Measurement of the inclusive 3-jet production differential cross section in proton-proton collisions at 7 TeV and determination of the strong coupling constant in the TeV range

Title
Measurement of the inclusive 3-jet production differential cross section in proton-proton collisions at 7 TeV and determination of the strong coupling constant in the TeV range
Authors
김태정
Keywords
PARTON DISTRIBUTIONS; JET FRAGMENTATION; ROOT-S=7 TEV; MODEL; SCATTERING; ALPHA(S); LHC
Issue Date
2015-05
Publisher
SPRINGER
Citation
EUROPEAN PHYSICAL JOURNAL C, v. 75, NO 5, Page. 5-24
Abstract
This paper presents a measurement of the inclusive 3-jet production differential cross section at a proton-proton centre-of-mass energy of 7 TeV using data corresponding to an integrated luminosity of 5 fb(-1) collected with the CMS detector. The analysis is based on the three jets with the highest transverse momenta. The cross section is measured as a function of the invariant mass of the three jets in a range of 445-3270 GeV and in two bins of the maximum rapidity of the jets up to a value of 2. A comparison between the measurement and the prediction from perturbative QCD at next-to-leading order is performed. Within uncertainties, data and theory are in agreement. The sensitivity of the observable to the strong coupling constant alpha(S) is studied. A fit to all data points with 3-jet masses larger than 664 GeV gives a value of the strong coupling constant of alpha(S)(M-Z) = 0.1171 +/- 0.0013 (exp) (+0.0073)(-0.0047) (theo).
URI
http://link.springer.com/article/10.1140%2Fepjc%2Fs10052-015-3376-yhttp://hdl.handle.net/20.500.11754/24763
ISSN
1434-6044; 1434-6052
DOI
http://dx.doi.org/10.1140/epjc/s10052-015-3376-y
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COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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