Measurement of the inclusive J/ ψ polarization at forward rapidity in pp collisions at √s=8 TeV

ALICE Collaboration

doi:10.1140/epjc/s10052-018-6027-2

Measurement of the inclusive J/ ψ polarization at forward rapidity in pp collisions at √s=8 TeV

ALICE Collaboration

Sección de Física

CERN
Variable Energy Cyclotron Centre
University of California at Berkeley
Czech Academy of Sciences
University of Lund
Panjab University
Politecnico di Torino
Indian Institute of Technology Bombay
Korea Institute of Science and Technology Information
Yale University
Alikhanov Institute for Theoretical and Experimental Physics
GSI Helmholtzzentrum für Schwerionenforschung
Universidade Estadual de Campinas
Russian Research Centre Kurchatov Institute
Sezione INFN
Universidad Nacional Autónoma de México
COMSATS University Islamabad
Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi
National Institute for Nuclear Physics
Bogolyubov Institute for Theoretical Physics Nasu
University of Bergen
Goethe University Frankfurt
St. Petersburg State University
National Institute for Physics and Nuclear Engineering
University of Birmingham
University of Münster
Ruprecht-Karls-Universität Heidelberg
Creighton University
Ruder Boskovic Institute
University of Houston
Lawrence Berkeley National Laboratory
Nantes Université
Technical University of Munich
Technische Universität München
University of Oslo
Aligarh Muslim University
Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN
Gangneung-Wonju National University
Inha University
University of Jammu
CNRS-IN2P3
Rheinische Friedrich-Wilhelms-Universität Bonn
National Institute of Science Education and Research
Hungarian Academy of Sciences
STFC Daresbury Laboratory
Université Clermont Auvergne
Central China Normal University
Wayne State University
Joint Institute for Nuclear Research
University of Copenhagen
Institute for Subatomic Physics of Utrecht University
Université de Strasbourg
Benemérita Universidad Autónoma de Puebla
Universidad Autonoma de Sinaloa
Moscow Engineering Physics Institute
Petersburg Nuclear Physics Institute (PNPI)
University of Tennessee
Gauhati University
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
INFN, Laboratori Nazionali Di Frascati
Faculty of Nuclear Sciences and Physical Engineering
Bose Institute
University of Texas at Austin
University of Pavia
Pavol Jozef Šafárik University
Università di Brescia
Pusan National University
University of Liverpool
Universidade de São Paulo
University of Helsinki
Russian Federal Nuclear Center (VNIIEF)
Austrian Academy of Sciences
University of Tsukuba
National Research Foundation
Ohio State University
Technical University of Košice
National Institute for Subatomic Physics
Pontifical Catholic Univ. of Peru
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
University of Jyväskylä
Saha Institute of Nuclear Physics
Universite Claude Bernard Lyon 1
University of Cape Town
Slovak Academy of Sciences
Université Grenoble Alpes
Centre de calcul de l'IN2P3
Oak Ridge National Laboratory
Università del Piemonte Orientale and Gruppo Collegato INFN
Universidade Federal do ABC
Institute of Physics Bhubaneswar
Institute of Space Science (ISS)
Indian Institute of Technology Indore
Frankfurt Institute for Advanced Studies
National Centre for Nuclear Studies
University of Zagreb
Institute for High Energy Physics
RAS - Institute for Nuclear Research
National and Kapodistrian University of Athens
Chicago State University
Universidade Federal do Rio Grande do Sul
University of Split
Warsaw University of Technology
A. Alikhanian Yerevan Institute of Physics
Tokyo University
Nagasaki Institute of Applied Science
Western Norway University of Applied Sciences
Centro de Investigación y de Estudios AVanzados (CINVESTAV)
Sejong University
Yonsei University
KTO Karatay University
Zentrum für Technologietransfer und Telekommunikation (ZTT)
Jeonbuk National University
California Polytechnic State University, San Luis Obispo
Suranaree University of Technology
University of South-Eastern Norway
China Institute of Atomic Energy
University of the Witwatersrand
Institute of Physics of the Czech Academy of Sciences
University of Rome La Sapienza
Comenius University
Budker Institute for Nuclear Physics
University of Rajasthan
National Nuclear Research Center
Eberhard Karls Universität Tübingen
Hiroshima University
Nara Women's University
Chinese Academy of Sciences
Indonesian Institute of Sciences

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

39 Citas (Scopus)

Resumen

We report on the measurement of the inclusive J/ψ polarization parameters in pp collisions at a center of mass energy s=8 TeV with the ALICE detector at the LHC. The analysis is based on a data sample corresponding to an integrated luminosity of 1.23 pb^{- 1}. J/ψ resonances are reconstructed in their di-muon decay channel in the rapidity interval 2.5 < y< 4.0 and over the transverse-momentum interval 2 < p_T< 15 GeV / c. The three polarization parameters (λ_θ, λ_φ, λ_θ_φ) are measured as a function of p_T both in the helicity and Collins-Soper reference frames. The measured J/ψ polarization parameters are found to be compatible with zero within uncertainties, contrary to expectations from all available predictions. The results are compared with the measurement in pp collisions at s=7 TeV.

Idioma original	Inglés
Número de artículo	562
Publicación	European Physical Journal C
Volumen	78
N.º	7
DOI	https://doi.org/10.1140/epjc/s10052-018-6027-2
Estado	Publicada - 1 jul. 2018

Acceder al documento

10.1140/epjc/s10052-018-6027-2

Otros archivos y enlaces

Enlace a la publicación en Scopus

Citar esto

@article{88c4b64ec092422a8a7840bc0b62c0de,

title = "Measurement of the inclusive J/ ψ polarization at forward rapidity in pp collisions at √s=8 TeV",

abstract = "We report on the measurement of the inclusive J/ψ polarization parameters in pp collisions at a center of mass energy s=8 TeV with the ALICE detector at the LHC. The analysis is based on a data sample corresponding to an integrated luminosity of 1.23 pb- 1. J/ψ resonances are reconstructed in their di-muon decay channel in the rapidity interval 2.5 < y< 4.0 and over the transverse-momentum interval 2 < pT< 15 GeV / c. The three polarization parameters (λθ, λφ, λθφ) are measured as a function of pT both in the helicity and Collins-Soper reference frames. The measured J/ψ polarization parameters are found to be compatible with zero within uncertainties, contrary to expectations from all available predictions. The results are compared with the measurement in pp collisions at s=7 TeV.",

author = "\{ALICE Collaboration\} and S. Acharya and Acosta, \{F. T.\} and D. Adamov{\'a} and J. Adolfsson and Aggarwal, \{M. M.\} and \{Aglieri Rinella\}, G. and M. Agnello and N. Agrawal and Z. Ahammed and Ahn, \{S. U.\} and S. Aiola and A. Akindinov and M. Al-Turany and Alam, \{S. N.\} and Albuquerque, \{D. S.D.\} and D. Aleksandrov and B. Alessandro and \{Alfaro Molina\}, R. and Y. Ali and A. Alici and A. Alkin and J. Alme and T. Alt and L. Altenkamper and I. Altsybeev and C. Andrei and D. Andreou and Andrews, \{H. A.\} and A. Andronic and M. Angeletti and V. Anguelov and C. Anson and T. Anti{\v c}i{\'c} and F. Antinori and P. Antonioli and R. Anwar and N. Apadula and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and R. Arnaldi and Arnold, \{O. W.\} and Arsene, \{I. C.\} and M. Arslandok and B. Audurier and A. Augustinus and R. Averbeck and Azmi, \{M. D.\} and \{Bazo Alba\}, \{J. L.\} and Gago, \{A. M.\}",

note = "Publisher Copyright: {\textcopyright} 2018, CERN for the benefit of the ALICE collaboration.",

year = "2018",

month = jul,

day = "1",

doi = "10.1140/epjc/s10052-018-6027-2",

language = "English",

volume = "78",

journal = "European Physical Journal C",

issn = "1434-6044",

number = "7",

}

TY - JOUR

T1 - Measurement of the inclusive J/ ψ polarization at forward rapidity in pp collisions at √s=8 TeV

AU - ALICE Collaboration

AU - Acharya, S.

AU - Acosta, F. T.

AU - Adamová, D.

AU - Adolfsson, J.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahn, S. U.

AU - Aiola, S.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Alam, S. N.

AU - Albuquerque, D. S.D.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfaro Molina, R.

AU - Ali, Y.

AU - Alici, A.

AU - Alkin, A.

AU - Alme, J.

AU - Alt, T.

AU - Altenkamper, L.

AU - Altsybeev, I.

AU - Andrei, C.

AU - Andreou, D.

AU - Andrews, H. A.

AU - Andronic, A.

AU - Angeletti, M.

AU - Anguelov, V.

AU - Anson, C.

AU - Antičić, T.

AU - Antinori, F.

AU - Antonioli, P.

AU - Anwar, R.

AU - Apadula, N.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arnold, O. W.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Audurier, B.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Azmi, M. D.

AU - Bazo Alba, J. L.

AU - Gago, A. M.

PY - 2018/7/1

Y1 - 2018/7/1

N2 - We report on the measurement of the inclusive J/ψ polarization parameters in pp collisions at a center of mass energy s=8 TeV with the ALICE detector at the LHC. The analysis is based on a data sample corresponding to an integrated luminosity of 1.23 pb- 1. J/ψ resonances are reconstructed in their di-muon decay channel in the rapidity interval 2.5 < y< 4.0 and over the transverse-momentum interval 2 < pT< 15 GeV / c. The three polarization parameters (λθ, λφ, λθφ) are measured as a function of pT both in the helicity and Collins-Soper reference frames. The measured J/ψ polarization parameters are found to be compatible with zero within uncertainties, contrary to expectations from all available predictions. The results are compared with the measurement in pp collisions at s=7 TeV.

AB - We report on the measurement of the inclusive J/ψ polarization parameters in pp collisions at a center of mass energy s=8 TeV with the ALICE detector at the LHC. The analysis is based on a data sample corresponding to an integrated luminosity of 1.23 pb- 1. J/ψ resonances are reconstructed in their di-muon decay channel in the rapidity interval 2.5 < y< 4.0 and over the transverse-momentum interval 2 < pT< 15 GeV / c. The three polarization parameters (λθ, λφ, λθφ) are measured as a function of pT both in the helicity and Collins-Soper reference frames. The measured J/ψ polarization parameters are found to be compatible with zero within uncertainties, contrary to expectations from all available predictions. The results are compared with the measurement in pp collisions at s=7 TeV.

UR - https://www.scopus.com/pages/publications/85049776261

U2 - 10.1140/epjc/s10052-018-6027-2

DO - 10.1140/epjc/s10052-018-6027-2

M3 - Article

AN - SCOPUS:85049776261

SN - 1434-6044

VL - 78

JO - European Physical Journal C

JF - European Physical Journal C

IS - 7

M1 - 562

ER -

Measurement of the inclusive J/ ψ polarization at forward rapidity in pp collisions at √s=8 TeV

Resumen

Acceder al documento

Otros archivos y enlaces

Huella

Citar esto