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Search for pair production of first-generation leptoquarks in pp-bar collisions at sq root(s)=1.96 TeV

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Abstract

A search for pair production of first-generation leptoquarks (LQ) is performed with data collected by the DO experiment in pp-bar collisions at sq root(s)=1.96 TeV at the Fermilab Tevatron Collider. In a sample of data corresponding to approx1 fb{sup -1} the search has been performed on the final states with two electrons and two jets or one electron, two jets and missing transverse energy. We find our data consistent with standard model expectations. The results are combined with those found in a previous analysis of events with two jets and missing transverse energy to obtain scalar LQ mass limits. We set 95% C.L. lower limits on a scalar LQ mass of 299 GeV, 284 GeV and 216 GeV for beta=1, beta=0.5 and beta=0.02 respectively, where beta is the LQ branching ratio in the eq channel. This improves the results obtained with a lower luminosity sample from Run II of the Tevatron. Lower limits on vector LQ masses with different couplings from 357 GeV to 464 GeV for beta=0.5 are also set using this analysis.
Authors:
Abazov, V M; [1]  Abbott, B; [2]  Abolins, M; [3]  Acharya, B S; [4]  Adams, M; [5]  Adams, T; [6]  Aguilo, E; [7]  Ahsan, M; [8]  Alexeev, G D; [1]  Alkhazov, G; [9]  Alton, A; [10]  Alverson, G; [11]  Alves, G A; [12]  Ancu, L S; [13]  Andeen, T; Anzelc, M S; [14]  Aoki, M; [15]  Arnoud, Y; [16]  Arov, M; [17]  Arthaud, M [18] 
  1. Joint Institute for Nuclear Research, Dubna (Russian Federation)
  2. University of Oklahoma, Norman, OK 73019 (United States)
  3. Michigan State University, East Lansing, MI 48824 (United States)
  4. Tata Institute of Fundamental Research, Mumbai (India)
  5. University of Illinois at Chicago, Chicago, IL 60607 (United States)
  6. Florida State University, Tallahassee, FL 32306 (United States)
  7. University of Alberta, Edmonton, Alberta, and Simon Fraser University, Burnaby, British Columbia, and York University, Toronto, Ontario, and McGill University, Montreal, Quebec (Canada)
  8. Kansas State University, Manhattan, KS 66506 (United States)
  9. Petersburg Nuclear Physics Institute, St. Petersburg (Russian Federation)
  10. University of Michigan, Ann Arbor, MI 48109 (United States)
  11. Northeastern University, Boston, MA 02115 (United States)
  12. LAFEX, Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro (Brazil)
  13. Radboud University Nijmegen/NIKHEF, Nijmegen (Netherlands)
  14. Northwestern University, Evanston, IL 60208 (United States)
  15. Fermi National Accelerator Laboratory, Batavia, IL 60510 (United States)
  16. LPSC, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut National Polytechnique de Grenoble, Grenoble (France)
  17. Louisiana Tech University, Ruston, LA 71272 (United States)
  18. CEA, Irfu, SPP, Saclay (France)
Publication Date:
Nov 02, 2009
DOI:
https://doi.org/10.1016/j.physletb.2009.10.016
Product Type:
Journal Article
Resource Relation:
Journal Name: Physics Letters. Section B; Journal Volume: 681; Journal Issue: 3; Other Information: DOI: 10.1016/j.physletb.2009.10.016; PII: S0370-2693(09)01174-5; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANCHING RATIO; COLLISIONS; ELECTRONS; FERMILAB TEVATRON; GEV RANGE; LUMINOSITY; PAIR PRODUCTION; PROTON-PROTON INTERACTIONS; QUARKS; STANDARD MODEL; TEV RANGE; TRANSVERSE ENERGY; ACCELERATORS; BARYON-BARYON INTERACTIONS; CYCLIC ACCELERATORS; DIMENSIONLESS NUMBERS; ELEMENTARY PARTICLES; ENERGY; ENERGY RANGE; FERMIONS; FIELD THEORIES; GRAND UNIFIED THEORY; HADRON-HADRON INTERACTIONS; INTERACTIONS; KINETIC ENERGY; LEPTONS; MATHEMATICAL MODELS; NUCLEON-NUCLEON INTERACTIONS; OPTICAL PROPERTIES; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; PHYSICAL PROPERTIES; PROTON-NUCLEON INTERACTIONS; QUANTUM FIELD THEORY; SYNCHROTRONS; UNIFIED GAUGE MODELS
OSTI ID:
21352090
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0370-2693; PYLBAJ; TRN: NL10R8848086224
Availability:
Available from http://dx.doi.org/10.1016/j.physletb.2009.10.016
Submitting Site:
NLN
Size:
page(s) 224-232
Announcement Date:
Nov 22, 2010

Journal Article:

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Citation Formats

Abazov, V M, Abbott, B, Abolins, M, Acharya, B S, Adams, M, Adams, T, Aguilo, E, Ahsan, M, Alexeev, G D, Alkhazov, G, Alton, A, Alverson, G, Alves, G A, Ancu, L S, Andeen, T, Anzelc, M S, Aoki, M, Arnoud, Y, Arov, M, and Arthaud, M. Search for pair production of first-generation leptoquarks in pp-bar collisions at sq root(s)=1.96 TeV. Netherlands: N. p., 2009. Web. doi:10.1016/j.physletb.2009.10.016.
Abazov, V M, Abbott, B, Abolins, M, Acharya, B S, Adams, M, Adams, T, Aguilo, E, Ahsan, M, Alexeev, G D, Alkhazov, G, Alton, A, Alverson, G, Alves, G A, Ancu, L S, Andeen, T, Anzelc, M S, Aoki, M, Arnoud, Y, Arov, M, & Arthaud, M. Search for pair production of first-generation leptoquarks in pp-bar collisions at sq root(s)=1.96 TeV. Netherlands. https://doi.org/10.1016/j.physletb.2009.10.016
Abazov, V M, Abbott, B, Abolins, M, Acharya, B S, Adams, M, Adams, T, Aguilo, E, Ahsan, M, Alexeev, G D, Alkhazov, G, Alton, A, Alverson, G, Alves, G A, Ancu, L S, Andeen, T, Anzelc, M S, Aoki, M, Arnoud, Y, Arov, M, and Arthaud, M. 2009. "Search for pair production of first-generation leptoquarks in pp-bar collisions at sq root(s)=1.96 TeV." Netherlands. https://doi.org/10.1016/j.physletb.2009.10.016.
@misc{etde_21352090,
title = {Search for pair production of first-generation leptoquarks in pp-bar collisions at sq root(s)=1.96 TeV}
 author = {Abazov, V M, Abbott, B, Abolins, M, Acharya, B S, Adams, M, Adams, T, Aguilo, E, Ahsan, M, Alexeev, G D, Alkhazov, G, Alton, A, Alverson, G, Alves, G A, Ancu, L S, Andeen, T, Anzelc, M S, Aoki, M, Arnoud, Y, Arov, M, and Arthaud, M}
 abstractNote = {A search for pair production of first-generation leptoquarks (LQ) is performed with data collected by the DO experiment in pp-bar collisions at sq root(s)=1.96 TeV at the Fermilab Tevatron Collider. In a sample of data corresponding to approx1 fb{sup -1} the search has been performed on the final states with two electrons and two jets or one electron, two jets and missing transverse energy. We find our data consistent with standard model expectations. The results are combined with those found in a previous analysis of events with two jets and missing transverse energy to obtain scalar LQ mass limits. We set 95% C.L. lower limits on a scalar LQ mass of 299 GeV, 284 GeV and 216 GeV for beta=1, beta=0.5 and beta=0.02 respectively, where beta is the LQ branching ratio in the eq channel. This improves the results obtained with a lower luminosity sample from Run II of the Tevatron. Lower limits on vector LQ masses with different couplings from 357 GeV to 464 GeV for beta=0.5 are also set using this analysis.}
 doi = {10.1016/j.physletb.2009.10.016}
 journal = []
 issue = {3}
 volume = {681}
 place = {Netherlands}
 year = {2009}
 month = {Nov}
 }