Measurement of associated production of z bosons with charm quark jets in pp collisions at √s=1.96 TeV

. 2014 Jan 31 ; 112 (4) : 042001. [epub] 20140127

Status PubMed-not-MEDLINE Jazyk angličtina Země Spojené státy americké Médium print-electronic

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid24580440

We present the first measurements of the ratios of cross sections σ(pp → Z+c jet)/σ(pp → Z+jet) and σ(pp → Z+c jet)/σ(pp → Z+b jet) for the associated production of a Z boson with at least one charm or bottom quark jet. Jets have transverse momentum ​pT(jet)​>20 GeV and pseudorapidity |​η(jet)​|<2.5. These cross section ratios are measured differentially as a function of jet and Z boson transverse momenta, based on 9.7 fb(-1) of pp collisions collected with the D0 detector at the Fermilab Tevatron Collider at √s=1.96 TeV. The measurements show significant deviations from perturbative QCD calculations and predictions from various event generators.

2 Physikalisches Institut Georg August Universität Göttingen Göttingen Germany

3 Physikalisches Institut A RWTH Aachen University Aachen Germany

Brookhaven National Laboratory Upton New York 11973 USA

Brown University Providence Rhode Island 02912 USA

CEA Irfu SPP Saclay France

Charles University Faculty of Mathematics and Physics Center for Particle Physics Prague Czech Republic

CINVESTAV Mexico City Mexico

CPPM Aix Marseille Université CNRS IN2P3 Marseille France

CPPM Aix Marseille Université CNRS IN2P3 Marseille France and Michigan State University East Lansing Michigan 48824 USA

Czech Technical University Prague Prague Czech Republic

Czech Technical University Prague Prague Czech Republic and CEA Irfu SPP Saclay France

Delhi University Delhi India

Fermi National Accelerator Laboratory Batavia Illinois 60510 USA

Fermi National Accelerator Laboratory Batavia Illinois 60510 USA and University of Rochester Rochester New York 14627 USA

Florida State University Tallahassee Florida 32306 USA

Imperial College London London SW7 2AZ United Kingdom

Indiana University Bloomington Indiana 47405 USA

Institució Catalana de Recerca i Estudis Avançats Barcelona Spain

Institut für Physik Universität Mainz Mainz Germany

Institute for High Energy Physics Protvino Russia

Institute for Theoretical and Experimental Physics Moscow Russia

Institute of Physics Academy of Sciences of the Czech Republic Prague Czech Republic

Iowa State University Ames Iowa 50011 USA

IPHC Université de Strasbourg CNRS IN2P3 Strasbourg France

IPNL Université Lyon 1 CNRS IN2P3 Villeurbanne France and Université de Lyon Lyon France

Joint Institute for Nuclear Research Dubna Russia

Korea Detector Laboratory Korea University Seoul Korea

LAFEX Centro Brasileiro de Pesquisas Físicas Rio de Janeiro Brazil

LAL Université Paris Sud CNRS IN2P3 Orsay France

Lancaster University Lancaster LA1 4YB United Kingdom

Langston University Langston Oklahoma 73050 USA

Louisiana Tech University Ruston Louisiana 71272 USA

LPC Université Blaise Pascal CNRS IN2P3 Clermont France

LPNHE Universités Paris 6 and 7 CNRS IN2P3 Paris France

LPSC Université Joseph Fourier Grenoble 1 CNRS IN2P3 Institut National Polytechnique de Grenoble Grenoble France

Ludwig Maximilians Universität München München Germany

Michigan State University East Lansing Michigan 48824 USA

Moscow State University Moscow Russia

Nikhef Science Park Amsterdam the Netherlands

Nikhef Science Park Amsterdam the Netherlands and Radboud University Nijmegen Nijmegen the Netherlands

Northeastern University Boston Massachusetts 02115 USA

Northern Illinois University DeKalb Illinois 60115 USA

Northwestern University Evanston Illinois 60208 USA

Oklahoma State University Stillwater Oklahoma 74078 USA

Panjab University Chandigarh India

Petersburg Nuclear Physics Institute St Petersburg Russia

Physikalisches Institut Universität Freiburg Freiburg Germany

Princeton University Princeton New Jersey 08544 USA

Purdue University Calumet Hammond Indiana 46323 USA

Rice University Houston Texas 77005 USA

Rutgers University Piscataway New Jersey 08855 USA

Southern Methodist University Dallas Texas 75275 USA

State University of New York Buffalo New York 14260 USA

State University of New York Stony Brook New York 11794 USA

Tata Institute of Fundamental Research Mumbai India

The University of Manchester Manchester M13 9PL United Kingdom

Universidad de los Andes Bogotá Colombia

Universidad San Francisco de Quito Quito Ecuador

Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil

Universidade Federal do ABC Santo André Brazil

University College Dublin Dublin Ireland

University of Arizona Tucson Arizona 85721 USA

University of California Riverside Riverside California 92521 USA

University of Illinois at Chicago Chicago Illinois 60607 USA

University of Kansas Lawrence Kansas 66045 USA

University of Michigan Ann Arbor Michigan 48109 USA

University of Mississippi University Mississippi 38677 USA

University of Nebraska Lincoln Nebraska 68588 USA

University of Notre Dame Notre Dame Indiana 46556 USA

University of Oklahoma Norman Oklahoma 73019 USA

University of Rochester Rochester New York 14627 USA

University of Science and Technology of China Hefei People's Republic of China

University of Texas Arlington Texas 76019 USA

University of Virginia Charlottesville Virginia 22904 USA

University of Washington Seattle Washington 98195 USA

Uppsala University Uppsala Sweden

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