Measurement of the Y(nS) polarizations in pp collisions at s=7\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \sqrt{s}=7 $$\end{document} and 8 TeV

被引:0
作者
R. Aaij
B. Adeva
M. Adinolfi
Z. Ajaltouni
S. Akar
J. Albrecht
F. Alessio
M. Alexander
A. Alfonso Albero
S. Ali
G. Alkhazov
P. Alvarez Cartelle
A. A. Alves
S. Amato
S. Amerio
Y. Amhis
L. An
L. Anderlini
G. Andreassi
M. Andreotti
J. E. Andrews
R. B. Appleby
F. Archilli
P. d’Argent
J. Arnau Romeu
A. Artamonov
M. Artuso
E. Aslanides
G. Auriemma
M. Baalouch
I. Babuschkin
S. Bachmann
J. J. Back
A. Badalov
C. Baesso
S. Baker
V. Balagura
W. Baldini
A. Baranov
R. J. Barlow
C. Barschel
S. Barsuk
W. Barter
F. Baryshnikov
V. Batozskaya
V. Battista
A. Bay
L. Beaucourt
J. Beddow
F. Bedeschi
机构
[1] Centro Brasileiro de Pesquisas Físicas (CBPF),Center for High Energy Physics
[2] Universidade Federal do Rio de Janeiro (UFRJ),I. Physikalisches Institut
[3] Tsinghua University,Fakultät Physik
[4] LAPP,School of Physics
[5] Université Savoie Mont-Blanc,Institute of Nuclear Physics
[6] CNRS/IN2P3,Institute of Physics
[7] Clermont Université,Physik
[8] Université Blaise Pascal,Institut
[9] CNRS/IN2P3,H.H. Wills Physics Laboratory
[10] LPC,Cavendish Laboratory
[11] Aix Marseille Univ,Department of Physics
[12] CNRS/IN2P3,School of Physics and Astronomy
[13] CPPM,School of Physics and Astronomy
[14] LAL,Oliver Lodge Laboratory
[15] Université Paris-Sud,School of Physics and Astronomy
[16] CNRS/IN2P3,Department of Physics
[17] LPNHE,School of Physics and Technology
[18] Université Pierre et Marie Curie,Institute of Particle Physics
[19] Université Paris Diderot,Departamento de Fisica
[20] CNRS/IN2P3,Institut für Physik
[21] RWTH Aachen University,Instituto de Fisica Corpuscular
[22] Technische Universität Dortmund,Van Swinderen Institute
[23] Max-Planck-Institut für Kernphysik (MPIK),undefined
[24] Physikalisches Institut,undefined
[25] Ruprecht-Karls-Universität Heidelberg,undefined
[26] University College Dublin,undefined
[27] Sezione INFN di Bari,undefined
[28] Sezione INFN di Bologna,undefined
[29] Sezione INFN di Cagliari,undefined
[30] Universita e INFN,undefined
[31] Ferrara,undefined
[32] Sezione INFN di Firenze,undefined
[33] Laboratori Nazionali dell’INFN di Frascati,undefined
[34] Sezione INFN di Genova,undefined
[35] Universita & INFN,undefined
[36] Milano-Bicocca,undefined
[37] Sezione di Milano,undefined
[38] Sezione INFN di Padova,undefined
[39] Sezione INFN di Pisa,undefined
[40] Sezione INFN di Roma Tor Vergata,undefined
[41] Sezione INFN di Roma La Sapienza,undefined
[42] Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences,undefined
[43] AGH - University of Science and Technology,undefined
[44] Faculty of Physics and Applied Computer Science,undefined
[45] National Center for Nuclear Research (NCBJ),undefined
[46] Horia Hulubei National Institute of Physics and Nuclear Engineering,undefined
[47] Petersburg Nuclear Physics Institute (PNPI),undefined
[48] Institute of Theoretical and Experimental Physics (ITEP),undefined
[49] Moscow State University (SINP MSU),undefined
[50] Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN),undefined
关键词
Hadron-Hadron scattering (experiments); Particle and resonance production; Polarization; QCD;
D O I
10.1007/JHEP12(2017)110
中图分类号
学科分类号
摘要
The polarization of the Y(1S), Y(2S) and Y(3S) mesons, produced in pp collisions at centre-of-mass energies s=7\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \sqrt{s}=7 $$\end{document} and 8 TeV, is measured using data samples collected by the LHCb experiment, corresponding to integrated luminosities of 1 and 2 fb−1, respectively. The measurements are performed in three polarization frames, using Y → μμ decays in the kinematic region of the transverse momentum pTΥ < 30 GeV/c and rapidity 2.2 < yY < 4.5. No large polarization is observed. [graphic not available: see fulltext]
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