A signature-based search for delayed photons in exclusive photon plus missing transverse energy events from $p \bar{p}$ collisions with $\sqrt{s} = 1.96$ TeV

Journal article

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 $6.3 \text{fb}^{-1}$ of integrated luminosity from $\sqrt{s}=1.96$ 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 $286 \pm 24$. A total of 322 events are observed. A $p$-value of 12% is obtained, showing consistency of the data with standard model predictions.

Authors: Collaboration, CDF; Aaltonen, T; Amerio, S; Amidei, D; Anastassov, A

• Publication status: Published
• Journal: Phys. Rev. D
• Volume: 88
• Issue: 3
• Pages: 031103
• Publication date: 2013-07-01
• DOI: 10.1103/PhysRevD.88.031103
• EISSN: 1550-2368
• ISSN: 1550-7998
• Language: English
• Keywords: hep-ex