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Title: Search for second-generation scalar leptoquarks in p anti-p collisions at s**(1/2) = 1.96-TeV

Abstract

Results on a search for pair production of second generation scalar leptoquark in p{bar p} collisions at {radical}s=1.96 TeV are reported. The data analyzed were collected by the CDF detector during the 2002-2003 Tevatron Run II and correspond to an integrated luminosity of 198 pb{sup -1}. Leptoquarks (LQ) are sought through their decay into (charged) leptons and quarks, with final state signatures represented by two muons and jets and one muon, large transverse missing energy and jets. We observe no evidence for LQ production and derive 95% C.L. upper limits on the LQ production cross sections as well as lower limits on their mass as a function of {beta}, where {beta} is the branching fraction for LQ {yields} {mu}q.

Authors:
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Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
892532
Report Number(s):
FERMILAB-PUB-05-546-E
arXiv eprint number hep-ex/0512055; TRN: US0605782
DOE Contract Number:
AC02-76CH03000
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys.Rev.D73:051102,2006
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CROSS SECTIONS; DECAY; FERMILAB COLLIDER DETECTOR; FERMILAB TEVATRON; LEPTONS; LUMINOSITY; MUONS; PAIR PRODUCTION; PRODUCTION; QUARKS; SCALARS; Experiment-HEP

Citation Formats

Abulencia, A., Acosta, D., Adelman, J., Affolder, Anthony A., Akimoto, T., Albrow, M.G., Ambrose, D., Amerio, S., Amidei, D., Anastassov, A., Anikeev, K., Annovi, A., Antos, J., Aoki, M., Apollinari, G., Arguin, J.-F., Arisawa, T., Artikov, A., Ashmanskas, W., Attal, A., Azfar, F., and /Taiwan, Inst. Phys. /Argonne /Barcelona, IFAE /Baylor U. /INFN, Bologna /Bologna U. /Brandeis U. /UC, Davis /UCLA /UC, San Diego /UC, Santa Barbara /Cantabria Inst. of Phys. /Carnegie Mellon U. /Chicago U., EFI /Dubna, JINR /Duke U. /Fermilab /Florida U. /Frascati /Geneva U. /Glasgow U. Search for second-generation scalar leptoquarks in p anti-p collisions at s**(1/2) = 1.96-TeV. United States: N. p., 2005. Web. doi:10.1103/PhysRevD.73.051102.
Abulencia, A., Acosta, D., Adelman, J., Affolder, Anthony A., Akimoto, T., Albrow, M.G., Ambrose, D., Amerio, S., Amidei, D., Anastassov, A., Anikeev, K., Annovi, A., Antos, J., Aoki, M., Apollinari, G., Arguin, J.-F., Arisawa, T., Artikov, A., Ashmanskas, W., Attal, A., Azfar, F., & /Taiwan, Inst. Phys. /Argonne /Barcelona, IFAE /Baylor U. /INFN, Bologna /Bologna U. /Brandeis U. /UC, Davis /UCLA /UC, San Diego /UC, Santa Barbara /Cantabria Inst. of Phys. /Carnegie Mellon U. /Chicago U., EFI /Dubna, JINR /Duke U. /Fermilab /Florida U. /Frascati /Geneva U. /Glasgow U. Search for second-generation scalar leptoquarks in p anti-p collisions at s**(1/2) = 1.96-TeV. United States. doi:10.1103/PhysRevD.73.051102.
Abulencia, A., Acosta, D., Adelman, J., Affolder, Anthony A., Akimoto, T., Albrow, M.G., Ambrose, D., Amerio, S., Amidei, D., Anastassov, A., Anikeev, K., Annovi, A., Antos, J., Aoki, M., Apollinari, G., Arguin, J.-F., Arisawa, T., Artikov, A., Ashmanskas, W., Attal, A., Azfar, F., and /Taiwan, Inst. Phys. /Argonne /Barcelona, IFAE /Baylor U. /INFN, Bologna /Bologna U. /Brandeis U. /UC, Davis /UCLA /UC, San Diego /UC, Santa Barbara /Cantabria Inst. of Phys. /Carnegie Mellon U. /Chicago U., EFI /Dubna, JINR /Duke U. /Fermilab /Florida U. /Frascati /Geneva U. /Glasgow U. Thu . "Search for second-generation scalar leptoquarks in p anti-p collisions at s**(1/2) = 1.96-TeV". United States. doi:10.1103/PhysRevD.73.051102. https://www.osti.gov/servlets/purl/892532.
@article{osti_892532,
title = {Search for second-generation scalar leptoquarks in p anti-p collisions at s**(1/2) = 1.96-TeV},
author = {Abulencia, A. and Acosta, D. and Adelman, J. and Affolder, Anthony A. and Akimoto, T. and Albrow, M.G. and Ambrose, D. and Amerio, S. and Amidei, D. and Anastassov, A. and Anikeev, K. and Annovi, A. and Antos, J. and Aoki, M. and Apollinari, G. and Arguin, J.-F. and Arisawa, T. and Artikov, A. and Ashmanskas, W. and Attal, A. and Azfar, F. and /Taiwan, Inst. Phys. /Argonne /Barcelona, IFAE /Baylor U. /INFN, Bologna /Bologna U. /Brandeis U. /UC, Davis /UCLA /UC, San Diego /UC, Santa Barbara /Cantabria Inst. of Phys. /Carnegie Mellon U. /Chicago U., EFI /Dubna, JINR /Duke U. /Fermilab /Florida U. /Frascati /Geneva U. /Glasgow U.},
abstractNote = {Results on a search for pair production of second generation scalar leptoquark in p{bar p} collisions at {radical}s=1.96 TeV are reported. The data analyzed were collected by the CDF detector during the 2002-2003 Tevatron Run II and correspond to an integrated luminosity of 198 pb{sup -1}. Leptoquarks (LQ) are sought through their decay into (charged) leptons and quarks, with final state signatures represented by two muons and jets and one muon, large transverse missing energy and jets. We observe no evidence for LQ production and derive 95% C.L. upper limits on the LQ production cross sections as well as lower limits on their mass as a function of {beta}, where {beta} is the branching fraction for LQ {yields} {mu}q.},
doi = {10.1103/PhysRevD.73.051102},
journal = {Phys.Rev.D73:051102,2006},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2005},
month = {Thu Dec 01 00:00:00 EST 2005}
}
  • The authors report on a search for the pair production of second generation scalar leptoquarks (LQ{sub 2}) in p{bar p} collisions at the center-of-mass energy {radical}s = 1.96 TeV, using data corresponding to an integrated luminosity of 294 {+-} 19 pb{sup -1} recorded with the D0 detector. No evidence for a leptoquark signal in the LQ{sub 2} {ovr LQ}{sub 2} {yields} {mu}q{mu}q channel has been observed, and upper bounds on the product of cross section times branching fraction were set. This yields lower mass limits of m{sub LQ{sub 2}} > 247 GeV for {beta} = {Beta}(LQ{sub 2} {yields} {mu}q) =more » 1 and m{sub LQ{sub 2}} > 182 GeV for {beta} = 1/2. Combining these limits with previous D0 results, the lower limits on the mass of a second generation scalar leptoquark are m{sub LQ{sub 2}} > 251 GeV and m{sub LQ{sub 2}} > 204 GeV for {beta} = 1 and {beta} = 1/2, respectively.« less
  • The authors report on a search for pair production of first-generation scalar leptoquarks (LQ) in p{bar p} collisions at {radical}s = 1.96 TeV using an integrated luminosity of 252 pb{sup -1} collected at the Fermilab Tevatron collider by the D0 detector. They observe no evidence for LQ production in the topologies arising from LQ{ovr LQ} {yields} eqeq and LQ{ovr LQ} {yields} eqvq, and derive 95% C.L. lower limits on the LQ mass as a function of {beta}, where {beta} is the branching fraction for LQ {yields} eq. The limits are 241 and 218 GeV/c{sup 2} for {beta} = 1 andmore » 0.5, respectively. These results are combined with those obtained by D0 at {radical}s = 1.8 TeV, which increases these LQ mass limits to 256 and 234 GeV/c{sup 2}.« less
  • We report on a search for pair production of first-generation scalar leptoquarks (LQ) in pp collisions at {radical}(s)=1.96 TeV using an integrated luminosity of 203 pb{sup -1} collected at the Fermilab Tevatron collider by the CDF experiment. We observe no evidence for LQ production in the topologies arising from LQLQ{yields}eqeq and LQLQ{yields}eq{nu}q, and derive 95% C.L. upper limits on the LQ production cross section. The results are combined with those obtained from a separately reported CDF search in the topology arising from LQLQ{yields}{nu}q{nu}q and 95% C.L. lower limits on the LQ mass as a function of {beta}=BR(LQ{yields}eq) are derived. Themore » limits are 236, 205 and 145 GeV/c{sup 2} for {beta}=1, {beta}=0.5 and {beta}=0.1, respectively.« less
  • A search for leptoquarks has been performed in 310 pb{sup -1} of data from p{bar p} collisions at a center-of-mass energy of 1.96 TeV, collected by the D0 detector at the Fermilab Tevatron Collider. The topology analyzed consists of acoplanar jets with missing transverse energy. The data show good agreement with standard model expectations, and a lower mass limit of 136 GeV has been set at the 95% C.L. for a scalar leptoquark decaying exclusively into a quark and a neutrino.