Search for a narrow ttˉ resonance in ppˉ collisions at s√=1.96 TeV

0379935 - FZÚ 2013 RIV US eng J - Journal Article
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … Total 409 authors
Search for a narrow ttˉ resonance in ppˉ collisions at s√=1.96 TeV.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 85, č. 5 (2012), "051101-1"-"051101-7". ISSN 1550-7998
R&D Projects: GA MŠMT LA08047
Institutional research plan: CEZ:AV0Z10100502
Keywords : D0 * pair production * anti-p p scattering * Batavia TEVATRON Coll * topcolor * narrow resonance
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 4.691, year: 2012
http://prd.aps.org/abstract/PRD/v85/i5/e051101

We report a search for a narrow ttˉ resonance that decays into a lepton+jets final state based on an integrated luminosity of 5.3 fb-1 of proton-antiproton collisions at √s=1.96 TeV collected by the D0 Collaboration at the Fermilab Tevatron Collider. We set upper limits on the production cross section of such a resonance multiplied by its branching fraction to ttˉ . We exclude a leptophobic topcolor Z′ at the 95% confidence level for masses below 835 GeV (940 GeV) if its width is 1.2% (3%) of its mass. We also exclude color octet vector bosons (colorons) with masses below 775 GeV.
Permanent Link: http://hdl.handle.net/11104/0210781