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).

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

Sola, V.;AMAPANE, Nicola Carlo;ARGIRO', Stefano;BELLAN, Riccardo;CASASSO, STEFANO;COSTA, Marco;DEGANO, Alessandro;FINCO, LINDA;MIGLIORE, Ernesto;MONACO, Vincenzo;MUSICH, MARCO;OBERTINO, Maria Margherita;PACHER, LUCA;PELLICCIONI, Mario;PINNA ANGIONI, GIAN LUCA;ROMERO, Alessandra;SACCHI, Roberto;SOLANO, Ada Maria;TAMPONI, UMBERTO;COVARELLI, Roberto;
2015-01-01

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).
2015
75
1
24
http://link.springer-ny.com/link/service/journals/10052/index.htm
3-jet mass; Alpha-S; CMS; Jets; PDF; Physics; QCD; Strong coupling constant; Physics and Astronomy (miscellaneous); Engineering (miscellaneous)
Khachatryan, V; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V.M.; Har...espandi
File in questo prodotto:
File Dimensione Formato  
3A10.1140_epjc_10052-015-3376-y.pdf

Accesso aperto

Tipo di file: PDF EDITORIALE
Dimensione 1.79 MB
Formato Adobe PDF
1.79 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1575874
Citazioni
  • ???jsp.display-item.citation.pmc??? 3
  • Scopus 42
  • ???jsp.display-item.citation.isi??? 52
social impact