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Measurement of dijet azimuthal decorrelation in pp collisions at √s=8TeV

CMS Collaboration; 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.; ... mehr

Abstract (englisch):

A measurement of the decorrelation of azimuthal angles between the two jets with the largest transverse momenta is presented for seven regions of leading jet transverse momentum up to 2.2TeV.The analysis is based on the proton-proton collision data collected with the CMS experiment at a centre-of-mass energy of 8TeV corresponding to an integrated luminosity of 19.7fb⁻¹. The dijet azimuthal decorrelation is caused by the radiation of additional jets and probes the dynamics of multijet production. The results are compared to fixed-order predictions of perturbative quantum chromodynamics (QCD), and to simulations using Monte Carlo event generators that include parton showers, hadronization, and multiparton interactions. Event generators with only two outgoing high transverse momentum partons fail to describe the measurement, even when supplemented with next-to-leading-order QCD corrections and parton showers. Much better agreement is achieved when at least three outgoing partons are complemented through either next-to-leading-order predictions or parton showers. This observation emphasizes the need to improve predictions for multijet production.


Volltext §
DOI: 10.5445/IR/1000060826
Originalveröffentlichung
DOI: 10.1140/epjc/s10052-016-4346-8
Scopus
Zitationen: 18
Web of Science
Zitationen: 16
Dimensions
Zitationen: 10
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Physik – Institut für Experimentelle Kernphysik (IEKP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 1434-6044, 1434-6052
urn:nbn:de:swb:90-608267
KITopen-ID: 1000060826
Erschienen in The European physical journal / C
Verlag Springer-Verlag
Band 76
Heft 10
Seiten 536
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Nachgewiesen in Dimensions
Web of Science
Scopus
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