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

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URI: https://hdl.handle.net/10902/28878
ISSN: 1550-7998
ISSN: 1550-2368
ISSN: 2470-0010
ISSN: 2470-0029
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Autoría
Aaltonen, Timo Antero; Casal Laraña, Bruno; Cuevas Maestro, Francisco Javier; Gómez Gramuglio, GervasioAutoridad Unican; Palencia Cortezón, José Enrique; Ruiz Jimeno, AlbertoAutoridad Unican; Scodellaro, LucaAutoridad Unican; Vilar Cortabitarte, RocíoAutoridad Unican; Vizán García, Jesús ManuelAutoridad Unican
Fecha
2013
Derechos
© 2013 American Physical Society
Publicado en
Physical Review D - Particles, Fields, Gravitation and Cosmology 2013, 88(3), 031103
Editorial
American Physical Society
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Resumen/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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