We present the first signature-based search for delayed photons using an exclusive photon plus missing transverse energy final state. Events are reconstructed in a data sample from the CDF II detector corresponding to 6.3 fb-1 of integrated luminosity from √s=1.96 TeV proton-antiproton collisions. Candidate events are selected if they contain a photon with an arrival time in the detector larger than expected from a promptly produced photon. The mean number of events from standard model sources predicted by the data-driven background model based on the photon timing distribution is 286±24. A total of 322 events are observed. A p value of 12% is obtained, showing consistency of the data with standard model predictions. © 2013 American Physical Society.
|Digital Object Identifier (DOI):||10.1103/PhysRevD.88.031103|
|Codice identificativo ISI:||WOS:000323572800001|
|Codice identificativo Scopus:||2-s2.0-84884564975|
|Titolo:||Signature-based search for delayed photons in exclusive photon plus missing transverse energy events from pp̄ collisions with √s=1.96 TeV|
|Appare nelle tipologie:||1.1 Articolo in rivista|