Measurement of the ratio of the inclusive 3-jet cross section to the inclusive 2-jet cross section in pp collisions at sqrt(s) = 7 TeV and first determination of the strong coupling constant in the TeV range
Articolo
Data di Pubblicazione:
2013
Abstract:
A measurement is presented of the ratio of the inclusive 3-jet cross section to the inclusive 2-jet cross section as a function of the average transverse momentum, ⟨pT1,2⟩, of the two leading jets in the event. The data sample was collected during 2011 at a proton–proton centre-of-mass energy of 7 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 5.0 fb−1. The strong coupling constant at the scale of the Z boson mass is determined to be alpha_S(M_Z)=0.1148±0.0014 (exp.)±0.0018 (PDF)±0.0050(theory), by comparing the ratio in the range 0.42<⟨pT1,2⟩<1.39 TeV to the predictions of perturbative QCD at next-to-leading order. This is the first determination of alpha_S(M_Z) from measurements at momentum scales beyond 0.6 TeV. The predicted ratio depends only indirectly on the evolution of the parton distribution functions of the proton such that this measurement also serves as a test of the evolution of the strong coupling constant. No deviation from the expected behaviour is observed.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
S. Chatrchyan;V. Khachatryan;A. M. Sirunyan;A. Tumasyan;W. Adam;T. Bergauer;M. Dragicevic;J. Erö;C. Fabjan;M. Friedl;R. Frühwirth;V. M. Ghete;N. Hörmann;J. Hrubec;M. Jeitler;W. Kiesenhofer;V. Knünz;M. Krammer;I. Krätschmer;D. Liko;I. Mikulec;D. Rabady;B. Rahbaran;C. Rohringer;H. Rohringer;R. Schöfbeck;J. Strauss;A. Taurok;W. Treberer-Treberspurg;W. Waltenberger;C.-E. Wulz;V. Mossolov;N. Shumeiko;J. Suarez Gonzalez;S. Alderweireldt;M. Bansal;S. Bansal;T. Cornelis;E. A. Wolf;X. Janssen;A. Knutsson;S. Luyckx;L. Mucibello;S. Ochesanu;B. Roland;R. Rougny;H. Haevermaet;P. Mechelen;N. Remortel;A. Spilbeeck;F. Blekman;S. Blyweert;J. D’Hondt;A. Kalogeropoulos;J. Keaveney;M. Maes;A. Olbrechts;S. Tavernier;W. Doninck;P. Mulders;G. P. Onsem;I. Villella;B. Clerbaux;G. Lentdecker;L. Favart;A. P. R. Gay;T. Hreus;A. Léonard;P. E. Marage;A. Mohammadi;T. Reis;L. Thomas;C. Vander Velde;P. Vanlaer;J. Wang;V. Adler;K. Beernaert;L. Benucci;A. Cimmino;S. Costantini;S. Dildick;G. Garcia;B. Klein;J. Lellouch;A. Marinov;J. Mccartin;A. A. Ocampo Rios;D. Ryckbosch;M. Sigamani;N. Strobbe;F. Thyssen;M. Tytgat;S. Walsh;E. Yazgan;N. Zaganidis;S. Basegmez;C. Beluffi;G. Bruno;R. Castello;A. Caudron;L. Ceard;C. Delaere;T. du Pree;D. Favart;L. Forthomme;A. Giammanco;J. Hollar;V. Lemaitre;J. Liao;O. Militaru;C. Nuttens;D. Pagano;A. Pin;K. Piotrzkowski;A. Popov;M. Selvaggi;J. M. Vizan Garcia;N. Beliy;T. Caebergs;E. Daubie;G. H. Hammad;G. A. Alves;M. Correa Martins Junior;T. Martins;M. E. Pol;M. H. G. Souza;W. L. Aldá Júnior;W. Carvalho;J. Chinellato;A. Custódio;E. M. Costa;D. Jesus Damiao;C. Oliveira Martins;S. Fonseca De Souza;H. Malbouisson;M. Malek;D. Matos Figueiredo;L. Mundim;H. Nogima;W. L. Prado Da Silva;A. Santoro;L. Soares Jorge;A. Sznajder;E. J. Tonelli Manganote;A. Vilela Pereira;T. S. Anjos;C. A. Bernardes;F. A. Dias;T. R. Fernandez Perez Tomei;E. M. Gregores;C. Lagana;F. Marinho;P. G. Mercadante;S. F. Novaes;Sandra S. Padula;V. Genchev;P. Iaydjiev;S. Piperov;M. Rodozov;S. Stoykova;G. Sultanov;V. Tcholakov;R. Trayanov;M. Vutova;A. Dimitrov;R. Hadjiiska;V. Kozhuharov;L. Litov;B. Pavlov;P. Petkov;J. G. Bian;G. M. Chen;H. S. Chen;C. H. Jiang;D. Liang;S. Liang;X. Meng;J. Tao;J. Wang;X. Wang;Z. Wang;H. Xiao;M. Xu;C. Asawatangtrakuldee;Y. Ban;Y. Guo;Q. Li;W. Li;S. Liu;Y. Mao;S. J. Qian;D. Wang;L. Zhang;W. Zou;C. Avila;C. A. Carrillo Montoya;J. P. Gomez;B. Gomez Moreno;J. C. Sanabria;N. Godinovic;D. Lelas;R. Plestina;D. Polic;I. Puljak;Z. Antunovic;M. Kovac;V. Brigljevic;S. Duric;K. Kadija;J. Luetic;D. Mekterovic;S. Morovic;L. Tikvica;A. Attikis;G. Mavromanolakis;J. Mousa;C. Nicolaou;F. Ptochos;P. A. Razis;M. Finger;M. Finger;Y. Assran;A. Ellithi Kamel;M. A. Mahmoud;A. Mahrous;A. Radi;M. Kadastik;M. Müntel;M. Murumaa;M. Raidal;L. Rebane;A. Tiko;P. Eerola;G. Fedi;M. Voutilainen;J. Härkönen;V. Karimäki;R. Kinnunen;M. J. Kortelainen;T. Lampén;K. Lassila-Perini;S. Lehti;T. Lindén;P. Luukka;T. Mäenpää;T. Peltola;E. Tuominen;J. Tuominiemi;E. Tuovinen;L. Wendland;A. Korpela;T. Tuuva;M. Besancon;S. Choudhury;F. Couderc;M. Dejardin;D. Denegri;B. Fabbro;J. L. Faure;F. Ferri;S. Ganjour;A. Givernaud;P. Gras;G. Hamel de Monchenault;P. Jarry;E. Locci;J. Malcles;L. Millischer;A. Nayak;J. Rander;A. Rosowsky;M. Titov;S. Baffioni;F. Beaudette;L. Benhabib;L. Bianchini;M. Bluj;P. Busson;C. Charlot;N. Daci;T. Dahms;M. Dalchenko;L. Dobrzynski;A. Florent;R. Granier de Cassagnac;M. Haguenauer;P. Miné;C. Mironov;I. N. Naranjo;M. Nguyen;C. Ochando;P. Paganini;D. Sabes;R. Salerno;Y. Sirois;C. Veelken;A. Zabi;J.-L. Agram;J. Andrea;D. Bloch;D. Bodin;J.-M. Brom;E. C. Chabert;C. Collard;E. Conte;F. Drouhin;J.-C. Fontaine;D. Gelé;U. Goerl
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