Search for pair production of first-generation leptoquarks in p anti-p collisions at s**(1/2) = 1.96-TeV

0339004 - FZÚ 2010 RIV NL eng J - Journal Article
Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš
Search for pair production of first-generation leptoquarks in p anti-p collisions at s**(1/2) = 1.96-TeV.
Physics Letters. B. Roč. 681, č. 3 (2009), s. 224-232. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT LC527; GA MŠMT LA08047
Institutional research plan: CEZ:AV0Z10100502
Keywords : D0 * collisions * leptokvarky
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 5.083, year: 2009
http://arxiv.org/abs/0907.1048

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.
Permanent Link: http://hdl.handle.net/11104/0182638