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


CDF Collaboration; et al; Canelli, F; Kilminster, B (2013). Signature-based search for delayed photons in exclusive photon plus missing transverse energy events from pp¯ collisions with s√=1.96 TeV. Physical Review D (Particles, Fields, Gravitation and Cosmology), 88(3):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.

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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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2013
Deposited On:20 Feb 2014 08:05
Last Modified:25 Feb 2018 14:59
Publisher:American Physical Society
ISSN:1550-2368
OA Status:Green
Publisher DOI:https://doi.org/10.1103/PhysRevD.88.031103

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