Measurements of jet multiplicity and differential production cross sections of Z plus jets events in proton-proton collisions at √s=7 TeV

被引：36

作者：

Khachatryan, V. ^{[1
]}

Sirunyan, A. M. ^{[1
]}

Tumasyan, A. ^{[1
]}

Adam, W. ^{[2
]}

Bergauer, T. ^{[2
]}

Dragicevic, M. ^{[2
]}

Eroe, J. ^{[2
]}

Fabjan, C. ^{[2
,189
]}

Friedl, M. ^{[2
]}

Fruehwirth, R. ^{[2
,189
]}

Ghete, V. M. ^{[2
]}

Hartl, C. ^{[2
]}

Hoermann, N. ^{[2
]}

Hrubec, J. ^{[2
]}

Jeitler, M. ^{[2
,189
]}

Kiesenhofer, W. ^{[2
]}

Knuenz, V. ^{[2
]}

Krammer, M. ^{[2
,189
]}

Kraetschmer, I. ^{[2
]}

Liko, D. ^{[2
]}

Mikulec, I. ^{[2
]}

Rabady, D. ^{[2
,190
]}

Rahbaran, B. ^{[2
]}

Rohringer, H. ^{[2
]}

Schoefbeck, R. ^{[2
]}

Strauss, J. ^{[2
]}

Taurok, A. ^{[2
]}

Treberer-Treberspurg, W. ^{[2
]}

Waltenberger, W. ^{[2
]}

Wulz, C. -E. ^{[2
,189
]}

Mossolov, V. ^{[3
]}

Shumeiko, N. ^{[3
]}

Gonzalez, J. Suarez ^{[3
]}

Alderweireldt, S. ^{[4
]}

Bansal, M. ^{[4
]}

Bansal, S. ^{[4
]}

Cornelis, T. ^{[4
]}

De Wolf, E. A. ^{[4
]}

Janssen, X. ^{[4
]}

Knutsson, A. ^{[4
]}

Luyckx, S. ^{[4
]}

Ochesanu, S. ^{[4
]}

Roland, B. ^{[4
]}

Rougny, R. ^{[4
]}

De Klundert, M. Van ^{[4
]}

Van Haevermaet, H. ^{[4
]}

Van Mechelen, P. ^{[4
]}

Van Remortel, N. ^{[4
]}

Van Spilbeeck, A. ^{[4
]}

Blekman, F. ^{[5
]}

机构：

[1] Yerevan Phys Inst, Yerevan 375036, Armenia

[2] Inst Hochenergiephys OeAW, Vienna, Austria

[3] Natl Ctr Particle & High Energy Phys, Minsk, BELARUS

[4] Univ Antwerp, Antwerp, Belgium

[5] Vrije Univ Brussel, Brussels, Belgium

[6] Univ Libre Bruxelles, Brussels, Belgium

[7] Univ Ghent, B-9000 Ghent, Belgium

[8] Catholic Univ Louvain, Louvain La Neuve, Belgium

[9] Univ Mons, B-7000 Mons, Belgium

[10] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[11] Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil

[12] Univ Estadual Paulista, Sao Paulo, Brazil

[13] Univ Fed ABC, Sao Paulo, Brazil

[14] Inst Nucl Energy Res, Sofia, Bulgaria

[15] Univ Sofia, BU-1126 Sofia, Bulgaria

[16] Inst High Energy Phys, Beijing 100039, Peoples R China

[17] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[18] Univ Los Andes, Bogota, Colombia

[19] Univ Split, Fac Elect Engn, Mech Engn & Naval Architecture, Split, Croatia

[20] Univ Split, Fac Sci, Split, Croatia

[21] Rudjer Boskovic Inst, Zagreb, Croatia

[22] Univ Cyprus, CY-1678 Nicosia, Cyprus

[23] Charles Univ Prague, Prague, Czech Republic

[24] Acad Sci Res & Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt

[25] NICPB, Tallinn, Estonia

[26] Univ Helsinki, Dept Phys, Helsinki, Finland

[27] Helsinki Inst Phys, Helsinki, Finland

[28] Lappeenranta Univ Technol, Lappeenranta, Finland

[29] CEA Saclay, DSM IRFU, F-91191 Gif Sur Yvette, France

[30] Ecole Polytech, IN2P3 CNRS, Lab Leprince Ringuet, Palaiseau, France

[31] Univ Strasbourg, Univ Haute Alsace Mulhouse, Inst Puridisciplinaire Hubert Curien, CNRS IN2P3, Strasbourg, France

[32] Ctr Calcul Inst Natl Phys Nucl & Phys Particules, CNRS IN2P3, Villeurbanne, France

[33] Univ Lyon 1, Univ Lyon, Inst Phys Nucl Lyon, CNRS IN2P3, F-69622 Villeurbanne, France

[34] Tbilisi State Univ, Inst High Energy Phys & Informatizat, GE-380086 Tbilisi, Georgia

[35] RWTH Aachen Univ I, Inst Phys, Aachen, Germany

[36] RWTH Aachen Univ III, Phys Inst A, Aachen, Germany

[37] RWTH Aachen Univ III, Phys Inst B, Aachen, Germany

[38] DESY, Hamburg, Germany

[39] Univ Hamburg, Hamburg, Germany

[40] Inst Expt Kernphys, Karlsruhe, Germany

[41] NCSR Demokritos, Inst Nucl & Particle Phys, Aghia Paraskevi, Greece

[42] Univ Athens, Athens, Greece

[43] Univ Ioannina, GR-45110 Ioannina, Greece

[44] Wigner Res Ctr Phys, Budapest, Hungary

[45] Inst Nucl Res ATOMKI, Debrecen, Hungary

[46] Univ Debrecen, Debrecen, Hungary

[47] Natl Inst Sci Educ & Res, Bhubaneswar, Orissa, India

[48] Panjab Univ, Chandigarh 160014, India

[49] Univ Delhi, Delhi 110007, India

[50] Saha Inst Nucl Phys, Kolkata, India

来源：

PHYSICAL REVIEW D | 2015年 / 91卷 / 05期

基金：

英国科学技术设施理事会; 美国国家科学基金会; 芬兰科学院; 欧洲研究理事会; 巴西圣保罗研究基金会; 奥地利科学基金会; 俄罗斯基础研究基金会;

关键词：

PARTON DISTRIBUTIONS;

D O I：

10.1103/PhysRevD.91.052008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Measurements of differential cross sections are presented for the production of a Z boson and at least one hadronic jet in proton-proton collisions at root s = 7 TeV, recorded by the CMS detector, using a data sample corresponding to an integrated luminosity of 4.9 fb(-1). The jet multiplicity distribution is measured for up to six jets. The differential cross sections are measured as a function of jet transverse momentum and pseudorapidity for the four highest transverse momentum jets. The distribution of the scalar sum of jet transverse momenta is also measured as a function of the jet multiplicity. The measurements are compared with theoretical predictions at leading and next-to-leading order in perturbative QCD.

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