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Title: Search for heavy, long-lived particles that decay to photons at CDF II

Abstract

The authors present the first search for heavy, long-lived particles that decay to photons at a hadron collider. They use a sample of {gamma} + jet + missing transverse energy events in p{bar p} collisions at {radical}s = 1.96 TeV taken with the CDF II detector. Candidate events are selected based on the arrival time of the photon at the detector. Using an integrated luminosity of 570 pb{sup -1} of collision data, they observe 2 events, consistent with the background estimate of 1.3 {+-} 0.7 events. While the search strategy does not rely on model-specific dynamics, they set cross section limits in a supersymmetric model with {tilde {chi}}{sub 1}{sup 0} {yields} {gamma}{tilde G} and place the world-best 95% C.L. lower limit on the {tilde {chi}}{sub 1}{sup 0} mass of 101 GeV/c{sup 2} at {tau}{sub {tilde {chi}}{sub 1}{sup 0}} = 5 ns.

Authors:
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Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
902545
Report Number(s):
FERMILAB-PUB-07-075-E
arXiv eprint number arXiv:0704.0760; TRN: US200721%%592
DOE Contract Number:
AC02-07CH11359
Resource Type:
Journal Article
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CROSS SECTIONS; DECAY; FERMILAB COLLIDER DETECTOR; HADRONS; LUMINOSITY; PHOTONS; TRANSVERSE ENERGY; Experiment-HEP

Citation Formats

Abulencia, A., /Illinois U., Urbana, Adelman, J., /Chicago U., Affolder, T., /UC, Santa Barbara, Akimoto, T., /Tsukuba U., Albrow, M.G., /Fermilab, Amerio, S., /Padua U., Amidei, D., /Michigan U., Anastassov, A., /Rutgers U., Piscataway, Anikeev, K., /Fermilab, Annovi, A., /Frascati, Antos, J., and /Comenius U. /Tsukuba U. Search for heavy, long-lived particles that decay to photons at CDF II. United States: N. p., 2007. Web. doi:10.1103/PhysRevLett.99.121801.
Abulencia, A., /Illinois U., Urbana, Adelman, J., /Chicago U., Affolder, T., /UC, Santa Barbara, Akimoto, T., /Tsukuba U., Albrow, M.G., /Fermilab, Amerio, S., /Padua U., Amidei, D., /Michigan U., Anastassov, A., /Rutgers U., Piscataway, Anikeev, K., /Fermilab, Annovi, A., /Frascati, Antos, J., & /Comenius U. /Tsukuba U. Search for heavy, long-lived particles that decay to photons at CDF II. United States. doi:10.1103/PhysRevLett.99.121801.
Abulencia, A., /Illinois U., Urbana, Adelman, J., /Chicago U., Affolder, T., /UC, Santa Barbara, Akimoto, T., /Tsukuba U., Albrow, M.G., /Fermilab, Amerio, S., /Padua U., Amidei, D., /Michigan U., Anastassov, A., /Rutgers U., Piscataway, Anikeev, K., /Fermilab, Annovi, A., /Frascati, Antos, J., and /Comenius U. /Tsukuba U. Sun . "Search for heavy, long-lived particles that decay to photons at CDF II". United States. doi:10.1103/PhysRevLett.99.121801. https://www.osti.gov/servlets/purl/902545.
@article{osti_902545,
title = {Search for heavy, long-lived particles that decay to photons at CDF II},
author = {Abulencia, A. and /Illinois U., Urbana and Adelman, J. and /Chicago U. and Affolder, T. and /UC, Santa Barbara and Akimoto, T. and /Tsukuba U. and Albrow, M.G. and /Fermilab and Amerio, S. and /Padua U. and Amidei, D. and /Michigan U. and Anastassov, A. and /Rutgers U., Piscataway and Anikeev, K. and /Fermilab and Annovi, A. and /Frascati and Antos, J. and /Comenius U. /Tsukuba U.},
abstractNote = {The authors present the first search for heavy, long-lived particles that decay to photons at a hadron collider. They use a sample of {gamma} + jet + missing transverse energy events in p{bar p} collisions at {radical}s = 1.96 TeV taken with the CDF II detector. Candidate events are selected based on the arrival time of the photon at the detector. Using an integrated luminosity of 570 pb{sup -1} of collision data, they observe 2 events, consistent with the background estimate of 1.3 {+-} 0.7 events. While the search strategy does not rely on model-specific dynamics, they set cross section limits in a supersymmetric model with {tilde {chi}}{sub 1}{sup 0} {yields} {gamma}{tilde G} and place the world-best 95% C.L. lower limit on the {tilde {chi}}{sub 1}{sup 0} mass of 101 GeV/c{sup 2} at {tau}{sub {tilde {chi}}{sub 1}{sup 0}} = 5 ns.},
doi = {10.1103/PhysRevLett.99.121801},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}