The charge asymmetry in the production of top quark and antiquark pairs is measured in proton-proton collisions at a center-of-mass energy of 8 TeV. The data, corresponding to an integrated luminosity of 19.6 fb(-1), were collected by the CMS experiment at the LHC. Events with a single isolated electron or muon, and four or more jets, at least one of which is likely to have originated from hadronization of a bottom quark, are selected. A template technique is used to measure the asymmetry in the distribution of differences in the top quark and antiquark absolute rapidities. The measured asymmetry is A(c)(y) = [0.33 +/- 0.26(stat) +/- 0.33(syst)] , which is the most precise result to date. The results are compared to calculations based on the standard model and on several beyond-the-standard-model scenarios.

Measurement of the charge asymmetry in top quark pair production in pp collisions at root s=8 TeV using a template method / Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V.M., Hartl, C., Hörmann, N., Hrubec, J., Jeitler, M., Knünz, V., König, A., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - STAMPA. - 93:3(2016). [10.1103/PhysRevD.93.034014]

Measurement of the charge asymmetry in top quark pair production in pp collisions at root s=8 TeV using a template method

CREANZA, Donato Maria;DE FILIPPIS, Nicola;IASELLI, Giuseppe;MAGGI, Giorgio Pietro;PUGLIESE, Gabriella Maria Incoronata;
2016

Abstract

The charge asymmetry in the production of top quark and antiquark pairs is measured in proton-proton collisions at a center-of-mass energy of 8 TeV. The data, corresponding to an integrated luminosity of 19.6 fb(-1), were collected by the CMS experiment at the LHC. Events with a single isolated electron or muon, and four or more jets, at least one of which is likely to have originated from hadronization of a bottom quark, are selected. A template technique is used to measure the asymmetry in the distribution of differences in the top quark and antiquark absolute rapidities. The measured asymmetry is A(c)(y) = [0.33 +/- 0.26(stat) +/- 0.33(syst)] , which is the most precise result to date. The results are compared to calculations based on the standard model and on several beyond-the-standard-model scenarios.
2016
Measurement of the charge asymmetry in top quark pair production in pp collisions at root s=8 TeV using a template method / Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Brandstetter, J., Brondolin, E., Dragicevic, M., Erö, J., Flechl, M., Friedl, M., Frühwirth, R., Ghete, V.M., Hartl, C., Hörmann, N., Hrubec, J., Jeitler, M., Knünz, V., König, A., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - STAMPA. - 93:3(2016). [10.1103/PhysRevD.93.034014]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/77022
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