CaltechAUTHORS
  A Caltech Library Service

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

Chatrchyan, S. and Apresyan, A. and Bornheim, A. and Chen, Y. and Di Marco, E. and Duarte, J. and Gataullin, M. and Ma, Y. and Mott, A. and Newman, H. B. and Rogan, C. and Spiropulu, M. and Timciuc, V. and Veverka, J. and Wilkinson, R. and Xie, S. and Yang, Y. and Zhu, R. Y. and Dias, F. A. and Dubinin, M. (2013) Search for long-lived particles in events with photons and missing energy in proton–proton collisions at √s = 7 TeV. Physics Letters B, 722 (4-5). pp. 273-294. ISSN 0370-2693. http://resolver.caltech.edu/CaltechAUTHORS:20130726-093221480

[img]
Preview
PDF - Published Version
Creative Commons Attribution.

818Kb
[img]
Preview
PDF - Submitted Version
See Usage Policy.

577Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20130726-093221480

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 > 220 GeV (for cτ < 500mm), as well as on the proper decay length of the lightest neutralino, cτ > 6000 mm (for m < 150 GeV).


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.physletb.2013.04.027DOIArticle
http://www.sciencedirect.com/science/article/pii/S0370269313003067PublisherArticle
http://arxiv.org/abs/1212.1838arXivDiscussion Paper
Additional Information:© 2013 CERN Published by Elsevier B.V. Received 8 December 2012. Received in revised form 4 April 2013. Accepted 8 April 2013. Available online 15 April 2013. Editor: M. Doser. This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited. We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MEYS (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON, RosAtom, RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter, IPST and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA).
Group:CMS@Caltech
Funders:
Funding AgencyGrant Number
BMWF and FWF (Austria)UNSPECIFIED
FNRS and FWO (Belgium) UNSPECIFIED
CNPq (Brazil)UNSPECIFIED
CAPES (Brazil)UNSPECIFIED
FAPERJ (Brazil)UNSPECIFIED
FAPESP (Brazil)UNSPECIFIED
MEYS (Bulgaria)UNSPECIFIED
CERNUNSPECIFIED
CASUNSPECIFIED
MoST (China)UNSPECIFIED
NSFC (China)UNSPECIFIED
COLCIENCIAS (Colombia)UNSPECIFIED
MSES (Croatia)UNSPECIFIED
RPF (Cyprus) UNSPECIFIED
MoERSF0690030s09
ERDF (Estonia)UNSPECIFIED
Academy of FinlandUNSPECIFIED
MEC (Finland)UNSPECIFIED
HIP (Finland)UNSPECIFIED
CEA and CNRS/IN2P3 (France)UNSPECIFIED
BMBF (Germany)UNSPECIFIED
DFG (Germany)UNSPECIFIED
HGF (Germany)UNSPECIFIED
GSRT (Greece)UNSPECIFIED
OTKA and NKTH (Hungary) UNSPECIFIED
DAE and DST (India) UNSPECIFIED
IPM (Iran)UNSPECIFIED
SFI (Ireland)UNSPECIFIED
INFN (Italy)UNSPECIFIED
NRF and WCU (Korea)UNSPECIFIED
LAS (Lithuania)UNSPECIFIED
CINVESTAV (Mexico)UNSPECIFIED
CONACyT (Mexico)UNSPECIFIED
SEP (Mexico)UNSPECIFIED
UASLP-FAI (Mexico)UNSPECIFIED
MSI (New Zealand)UNSPECIFIED
PAEC (Pakistan)UNSPECIFIED
MSHE and NSC (Poland)UNSPECIFIED
FCT (Portugal)UNSPECIFIED
JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan)UNSPECIFIED
MONUNSPECIFIED
RosAtom UNSPECIFIED
RAS and RFBR (Russia)UNSPECIFIED
MSTD (Serbia)UNSPECIFIED
SEIDI and CPAN (Spain)UNSPECIFIED
Swiss Funding Agencies (Switzerland)UNSPECIFIED
NSC (Taipei)UNSPECIFIED
ThEPCenterUNSPECIFIED
IPST and NSTDA (Thailand)UNSPECIFIED
TUBITAK and TAEK (Turkey) UNSPECIFIED
NASU (Ukraine)UNSPECIFIED
STFC (United Kingdom)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Subject Keywords: CMS; LHC; SUSY; Exotica; GMSB; Long-lived; Photons; Displaced
Record Number:CaltechAUTHORS:20130726-093221480
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130726-093221480
Official Citation:CMS Collaboration, Search for long-lived particles in events with photons and missing energy in proton–proton collisions at, Physics Letters B, Volume 722, Issues 4–5, 24 May 2013, Pages 273-294, ISSN 0370-2693, http://dx.doi.org/10.1016/j.physletb.2013.04.027. (http://www.sciencedirect.com/science/article/pii/S0370269313003067)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39609
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:26 Jul 2013 17:14
Last Modified:26 Jul 2013 17:14

Repository Staff Only: item control page