Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5189
Title: Search for new physics with long-lived particles decaying to photons and missing energy in pp collisions at ?s=7 TeV
Authors: CMS Collaboration
Karapınar, Güler
Keywords: Photons
Particles(Nuclear physics)
Particle lifetime
Neutral particles
Missing energy
Publisher: Springer Verlag
Source: Chatrchyan, S, Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Aguilo, E., Bergauer, T., ...CMS Collaboration (2012). Search for new physics with long-lived particles decaying to photons and missing energy in pp collisions at √s=7 TeV. Journal of High Energy Physics, 2012(11). doi:10.1007/JHEP11(2012)172
Abstract: A search is performed for long-lived neutral particles decaying into a photon and invisible particles. An example of such a signature is the decay of the lightest neutralino with nonzero lifetime into a gravitino and a photon in gauge-mediated supersymmetry, with the neutralino as the next-to-lightest supersymmetric particle and the gravitino as the lightest. The search uses events containing photons, missing transverse energy, and jets. The impact parameter of the photon relative to the beam-beam collision point can be reconstructed using converted photons. The method is sensitive to lifetimes of the order of 0.1 to 1 ns. The data sample corresponds to an integrated luminosity of 2.23 fb-1 in pp collisions at √s=7 TeV, recorded in the first part of 2011 by the CMS experiment at the LHC. Cross-section limits are presented on pair production for such particles, each of which decays into a photon and invisible particles. The observed 95% confidence level limits vary between 0.11 and 0.21 pb, depending on the neutral particle lifetime.[Figure not available: see fulltext.] © 2012 CERN for the benefit of the CMS collaboration.
URI: http://doi.org/10.1007/JHEP11(2012)172
http://hdl.handle.net/11147/5189
ISSN: 1029-8479
Appears in Collections:Mathematics / Matematik
Rectorate / Rektörlük
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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