Measurement of the relative prompt production rate of χc2 and χc1 in pp collisions at [Formula: see text]

. 2012 ; 72 (12) : 2251. [epub] 20121214

Status PubMed-not-MEDLINE Jazyk angličtina Země Francie Médium print-electronic

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/pmid25814834

A measurement is presented of the relative prompt production rate of χc2 and χc1 with 4.6 fb-1 of data collected by the CMS experiment at the LHC in pp collisions at [Formula: see text]. The two states are measured via their radiative decays χc→J/ψ+γ, with the photon converting into an e+e- pair for J/ψ rapidity |y(J/ψ)|<1.0 and photon transverse momentum pT(γ)>0.5 GeV/c. The measurement is given for six intervals of pT(J/ψ) between 7 and 25 GeV/c. The results are compared to theoretical predictions.

1 Physikalisches Institut RWTH Aachen University Aachen Germany

3 Physikalisches Institut A RWTH Aachen University Aachen Germany

3 Physikalisches Institut B RWTH Aachen University Aachen Germany

Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt

Baylor University Waco USA

Benemerita Universidad Autonoma de Puebla Puebla Mexico

Bhabha Atomic Research Centre Mumbai India

Bogazici University Istanbul Turkey

Boston University Boston USA

Brown University Providence USA

Brunel University Uxbridge United Kingdom

California Institute of Technology Pasadena USA

Carnegie Mellon University Pittsburgh USA

Centre de Calcul de l'Institut National de Physique Nucleaire et de Physique des Particules CNRS IN2P3 Villeurbanne France

Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil

Centro de Investigacion y de Estudios Avanzados del IPN Mexico City Mexico

Centro de Investigaciones Energéticas Medioambientales y Tecnológicas Madrid Spain

CERN European Organization for Nuclear Research Geneva Switzerland

Charles University Prague Czech Republic

Cornell University Ithaca USA

Cukurova University Adana Turkey

Department of Physics University of Helsinki Helsinki Finland

Deutsches Elektronen Synchrotron Hamburg Germany

DSM IRFU CEA Saclay Gif sur Yvette France

Faculty of Physics and Vinca Institute of Nuclear Sciences University of Belgrade Belgrade Serbia

Fairfield University Fairfield USA

Fermi National Accelerator Laboratory Batavia USA

Florida Institute of Technology Melbourne USA

Florida International University Miami USA

Florida State University Tallahassee USA

Ghent University Ghent Belgium

Helsinki Institute of Physics Helsinki Finland

Imperial College London United Kingdom

INFN Laboratori Nazionali di Frascati Frascati Italy

INFN Sezione di Bari Bari Italy

INFN Sezione di Bologna Bologna Italy

INFN Sezione di Catania Catania Italy

INFN Sezione di Firenze Firenze Italy

INFN Sezione di Genova Genova Italy

INFN Sezione di Milano Bicocca Milano Italy

INFN Sezione di Napoli Napoli Italy

INFN Sezione di Padova Padova Italy

INFN Sezione di Pavia Pavia Italy

INFN Sezione di Perugia Perugia Italy

INFN Sezione di Pisa Pisa Italy

INFN Sezione di Roma Roma Italy

INFN Sezione di Torino Torino Italy

INFN Sezione di Trieste Trieste Italy

Institut für Experimentelle Kernphysik Karlsruhe Germany

Institut für Hochenergiephysik der OeAW Wien Austria

Institut Pluridisciplinaire Hubert Curien Université de Strasbourg Université de Haute Alsace Mulhouse CNRS IN2P3 Strasbourg France

Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria

Institute for Nuclear Research Moscow Russia

Institute for Particle Physics ETH Zurich Zurich Switzerland

Institute for Research in Fundamental Sciences Tehran Iran

Institute for Theoretical and Experimental Physics Moscow Russia

Institute for Universe and Elementary Particles Chonnam National University Kwangju Korea

Institute of Experimental Physics Faculty of Physics University of Warsaw Warsaw Poland

Institute of High Energy Physics and Informatization Tbilisi State University Tbilisi Georgia

Institute of High Energy Physics Beijing China

Institute of Nuclear Physics Demokritos Aghia Paraskevi Greece

Institute of Nuclear Research ATOMKI Debrecen Hungary

Institute Rudjer Boskovic Zagreb Croatia

Instituto de Física de Cantabria CSIC Universidad de Cantabria Santander Spain

Instituto de Fisica Teorica Universidade Estadual Paulista Sao Paulo Brazil

Istanbul Technical University Istanbul Turkey

Johns Hopkins University Baltimore USA

Joint Institute for Nuclear Research Dubna Russia

Kangwon National University Chunchon Korea

Kansas State University Manhattan USA

KFKI Research Institute for Particle and Nuclear Physics Budapest Hungary

Korea University Seoul Korea

Kyungpook National University Daegu Korea

Laboratoire Leprince Ringuet Ecole Polytechnique IN2P3 CNRS Palaiseau France

Laboratório de Instrumentação e Física Experimental de Partículas Lisboa Portugal

Lappeenranta University of Technology Lappeenranta Finland

Lawrence Livermore National Laboratory Livermore USA

Massachusetts Institute of Technology Cambridge USA

Middle East Technical University Physics Department Ankara Turkey

Moscow State University Moscow Russia

National Central University Chung Li Taiwan

National Centre for Nuclear Research Swierk Poland

National Centre for Particle and High Energy Physics Minsk Belarus

National Centre for Physics Quaid 1 Azam University Islamabad Pakistan

National Institute of Chemical Physics and Biophysics Tallinn Estonia

National Scientific Center Kharkov Institute of Physics and Technology Kharkov Ukraine

National Taiwan University Taipei Taiwan

Northeastern University Boston USA

Northwestern University Evanston USA

P N Lebedev Physical Institute Moscow Russia

Panjab University Chandigarh India

Paul Scherrer Institut Villigen Switzerland

Petersburg Nuclear Physics Institute Gatchina Russia

Politecnico di Bari Bari Italy

Princeton University Princeton USA

Purdue University Calumet Hammond USA

Purdue University West Lafayette USA

Rice University Houston USA

Rutgers the State University of New Jersey Piscataway USA

Rutherford Appleton Laboratory Didcot United Kingdom

Saha Institute of Nuclear Physics Kolkata India

Scuola Normale Superiore di Pisa Pisa Italy

State Key Lab of Nucl Phys and Tech Peking University Beijing China

State Research Center of Russian Federation Institute for High Energy Physics Protvino Russia

State University of New York at Buffalo Buffalo USA

Sungkyunkwan University Suwon Korea

Tata Institute of Fundamental Research EHEP Mumbai India

Tata Institute of Fundamental Research HECR Mumbai India

Technical University of Split Split Croatia

Texas A and M University College Station USA

Texas Tech University Lubbock USA

The Ohio State University Columbus USA

The Rockefeller University New York USA

The University of Alabama Tuscaloosa USA

The University of Iowa Iowa City USA

The University of Kansas Lawrence USA

Universidad Autónoma de Madrid Madrid Spain

Universidad Autónoma de San Luis Potosí San Luis Potosí Mexico

Universidad de Los Andes Bogota Colombia

Universidad de Oviedo Oviedo Spain

Universidad Iberoamericana Mexico City Mexico

Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil

Università del Piemonte Orientale Torino Italy

Università di Bari Bari Italy

Università di Bologna Bologna Italy

Università di Catania Catania Italy

Università di Firenze Firenze Italy

Università di Genova Genova Italy

Università di Milano Bicocca Milano Italy

Università di Napoli Federico 2 Napoli Italy

Università di Padova Padova Italy

Università di Pavia Pavia Italy

Università di Perugia Perugia Italy

Università di Pisa Pisa Italy

Università di Roma Roma Italy

Università di Torino Torino Italy

Università di Trento Padova Italy

Università di Trieste Trieste Italy

Universität Zürich Zurich Switzerland

Université Catholique de Louvain Louvain la Neuve Belgium

Université de Lyon Université Claude Bernard Lyon 1 CNRS IN2P3 Institut de Physique Nucléaire de Lyon Villeurbanne France

Université de Mons Mons Belgium

Université Libre de Bruxelles Bruxelles Belgium

Universiteit Antwerpen Antwerpen Belgium

University of Athens Athens Greece

University of Auckland Auckland New Zealand

University of Bristol Bristol United Kingdom

University of California Davis Davis USA

University of California Los Angeles Los Angeles USA

University of California Riverside Riverside USA

University of California San Diego La Jolla USA

University of California Santa Barbara Santa Barbara USA

University of Canterbury Christchurch New Zealand

University of Colorado at Boulder Boulder USA

University of Cyprus Nicosia Cyprus

University of Debrecen Debrecen Hungary

University of Delhi Delhi India

University of Florida Gainesville USA

University of Hamburg Hamburg Germany

University of Illinois at Chicago Chicago USA

University of Ioánnina Ioánnina Greece

University of Maryland College Park USA

University of Minnesota Minneapolis USA

University of Mississippi Oxford USA

University of Nebraska Lincoln Lincoln USA

University of Notre Dame Notre Dame USA

University of Puerto Rico Mayaguez USA

University of Rochester Rochester USA

University of Seoul Seoul Korea

University of Sofia Sofia Bulgaria

University of Split Split Croatia

University of Tennessee Knoxville USA

University of Virginia Charlottesville USA

University of Wisconsin Madison USA

Vanderbilt University Nashville USA

Vilnius University Vilnius Lithuania

Vrije Universiteit Brussel Brussel Belgium

Wayne State University Detroit USA

Yerevan Physics Institute Yerevan Armenia

Zobrazit více v PubMed

CDF Collaboration Inclusive J/ψ, ψ(2S) and b quark production in [Formula: see text] collisions at [Formula: see text] Phys. Rev. Lett. 1992;69:3704. doi: 10.1103/PhysRevLett.69.3704. PubMed DOI

CDF Collaboration J/ψ and ψ(2S) production in [Formula: see text] collisions at [Formula: see text] Phys. Rev. Lett. 1997;79:572. doi: 10.1103/PhysRevLett.79.572. DOI

Krämer M. Quarkonium production at high-energy colliders. Prog. Part. Nucl. Phys. 2001;47:141. doi: 10.1016/S0146-6410(01)00154-5. DOI

CDF Collaboration Measurement of [Formula: see text] in [Formula: see text] collisions at [Formula: see text] Phys. Rev. Lett. 2007;98:232001. doi: 10.1103/PhysRevLett.98.232001. PubMed DOI

LHCb Collaboration Measurement of the cross-section ratio σ(χc2)/σ(χc1) for prompt χc production at [Formula: see text] Phys. Lett. B. 2012;714:215. doi: 10.1016/j.physletb.2012.06.077. DOI

Baranov S.P. σ(χc1)/σ(χc2) ratio in the kt-factorization approach. Phys. Rev. D. 2011;83:034035. doi: 10.1103/PhysRevD.83.034035. DOI

Ma Y.-Q., Wang K., Chao K.-T. QCD radiative corrections to χcJ production at hadron colliders. Phys. Rev. D. 2011;83:111503. doi: 10.1103/PhysRevD.83.111503. DOI

CMS Collaboration The CMS experiment at the CERN LHC. J. Instrum. 2008;3:S08004. doi: 10.1088/1748-0221/3/08/S08004. DOI

Beringer J., Particle Data Group et al. Review of particle physics. Phys. Rev. D. 2012;86:010001. doi: 10.1103/PhysRevD.86.010001. DOI

CMS Collaboration Performance of CMS muon reconstruction in cosmic-ray events. J. Instrum. 2010;5:T03022. doi: 10.1088/1748-0221/5/03/T03022. DOI

CMS Collaboration Prompt and non-prompt J/ψ production in pp collisions at [Formula: see text] Eur. Phys. J. C. 2011;71:1575. doi: 10.1140/epjc/s10052-011-1575-8. DOI

CMS Collaboration, Tracking and vertexing results from first collisions. CMS physics analysis summary CMS-PAS-TRK-10-001 (2010)

CMS Collaboration CMS tracking performance results from early LHC operation. Eur. Phys. J. C. 2010;70:1165. doi: 10.1140/epjc/s10052-010-1491-3. DOI

CMS Collaboration, Studies of tracker material in the CMS detector. CMS physics analysis summary CMS-PAS-TRK-10-003 (2010)

Sjöstrand T., Mrenna S., Skands P. PYTHIA 6.4 physics and manual. J. High Energy Phys. 2006;05:026. doi: 10.1088/1126-6708/2006/05/026. DOI

CMS Collaboration J/ψ and ψ(2S) production in pp collisions at [Formula: see text] J. High Energy Phys. 2012;02:011.

Agostinelli S., et al. Geant4—a simulation toolkit. Nucl. Instrum. Methods A. 2003;506:250. doi: 10.1016/S0168-9002(03)01368-8. DOI

Allison J., et al. Geant4 developments and applications. IEEE Trans. Nucl. Sci. 2006;53:270. doi: 10.1109/TNS.2006.869826. DOI

M.J. Oreglia, A study of the reactions ψ′→γγψ. PhD thesis, Stanford University, 1980. SLAC Report SLAC-R-236

E. Migliore, G. Sguazzoni, Altered scenarios of the CMS Tracker material for systematic uncertainties studies. Technical Report CMS-NOTE-2010-010, CERN (2010)

Faccioli P., et al. Determination of χc and χb polarizations from dilepton angular distributions in radiative decays. Phys. Rev. D. 2011;83:096001. doi: 10.1103/PhysRevD.83.096001. DOI

HERA-B Collaboration Production of the charmonium states χc1 and χc2 in proton nucleus interactions at [Formula: see text] Phys. Rev. D. 2009;79:012001. doi: 10.1103/PhysRevD.79.012001. DOI

Collins J.C., Soper D.E. Angular distribution of dileptons in high-energy hadron collisions. Phys. Rev. D. 1977;16:2219. doi: 10.1103/PhysRevD.16.2219. DOI

CDF Collaboration Production of J/ψ mesons from χc meson decays in [Formula: see text] collisions at [Formula: see text] Phys. Rev. Lett. 1997;79:578. doi: 10.1103/PhysRevLett.79.578. DOI

Likhoded A.K., Luchinsky A.V., Poslavsky S.V. Production of χb mesons at the LHC. Phys. Rev. D. 2012;86:074027. doi: 10.1103/PhysRevD.86.074027. DOI

Najít záznam

Citační ukazatele

Nahrávání dat ...

Možnosti archivace

Nahrávání dat ...