# Measurement of the tt̅ production cross section in 2  fb-1 of pp̅ collisions at √s=1.96  TeV using lepton plus jets events with soft muon b tagging

 dc.contributor University of Helsinki, Department of Physics en dc.contributor University of Helsinki, Helsinki Institute of Physics en dc.contributor University of Helsinki, Department of Physics en dc.contributor University of Helsinki, Helsinki Institute of Physics (HIP) (-2009) en dc.contributor University of Helsinki, Department of Physics en dc.contributor University of Helsinki, Department of Physics en dc.contributor.author Aaltonen, Timo dc.contributor.author Mehtälä, Petteri dc.contributor.author Orava, Risto dc.contributor.author Mäki, Tuula dc.contributor.author Saarikko, Heimo dc.contributor.author Österberg, Kenneth dc.contributor.author CDF collaboration dc.date.accessioned 2011-01-04T22:07:42Z dc.date.available 2011-01-04T22:07:42Z dc.date.issued 2009 dc.identifier.citation Aaltonen , T , Mehtälä , P , Orava , R , Mäki , T , Saarikko , H , Österberg , K & CDF collaboration 2009 , ' Measurement of the tt̅ production cross section in 2  fb-1 of pp̅ collisions at √s=1.96  TeV using lepton plus jets events with soft muon b tagging ' , Physical Review D : Particles, Fields, Gravitation and Cosmology , vol 79 , no. 5 , pp. 052007 . en dc.identifier.issn 1550-7998 dc.identifier.other PURE: 9384232 dc.identifier.other ArXiv: http://arxiv.org/abs/0901.4142v1 dc.identifier.uri http://hdl.handle.net/10138/24458 dc.description.abstract We present a measurement of the tt̅ production cross section in pp̅ collisions at √s=1.96  TeV using events containing a high transverse momentum electron or muon, three or more jets, and missing transverse energy. Events consistent with tt̅ decay are found by identifying jets containing candidate heavy-flavor semileptonic decays to muons. The measurement uses a CDF run II data sample corresponding to 2  fb-1 of integrated luminosity. Based on 248 candidate events with three or more jets and an expected background of 79.5±5.3 events, we measure a production cross section of 9.1±1.6  pb. en dc.description.abstract We present a measurement of the $\ttbar$ production cross section in $\ppbar$ collisions at $\sqrt{s}=1.96$ TeV using events containing a high transverse momentum electron or muon, three or more jets, and missing transverse energy. Events consistent with $\ttbar$ decay are found by identifying jets containing candidate heavy-flavor semileptonic decays to muons. The measurement uses a CDF Run II data sample corresponding to $2 \mathrm{fb^{-1}}$ of integrated luminosity. Based on 248 candidate events with three or more jets and an expected background of $79.5\pm5.3$ events, we measure a production cross section of $9.1\pm 1.6 \mathrm{pb}$. fi dc.format.extent 25 dc.language.iso eng dc.publisher American Physical Society dc.relation.ispartof Physical Review D : Particles, Fields, Gravitation and Cosmology dc.relation.uri http://prd.aps.org/pdf/PRD/v79/i5/e052007 dc.subject 114 Physical sciences en dc.subject hep-ex en dc.title Measurement of the tt̅ production cross section in 2  fb-1 of pp̅ collisions at √s=1.96  TeV using lepton plus jets events with soft muon b tagging en dc.title.alternative Measurement of the $\ttbar$ Production Cross Section in 2 fb$^{-1}$ of $\ppbar$ Collisions at $\sqrt{s}=1.96$ TeV Using Lepton Plus Jets Events with Soft Muon b-Tagging en dc.type A1 Refereed journal article dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.79.052007 dc.type.dcmitype document dc.type.uri info:eu-repo/semantics/article dc.contributor.uhperson Aaltonen, Timo dc.contributor.uhperson Mehtälä, Petteri dc.contributor.uhperson Orava, Risto dc.contributor.uhperson Mäki, Tuula dc.contributor.uhperson Saarikko, Heimo dc.contributor.uhperson Österberg, Kenneth