dc.contributor | Yerevan Physics Institute | |
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dc.date.accessioned | 2014-05-27T11:29:00Z | |
dc.date.accessioned | 2022-10-05T18:48:32Z | |
dc.date.available | 2014-05-27T11:29:00Z | |
dc.date.available | 2022-10-05T18:48:32Z | |
dc.date.created | 2014-05-27T11:29:00Z | |
dc.date.issued | 2013-04-25 | |
dc.identifier | Physical Review Letters, v. 110, n. 17, 2013. | |
dc.identifier | 0031-9007 | |
dc.identifier | 1079-7114 | |
dc.identifier | http://hdl.handle.net/11449/75168 | |
dc.identifier | 10.1103/PhysRevLett.110.172002 | |
dc.identifier | WOS:000318188100004 | |
dc.identifier | 2-s2.0-84876986000 | |
dc.identifier | 2-s2.0-84876986000.pdf | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3924106 | |
dc.description.abstract | The first measurement of vector-boson production associated with a top quark-antiquark pair in proton-proton collisions at √s=7 TeV is presented. The results are based on a data set corresponding to an integrated luminosity of 5.0 fb-1, recorded by the CMS detector at the LHC in 2011. The measurement is performed in two independent channels through a trilepton analysis of tt̄Z events and a same-sign dilepton analysis of tt̄V (V=W or Z) events. In the trilepton channel a direct measurement of the tt̄Z cross section σtt̄Z=0.28-0.11+0.14 (stat)-0.03+0.06 (syst) pb is obtained. In the dilepton channel a measurement of the tt̄V cross section yields σtt̄V=0.43-0.15+0.17 (stat)-0.07+0.09 (syst) pb. These measurements have a significance, respectively, of 3.3 and 3.0 standard deviations from the background hypotheses and are compatible, within uncertainties, with the corresponding next-to-leading order predictions of 0.137-0.016+0.012 and 0.306-0.053+0.031 pb. © 2013 CERN. Published by the American Physical Society. | |
dc.language | eng | |
dc.relation | Physical Review Letters | |
dc.relation | 8.839 | |
dc.relation | 3,622 | |
dc.relation | 3,622 | |
dc.rights | Acesso restrito | |
dc.source | Scopus | |
dc.subject | CMS detectors | |
dc.subject | Direct measurement | |
dc.subject | Independent channels | |
dc.subject | Integrated luminosity | |
dc.subject | Next-to-leading orders | |
dc.subject | Production of | |
dc.subject | Proton proton collisions | |
dc.subject | Standard deviation | |
dc.subject | Bosons | |
dc.subject | High energy physics | |
dc.subject | Tellurium compounds | |
dc.subject | Uncertainty analysis | |
dc.title | Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at √s=7 TeV | |
dc.type | Artigo | |