, 2012, 722, pp.273-294. ⟨10.1016/j.physletb.2013.04.027⟩. ⟨in2p3-00763502⟩
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