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Measurement of the Z boson differential cross section in transverse momentum and rapidity in proton–proton collisions at 8 TeV

Author(s)
CMS Collaboration; Apyan, Aram; Barbieri, Richard Alexander; Baty, Austin Alan; Bierwagen, Katharina; Brandt, Stephanie Akemi; Busza, Wit; Cali, Ivan Amos; Di Matteo, Leonardo; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Gulhan, Doga Can; Klute, Markus; Lai, Yue Shi; Lee, Yen-Jie; Levin, Andrew Michael; Luckey Jr, P David; Niu, Xinmei; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E; Roland, Gunther M; Stephans, George S. F.; Sumorok, Konstanty C; Velicanu, Dragos Alexandru; Veverka, Jan; Wang, Ta-Wei; Wyslouch, Boleslaw; Yang, Ming; Zanetti, Marco; Wyslouch, Victoria; ... Show more Show less
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Abstract
We present a measurement of the Z boson differential cross section in rapidity and transverse momentum using a data sample of pp collision events at a centre-of-mass energy √s = 8 TeV, corresponding to an integrated luminosity of 19.7 fb ⁻¹. The Z boson is identified via its decay to a pair of muons. The measurement provides a precision test of quantum chromodynamics over a large region of phase space. In addition, due to the small experimental uncertainties in the measurement the data has the potential to constrain the gluon parton distribution function in the kinematic regime important for Higgs boson production via gluon fusion. The results agree with the next-to-next-to-leading-order predictions computed with the FEWZ program. The results are also compared to the commonly used leading-order MADGRAPH and next-to-leading-order POWHEG generators.
Date issued
2015-07
URI
http://hdl.handle.net/1721.1/116260
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physics Letters B
Publisher
Elsevier BV
Citation
Khachatryan, V. et al. “Measurement of the Z Boson Differential Cross Section in Transverse Momentum and Rapidity in Proton–proton Collisions at 8 TeV.” Physics Letters B 749 (October 2015): 187–209 © 2015 CERN for the benefit of the CMS Collaboration
Version: Final published version
ISSN
0370-2693

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