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Title

Signature-based search for delayed photons in exclusive photon plus missing transverse energy events from pp collisions with √s=1.96  TeV

CollaborationWith : Clark, Allan Geoffrey / Lister, Alison / Wu, Xin
Published in Physical Review. D. 2013, vol. 88, no. 03, p. 031103
Abstract 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.
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CDF COLLABORATION. Signature-based search for delayed photons in exclusive photon plus missing transverse energy events from pp collisions with √s=1.96  TeV. In: Physical Review. D, 2013, vol. 88, n° 03, p. 031103. https://archive-ouverte.unige.ch/unige:38815

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Deposited on : 2014-07-22

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