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Measurement of the prompt J/ψ and ψ(2S) polarizations in pp collisions at √s = 7TeV

Chatrchyan, S. and Apresyan, A. and Bornheim, A. and Bunn, J. and Chen, Y. and Di Marco, E. and Duarte, J. and Kcira, D. and Ma, Y. and Mott, A. and Newman, H. B. and Pena, C. and Rogan, C. and Spiropulu, M. and Timciuc, V. and Veverka, J. and Wilkinson, R. and Xie, S. and Zhu, R. Y. and Dias, F. A. and Dubinin, M. (2013) Measurement of the prompt J/ψ and ψ(2S) polarizations in pp collisions at √s = 7TeV. Physics Letters B, 727 (4-5). pp. 381-402. ISSN 0370-2693. http://resolver.caltech.edu/CaltechAUTHORS:20140116-115254916

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Abstract

The polarizations of prompt J/ψ and ψ(2S) mesons are measured in proton–proton collisions at √s = 7TeV, using a dimuon data sample collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.9 fb^(−1). The prompt J/ψ and ψ(2S) polarization parameters λ_ϑ, λ_φ, and λ_(ϑφ), as well as the frame-invariant quantity √s = 7TeV, are measured from the dimuon decay angular distributions in three different polarization frames. The J/ψ results are obtained in the transverse momentum range 14<p_T<70 GeV, in the rapidity intervals |y|<0.6 and 0.6<|y|<1.2. The corresponding ψ(2S) results cover 14<p_T<50 GeV and include a third rapidity bin, 1.2<|y|<1.5. No evidence of large polarizations is seen in these kinematic regions, which extend much beyond those previously explored.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://www.sciencedirect.com/science/article/pii/S0370269313008629PublisherArticle
http://dx.doi.org/10.1016/j.physletb.2013.10.055DOIArticle
http://arxiv.org/abs/1307.6070arXivDiscussion Paper
Additional Information:© 2013 CERN. Published by Elsevier B.V. Received 23 July 2013 Received in revised form 24 October 2013. Accepted 25 October 2013. Available online 29 October 2013. Editor: M. Doser. This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited. We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centres and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MEYS (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); MoER, SF0690030s09 and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF and WCU (Republic of Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); MSI (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MON, RosAtom, RAS and RFBR (Russia); MSTD (Serbia); SEIDI and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); ThEPCenter, IPST and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie programme and the European Research Council and EPLANET (European Union); the Leventis Foundation; the A.P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans lʼIndustrie et dans lʼAgriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the Ministry of Education, Youth and Sports (MEYS) of Czech Republic; the Council of Science and Industrial Research, India; the Compagnia di San Paolo (Torino); the HOMING PLUS programme of Foundation for Polish Science, cofinanced by EU, Regional Development Fund; and the Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF.
Group:CMS@Caltech
Funders:
Funding AgencyGrant Number
BMWF and FWF (Austria)UNSPECIFIED
FNRS and FWO (Belgium) UNSPECIFIED
CNPq (Brazil)UNSPECIFIED
CAPES (Brazil)UNSPECIFIED
FAPERJ (Brazil)UNSPECIFIED
FAPESP (Brazil)UNSPECIFIED
MEYS (Bulgaria)UNSPECIFIED
CERNUNSPECIFIED
CASUNSPECIFIED
MoST (China)UNSPECIFIED
NSFC (China)UNSPECIFIED
COLCIENCIAS (Colombia)UNSPECIFIED
MSES (Croatia)UNSPECIFIED
RPF (Cyprus) UNSPECIFIED
MoERSF0690030s09
ERDF (Estonia)UNSPECIFIED
Academy of FinlandUNSPECIFIED
MEC (Finland)UNSPECIFIED
HIP (Finland)UNSPECIFIED
CEA and CNRS/IN2P3 (France)UNSPECIFIED
BMBF (Germany)UNSPECIFIED
DFG (Germany)UNSPECIFIED
HGF (Germany)UNSPECIFIED
GSRT (Greece)UNSPECIFIED
OTKA and NKTH (Hungary) UNSPECIFIED
DAE and DST (India) UNSPECIFIED
IPM (Iran)UNSPECIFIED
SFI (Ireland)UNSPECIFIED
INFN (Italy)UNSPECIFIED
NRF and WCU (Korea)UNSPECIFIED
LAS (Lithuania)UNSPECIFIED
CINVESTAV (Mexico)UNSPECIFIED
CONACYT (Mexico)UNSPECIFIED
SEP and UASLP-FAI (Mexico)UNSPECIFIED
MSI (New Zealand)UNSPECIFIED
PAEC (Pakistan)UNSPECIFIED
MSHE and NSC (Poland)UNSPECIFIED
FCT (Portugal)UNSPECIFIED
JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan)UNSPECIFIED
MONUNSPECIFIED
RosAtom UNSPECIFIED
RAS and RFBR (Russia)UNSPECIFIED
MSTD (Serbia)UNSPECIFIED
SEIDI and CPAN (Spain)UNSPECIFIED
Swiss Funding Agencies (Switzerland)UNSPECIFIED
NSC (Taipei)UNSPECIFIED
ThEPCenterUNSPECIFIED
IPST and NSTDA (Thailand)UNSPECIFIED
TUBITAK and TAEK (Turkey) UNSPECIFIED
NASU (Ukraine)UNSPECIFIED
STFC (United Kingdom)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Marie-Curie programme and the European Research Council and EPLANET (European Union)UNSPECIFIED
Leventis Foundation UNSPECIFIED
A .P. Sloan FoundationUNSPECIFIED
Alexander von Humboldt FoundationUNSPECIFIED
Belgian Federal Science Policy OfficeUNSPECIFIED
Fonds pour la Formation à la Recherche dans l’índustrie et dans l’Ágriculture (FRIA-Belgium)UNSPECIFIED
Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)UNSPECIFIED
Ministry of Education, Youth and Sports (MEYS) of Czech RepublicUNSPECIFIED
Council of Science and Industrial Research, IndiaUNSPECIFIED
Compagnia di San Paolo (Torino)UNSPECIFIED
HOMING PLUS programme of Foundation for Polish Science UNSPECIFIED
Regional Development FundUNSPECIFIED
Thalis and Aristeia programmes cofinanced by EU-ESFUNSPECIFIED
Greek NSRFUNSPECIFIED
Subject Keywords:CMS; Physics; Quarkonium production; Quarkonium polarization
Record Number:CaltechAUTHORS:20140116-115254916
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140116-115254916
Official Citation:CMS Collaboration, Measurement of the prompt and polarizations in pp collisions at, Physics Letters B, Volume 727, Issues 4–5, 18 December 2013, Pages 381-402, ISSN 0370-2693, http://dx.doi.org/10.1016/j.physletb.2013.10.055. (http://www.sciencedirect.com/science/article/pii/S0370269313008629)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43410
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:16 Jan 2014 23:41
Last Modified:16 Jan 2014 23:41

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