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 root 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.
|Titolo:||Signature-based search for delayed photons in exclusive photon plus missing transverse energy events from p(p)over-bar collisions with root s=1.96 TeV|
|Data di pubblicazione:||2013|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevD.88.031103|
|Appare nelle tipologie:||1.1 Articolo in rivista|