Measurement of the triple-differential dijet cross section in proton-proton collisions at √s = 8 TeV and constraints on parton distribution functions

Abercrombie, Daniel Robert; Allen, Brandon Leigh; Apyan, Aram; Azzolini, Virginia; Barbieri, Richard Alexander; Baty, Austin Alan; Bi, Ran; Bierwagen, Katharina; Brandt, Stephanie Akemi; Busza, Wit; Cali, Ivan Amos; D'Alfonso, Mariarosaria; Demiragli, Zeynep; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hsu, Dylan George; Iiyama, Yutaro; Innocenti, Gian Michele; Klute, Markus; Kovalskyi, Dmytro; Krajczar, Krisztian F.; Lai, Yue Shi; Lee, Yen-Jie; Levin, Andrew Michael; Luckey Jr, P David; Maier, Benedikt; Marini, Andrea Carlo; McGinn, Christopher Francis; Mironov, Camelia Maria; Narayanan, Siddharth Madhavan; Niu, Xinmei; Paus, Christoph M. E.; Roland, Christof E; Roland, Gunther M; Salfeld-Nebgen, Jakob Maxillian Henry; Stephans, George S. F.; Tatar, Kaya; Velicanu, Dragos Alexandru; Wyslouch, Boleslaw

Author(s)

Abercrombie, Daniel Robert; Allen, Brandon Leigh; Apyan, Aram; Azzolini, Virginia; Barbieri, Richard Alexander; ... Show more

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Abstract

A measurement is presented of the triple-differential dijet cross section at a centre-of-mass energy of 8 TeV using 19.7fb[superscript -1] of data collected with the CMS detector in proton-proton collisions at the LHC. The cross section is measured as a function of the average transverse momentum, half the rapidity separation, and the boost of the two leading jets in the event. The cross section is corrected for detector effects and compared to calculations in perturbative quantum chromodynamics at next-to-leading order accuracy, complemented with electroweak and nonperturbative corrections. New constraints on parton distribution functions are obtained and the inferred value of the strong coupling constant is α[subscript S](MZ)=0.1199±0.0015(exp)[subscript -0.0020][superscript +0.0031](theo), where M[subscript Z] is the mass of the Z boson. Keywords: CMS, Physics, QCD, PDF, Jets, Strong coupling constant, alpha-s

Date issued

2017-11

URI

http://hdl.handle.net/1721.1/120519

Department

Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science

Journal

The European Physical Journal C

Publisher

Springer Nature

Citation

Sirunyan, A. M., A. Tumasyan, W. Adam, E. Asilar, T. Bergauer, J. Brandstetter, et al. “Measurement of the Triple-Differential Dijet Cross Section in Proton-Proton Collisions at √s =8 TeV and Constraints on Parton Distribution Functions.” The European Physical Journal C 77, no. 11 (November 2017). © 2017, CERN for the benefit of the CMS collaboration

Version: Final published version

ISSN

1434-6044

1434-6052

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