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

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F18%3A00492085" target="_blank" >RIV/61389005:_____/18:00492085 - isvavai.cz</a>

  • Alternative codes found

    RIV/68378271:_____/18:00492085 RIV/68407700:21340/18:00328372

  • Result on the web

    <a href="http://dx.doi.org/10.1140/epjc/s10052-018-6027-2" target="_blank" >http://dx.doi.org/10.1140/epjc/s10052-018-6027-2</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1140/epjc/s10052-018-6027-2" target="_blank" >10.1140/epjc/s10052-018-6027-2</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

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

  • Original language description

    We report on the measurement of the inclusive J/psi polarization parameters in pp collisions at a center of mass energy root 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/psi 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 (lambda(theta), lambda(phi), lambda(theta phi)) are measured as a function of pT both in the helicity and Collins-Soper reference frames. The measured J/psi 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 root s = 7 TeV.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10304 - Nuclear physics

Result continuities

  • Project

    <a href="/en/project/LTT17018" target="_blank" >LTT17018: Getting new knowledge of the microworld using the CERN infrastructure</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2018

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    European Physical Journal C

  • ISSN

    1434-6044

  • e-ISSN

  • Volume of the periodical

    78

  • Issue of the periodical within the volume

    7

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    16

  • Pages from-to

  • UT code for WoS article

    000438114500002

  • EID of the result in the Scopus database

    2-s2.0-85049776261