Abstract : Cross sections for the production of a Z boson in association with jets in proton-proton collisions at a centre-of-mass energy of sqrt(s)=8 TeV are measured using a data sample collected by the CMS experiment at the LHC corresponding to 19.6 inverse femtobarns. Differential cross sections are presented as functions of up to three observables that describe the jet kinematics and the jet activity. Correlations between the azimuthal directions and the rapidities of the jets and the Z boson are studied in detail. The predictions of a number of multileg generators with leading or next-to-leading order accuracy are compared with the measurements. The comparison shows the importance of including multi-parton contributions in the matrix elements and the improvement in the predictions when next-to-leading order terms are included.
http://hal.in2p3.fr/in2p3-01396129
Contributeur : Sylvie Flores
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Soumis le : mardi 18 décembre 2018 - 09:09:43
Dernière modification le : jeudi 7 février 2019 - 15:28:24
Document(s) archivé(s) le : mardi 19 mars 2019 - 17:17:51
V. Khachatryan, M. Besançon, F. Couderc, M. Dejardin, D. Denegri, et al.. Measurements of the differential production cross sections for a Z boson in association with jets in pp collisions at sqrt(s) = 8 TeV. Journal of High Energy Physics, Springer Verlag (Germany), 2017, 04 (4), pp.022. 〈10.1007/JHEP04(2017)022〉. 〈in2p3-01396129〉
