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Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector SEARCH for NONPOINTING and DELAYED PHOTONS in ⋯ G. AAD et al

Aad G.
•
Abbott B.
•
Abdallah J.
altro
Zwalinski L.
2015
  • journal article

Periodico
PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY
Abstract
A search has been performed, using the full 20.3 fb(-1) data sample of 8 TeV proton-proton collisions collected in 2012 with the ATLAS detector at the LHC, for photons originating from a displaced vertex due to the decay of a neutral long-lived particle into a photon and an invisible particle. The analysis investigates the diphoton plus missing transverse momentum final state, and is therefore most sensitive to pair production of long-lived particles. The analysis technique exploits the capabilities of the ATLAS electromagnetic calorimeter to make precise measurements of the flight direction, as well as the time of flight, of photons. No excess is observed over the Standard Model predictions for background. Exclusion limits are set within the context of gauge mediated supersymmetry breaking models, with the lightest neutralino being the next-to-lightest supersymmetric particle and decaying into a photon and gravitino with a lifetime in the range from 250 ps to about 100
DOI
10.1103/PhysRevD.90.112005
WOS
WOS:000346096000001
Archivio
http://hdl.handle.net/11390/1097492
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84919401685
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84952026342&partnerID=40&md5=37fa0757407bcbf223a7ade714316233
Diritti
metadata only access
Scopus© citazioni
53
Data di acquisizione
Jun 2, 2022
Vedi dettagli
Web of Science© citazioni
55
Data di acquisizione
Mar 28, 2024
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