Υ(nS) polarizations versus particle multiplicity in pp collisions at s=7 TeV

CMS Collaboration

doi:10.1016/j.physletb.2016.07.065

Υ(nS) polarizations versus particle multiplicity in pp collisions at s=7 TeV

CMS Collaboration

Yerevan Physics Institute
Institut für Hochenergiephysik
Vienna University of Technology
European Organization for Nuclear Research
National Centre for Particle and High Energy Physics
Universite Paris-Saclay
Imperial College London

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

10 Citations (Scopus)

Résumé

The polarizations of the ϒ(1S), ϒ(2S), and ϒ(3S) mesons are measured as a function of the charged particle multiplicity in proton–proton collisions at s=7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb⁻¹. The results are extracted from the dimuon decay angular distributions, in two ranges of ϒ(nS) transverse momentum (10–15 and 15–35 GeV), and in the rapidity interval |y|>1.2. The results do not show significant changes from low- to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the ϒ(2S) and ϒ(3S) cases.

langue originale	Anglais
Pages (de - à)	31-52
Nombre de pages	22
journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	761
Les DOIs	https://doi.org/10.1016/j.physletb.2016.07.065
état	Publié - 10 oct. 2016

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10.1016/j.physletb.2016.07.065

Contient cette citation

@article{5d95abfa15fa4f088d786bdba39d480d,

title = "Υ(nS) polarizations versus particle multiplicity in pp collisions at s=7 TeV",

abstract = "The polarizations of the ϒ(1S), ϒ(2S), and ϒ(3S) mesons are measured as a function of the charged particle multiplicity in proton{\textendash}proton collisions at s=7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb−1. The results are extracted from the dimuon decay angular distributions, in two ranges of ϒ(nS) transverse momentum (10{\textendash}15 and 15{\textendash}35 GeV), and in the rapidity interval |y|>1.2. The results do not show significant changes from low- to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the ϒ(2S) and ϒ(3S) cases.",

keywords = "CMS, Physics, QCD medium effects, Quarkonium polarization, Quarkonium production",

author = "\{CMS Collaboration\} and V. Khachatryan and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and C. Fabjan and M. Flechl and M. Friedl and R. Fr{\"u}hwirth and Ghete, \{V. M.\} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and V. Kn{\"u}nz and A. K{\"o}nig and M. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Matsushita and I. Mikulec and D. Rabady and N. Rad and B. Rahbaran and H. Rohringer and J. Schieck and R. Sch{\"o}fbeck and J. Strauss and W. Treberer-Treberspurg and W. Waltenberger and Wulz, \{C. E.\} and V. Mossolov and A. Zghiche and F. Beaudette and C. Charlot and O. Davignon and \{Granierde Cassagnac\}, R. and M. Nguyen and C. Ochando and P. Paganini and R. Salerno and Sauvan, \{J. B.\} and Y. Sirois and A. Zabi and \{De Wit\}, A.",

note = "Publisher Copyright: {\textcopyright} 2016 The Author(s)",

year = "2016",

month = oct,

day = "10",

doi = "10.1016/j.physletb.2016.07.065",

language = "English",

volume = "761",

pages = "31--52",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Υ(nS) polarizations versus particle multiplicity in pp collisions at s=7 TeV

AU - CMS Collaboration

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Fabjan, C.

AU - Flechl, M.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Knünz, V.

AU - König, A.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rad, N.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Treberer-Treberspurg, W.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Zghiche, A.

AU - Beaudette, F.

AU - Charlot, C.

AU - Davignon, O.

AU - Granierde Cassagnac, R.

AU - Nguyen, M.

AU - Ochando, C.

AU - Paganini, P.

AU - Salerno, R.

AU - Sauvan, J. B.

AU - Sirois, Y.

AU - Zabi, A.

AU - De Wit, A.

PY - 2016/10/10

Y1 - 2016/10/10

N2 - The polarizations of the ϒ(1S), ϒ(2S), and ϒ(3S) mesons are measured as a function of the charged particle multiplicity in proton–proton collisions at s=7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb−1. The results are extracted from the dimuon decay angular distributions, in two ranges of ϒ(nS) transverse momentum (10–15 and 15–35 GeV), and in the rapidity interval |y|>1.2. The results do not show significant changes from low- to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the ϒ(2S) and ϒ(3S) cases.

AB - The polarizations of the ϒ(1S), ϒ(2S), and ϒ(3S) mesons are measured as a function of the charged particle multiplicity in proton–proton collisions at s=7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb−1. The results are extracted from the dimuon decay angular distributions, in two ranges of ϒ(nS) transverse momentum (10–15 and 15–35 GeV), and in the rapidity interval |y|>1.2. The results do not show significant changes from low- to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the ϒ(2S) and ϒ(3S) cases.

KW - CMS

KW - Physics

KW - QCD medium effects

KW - Quarkonium polarization

KW - Quarkonium production

U2 - 10.1016/j.physletb.2016.07.065

DO - 10.1016/j.physletb.2016.07.065

M3 - Article

AN - SCOPUS:84982307188

SN - 0370-2693

VL - 761

SP - 31

EP - 52

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Υ(nS) polarizations versus particle multiplicity in pp collisions at s=7 TeV

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