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Published November 25, 2013 | Supplemental Material + Published + Submitted
Journal Article Open

Measurement of the ϒ(1S), ϒ(2S), and ϒ(3S) cross sections in pp collisions at √s = 7 TeV


The ϒ(1S), ϒ(2S), and ϒ(3S) production cross sections are measured using a data sample corresponding to an integrated luminosity of 35.8 ± 1.4 pb^(−1) of proton–proton collisions at √s = 7 TeV , collected with the CMS detector at the LHC. The ϒ resonances are identified through their decays to dimuons. Integrated over the ϒ transverse momentum range p^ ϒ _T < 50 GeV/c and rapidity range |y^ϒ| < 2.4, and assuming unpolarized ϒ production, the products of the ϒ production cross sections and dimuon branching fractions are σ (pp → ϒ(1S) X ) • B (ϒ(1S) → µ^(+) µ^(-)) = (8.55 ± 0.05^(+0.56)_(-0.50) ± 0.34) nb, σ (pp → ϒ(2S) X ) • B (ϒ(2S) → µ^(+) µ^(-)) = (2.21 ± 0.03^(+0.16)_(-0.14) ± 0.09) nb, σ (pp → ϒ(3S) X ) • B (ϒ(3S) → µ^(+) µ^(-)) = (1.11 ± 0.02^(+0.10)_(-0.08) ± 0.04) nb, where the first uncertainty is statistical, the second is systematic, and the third is from the uncertainty in the integrated luminosity. The differential cross sections in bins of transverse momentum and rapidity, and the cross section ratios are presented. Cross section measurements performed within a restricted muon kinematic range and not corrected for acceptance are also provided. These latter measurements are independent of ϒ polarization assumptions. The results are compared to theoretical predictions and previous measurements.

Additional Information

© 2013 CERN. Published by Elsevier B.V. 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. Received 24 March 2013; Revised 10 October 2013; Accepted 14 October 2013; Available online 21 October 2013. 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); and the HOMING PLUS programme of Foundation for Polish Science, cofinanced from European Union, Regional Development Fund.

Attached Files

Published - 1-s2.0-S0370269313008393-main.pdf

Submitted - 1303.5900v2.pdf

Supplemental Material - mmc1.pdf


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August 22, 2023
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