Search for pair production of first-generation leptoquarks in p pbar collisions at sqrt(s)=1.96 TeV

D0 Collaboration, The and Bertram, Iain and Borissov, Guennadi and Fox, Harald and Williams, Mark and Ratoff, Peter and Love, Peter and Rakitin, Alexander and Sopczak, Andre (2009) Search for pair production of first-generation leptoquarks in p pbar collisions at sqrt(s)=1.96 TeV. Physics Letters B, 681 (3). pp. 224-232. ISSN 0370-2693

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Abstract

A search for pair production of first-generation leptoquarks LQ is performed with data collected by the D0 experiment in p pbar collisions at sqrt(s)=1.96 TeV at the Fermilab Tevatron Collider. In a sample of data corresponding to ~1 fb-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.

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Additional Information:
10 pages 10 figures Submitted to Physics Letters B
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
?? nuclear and high energy physics ??
ID Code:
64144
Deposited By:
Deposited On:
25 Apr 2013 10:32
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2024 13:47