A measurement is presented of the production cross section in proton-proton collisions at a centre-of-mass energy of 7 TeV, in the all-jet final state that contains at least six jets, two of which are tagged as originating from b quarks. The data correspond to an integrated luminosity of 3.54 fb(−1), collected with the CMS detector at the LHC. The cross section is determined through an unbinned maximum likelihood fit of background and signal to the reconstructed mass spectrum of candidates in the data, in which events are subjected to a kinematic fit assuming a jets hypothesis. The measurement yields , a result consistent with those obtained in other decay channels, as well as with predictions of the standard model. A measurement is presented of the t t-bar cross section (sigma[ttbar]) in proton-proton collisions at a centre-of-mass energy of 7 TeV, in the all-jet final state that contains at least six jets, two of which are tagged as originating from b quarks. The data correspond to an integrated luminosity of 3.54 inverse femtobarns, collected with the CMS detector at the LHC. The cross section is determined through an unbinned maximum likelihood fit of background and t t-bar signal to the reconstructed mass spectrum of t t-bar candidates in the data, in which events are subjected to a kinematic fit assuming a t t-bar to W+ b W- b-bar to 6 jets hypothesis. The measurement yields sigma[ttbar] = 139 +/- 10 (stat.) +/- 26 (syst.) +/- 3 (lum.) pb, a result consistent with those obtained in other t t-bar decay channels, as well as with predictions of the standard model

Chatrchyan, S., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Aguilo, E., et al. (2013). Measurement of the t(t)over-bar production cross section in the all-jet final state in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2013(5) [10.1007/JHEP05(2013)065].

Measurement of the t(t)over-bar production cross section in the all-jet final state in pp collisions at root s=7 TeV

BENAGLIA, ANDREA DAVIDE;DE GUIO, FEDERICO;DI MATTEO, LEONARDO;FIORENDI, SARA;GHEZZI, ALESSIO;MANZONI, RICCARDO ANDREA;MARTELLI, ARABELLA;MASSIRONI, ANDREA;MORONI, LUIGI;PAGANONI, MARCO;RAGAZZI, STEFANO;TABARELLI DE FATIS, TOMMASO;Branca, A;Govoni, P;DINARDO, MAURO EMANUELE;
2013

Abstract

A measurement is presented of the production cross section in proton-proton collisions at a centre-of-mass energy of 7 TeV, in the all-jet final state that contains at least six jets, two of which are tagged as originating from b quarks. The data correspond to an integrated luminosity of 3.54 fb(−1), collected with the CMS detector at the LHC. The cross section is determined through an unbinned maximum likelihood fit of background and signal to the reconstructed mass spectrum of candidates in the data, in which events are subjected to a kinematic fit assuming a jets hypothesis. The measurement yields , a result consistent with those obtained in other decay channels, as well as with predictions of the standard model. A measurement is presented of the t t-bar cross section (sigma[ttbar]) in proton-proton collisions at a centre-of-mass energy of 7 TeV, in the all-jet final state that contains at least six jets, two of which are tagged as originating from b quarks. The data correspond to an integrated luminosity of 3.54 inverse femtobarns, collected with the CMS detector at the LHC. The cross section is determined through an unbinned maximum likelihood fit of background and t t-bar signal to the reconstructed mass spectrum of t t-bar candidates in the data, in which events are subjected to a kinematic fit assuming a t t-bar to W+ b W- b-bar to 6 jets hypothesis. The measurement yields sigma[ttbar] = 139 +/- 10 (stat.) +/- 26 (syst.) +/- 3 (lum.) pb, a result consistent with those obtained in other t t-bar decay channels, as well as with predictions of the standard model
Articolo in rivista - Articolo scientifico
high energy collider; LHC; CMS; top quark
English
2013
2013
5
065
none
Chatrchyan, S., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Aguilo, E., et al. (2013). Measurement of the t(t)over-bar production cross section in the all-jet final state in pp collisions at root s=7 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2013(5) [10.1007/JHEP05(2013)065].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/46167
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