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Title: Search for new physics in lepton + photon + X events with 305 pb**-1 of p anti-p collisions at s**(1/2) = 1.96-TeV

Abstract

The authors present results of a search for anomalous production of events containing a charged lepton ({ell}, either e or {mu}) and a photon ({gamma}), both with high transverse momentum, accompanied by additional signatures, X, including missing transverse energy (E{sub T}) and additional leptons and photons. We use the same kinematic selection criteria as in a previous CDF search, but with a substantially larger data set, 305 pb{sup -1}, a p{bar p} collision energy of 1.96 TeV, and the upgraded CDF II detector. We find 42 {ell}{gamma}E{sub T} events versus a standard model expectation of 37.3 {+-} 5.4 events. The level of excess observed in Run I, 16 events with an expectation of 7.6 {+-} 0.7 events (corresponding to a 2.7{sigma} effect), is not supported by the new data. In the signature of {ell}{ell}{gamma} + X we observe 31 events versus an expectation of 23.0 {+-} 2.7 events. In this sample we find no events with an extra photon or E{sub T} and so find no events like the one ee{gamma}{gamma}E{sub T} event observed in Run I.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
897288
Report Number(s):
FERMILAB-PUB-06-127-E
Journal ID: ISSN 0031-9007; PRLTAO; arXiv eprint number hep-ex/0605097; TRN: US200711%%507
DOE Contract Number:
AC02-07CH11359
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys.Rev.Lett.97:031801,2006; Journal Volume: 97
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; FERMILAB COLLIDER DETECTOR; LEPTONS; PHOTONS; PHYSICS; PRODUCTION; STANDARD MODEL; TRANSVERSE ENERGY; TRANSVERSE MOMENTUM; Experiment-HEP

Citation Formats

Abulencia, A., Acosta, D., Adelman, Jahred A., Affolder, T., Akimoto, T., Albrow, M.G., Ambrose, D., Amerio, S., Amidei, D., Anastassov, A., Anikeev, K., and /Taiwan, Inst. Phys. /Argonne /Barcelona, IFAE /Baylor U. /INFN, Bologna /Bologna U. /Brandeis U. /UC, Davis /UCLA /UC, San Diego /UC, Santa Barbara. Search for new physics in lepton + photon + X events with 305 pb**-1 of p anti-p collisions at s**(1/2) = 1.96-TeV. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.97.031801.
Abulencia, A., Acosta, D., Adelman, Jahred A., Affolder, T., Akimoto, T., Albrow, M.G., Ambrose, D., Amerio, S., Amidei, D., Anastassov, A., Anikeev, K., & /Taiwan, Inst. Phys. /Argonne /Barcelona, IFAE /Baylor U. /INFN, Bologna /Bologna U. /Brandeis U. /UC, Davis /UCLA /UC, San Diego /UC, Santa Barbara. Search for new physics in lepton + photon + X events with 305 pb**-1 of p anti-p collisions at s**(1/2) = 1.96-TeV. United States. doi:10.1103/PhysRevLett.97.031801.
Abulencia, A., Acosta, D., Adelman, Jahred A., Affolder, T., Akimoto, T., Albrow, M.G., Ambrose, D., Amerio, S., Amidei, D., Anastassov, A., Anikeev, K., and /Taiwan, Inst. Phys. /Argonne /Barcelona, IFAE /Baylor U. /INFN, Bologna /Bologna U. /Brandeis U. /UC, Davis /UCLA /UC, San Diego /UC, Santa Barbara. Mon . "Search for new physics in lepton + photon + X events with 305 pb**-1 of p anti-p collisions at s**(1/2) = 1.96-TeV". United States. doi:10.1103/PhysRevLett.97.031801. https://www.osti.gov/servlets/purl/897288.
@article{osti_897288,
title = {Search for new physics in lepton + photon + X events with 305 pb**-1 of p anti-p collisions at s**(1/2) = 1.96-TeV},
author = {Abulencia, A. and Acosta, D. and Adelman, Jahred A. and Affolder, T. and Akimoto, T. and Albrow, M.G. and Ambrose, D. and Amerio, S. and Amidei, D. and Anastassov, A. and Anikeev, K. and /Taiwan, Inst. Phys. /Argonne /Barcelona, IFAE /Baylor U. /INFN, Bologna /Bologna U. /Brandeis U. /UC, Davis /UCLA /UC, San Diego /UC, Santa Barbara},
abstractNote = {The authors present results of a search for anomalous production of events containing a charged lepton ({ell}, either e or {mu}) and a photon ({gamma}), both with high transverse momentum, accompanied by additional signatures, X, including missing transverse energy (E{sub T}) and additional leptons and photons. We use the same kinematic selection criteria as in a previous CDF search, but with a substantially larger data set, 305 pb{sup -1}, a p{bar p} collision energy of 1.96 TeV, and the upgraded CDF II detector. We find 42 {ell}{gamma}E{sub T} events versus a standard model expectation of 37.3 {+-} 5.4 events. The level of excess observed in Run I, 16 events with an expectation of 7.6 {+-} 0.7 events (corresponding to a 2.7{sigma} effect), is not supported by the new data. In the signature of {ell}{ell}{gamma} + X we observe 31 events versus an expectation of 23.0 {+-} 2.7 events. In this sample we find no events with an extra photon or E{sub T} and so find no events like the one ee{gamma}{gamma}E{sub T} event observed in Run I.},
doi = {10.1103/PhysRevLett.97.031801},
journal = {Phys.Rev.Lett.97:031801,2006},
number = ,
volume = 97,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2006},
month = {Mon May 01 00:00:00 EDT 2006}
}
  • The authors present results of a search at CDF in 929 {+-} 56 pb{sup -1} of p{bar p} collisions at 1.96 TeV for the anomalous production of events containing a high-transverse momentum charged lepton ({ell}, either e or {mu}) and photon ({gamma}), accompanied by missing transverse energy (E{sub T}), and/or additional leptons and photons, and jets (X). They use the same selection criteria as in a previous CDF Run I search, but with an order-magnitude larger data set, a higher p{bar p} collisions energy, and the CDF II detector. They find 163 {ell}{gamma}E{sub T} + X events, compared to anmore » expectation of 150.6 {+-} 13.0 events. They observe 74 {ell}{ell}{gamma} + X events, compared to an expectation of 65.1 {+-} 7.7 events. They find no events similar to the Run II ee{gamma}{gamma}E{sub T} event.« less
  • We present results of a search for anomalous production of events containing a charged lepton (l, either e or {mu}) and a photon ({gamma}), both with high transverse momentum, accompanied by additional signatures X, including missing transverse energy (Ee{sub T}) and additional leptons and photons. We use the same selection criteria as in a previous CDF search but with a substantially larger data set, 305 pb{sup -1}, a pp collision energy of 1.96 TeV, and the CDF II detector. We find 42 l{gamma}Ee{sub T} events versus an expectation of 37.3{+-}5.4 events. We observe 31 ll{gamma}+X events versus an expectation ofmore » 23.0{+-}2.7 events. We find no events similar to the run I ee{gamma}{gamma}Ee{sub T} event.« less
  • The authors present results of a search in 929 {+-} 56 pb{sup -1} of p{bar p} collisions at 1.96 TeV for the anomalous production of events containing a charged lepton ({ell}, either e or {mu}) and a photon ({gamma}), both with high transverse momentum, accompanied by additional signatures, X, including missing transverse energy (E{sub T}) and additional leptons and photons. They use the same selection criteria as in the previous CDF Run I search, but with an order-magnitude larger data set, a higher p{bar p} collision energy, and the CDF II detector.
  • We present results of a search at CDF in 929{+-}56 pb{sup -1} of pp collisions at 1.96 TeV for the anomalous production of events containing a high-transverse momentum charged lepton (l, either e or {mu}) and photon ({gamma}), accompanied by missing transverse energy (Ee{sub T}), and/or additional leptons and photons, and jets (X). We use the same selection criteria as in a previous CDF Run I search, but with an order-magnitude larger data set, a higher pp collision energy, and the CDF II detector. We find 163 l{gamma}Ee{sub T}+X events, compared to an expectation of 150.6{+-}13.0 events. We observe 74more » ll{gamma}+X events, compared to an expectation of 65.1{+-}7.7 events. We find no events similar to the Run I ee{gamma}{gamma}Ee{sub T} event.« less
  • No abstract prepared.