Počet záznamů: 1  

J/psi polarization in p plus p collisions at root s=200 GeV in STAR

  1. 1.
    0439720 - ÚJF 2015 RIV NL eng J - Článek v odborném periodiku
    Adamczyk, L. - Barnovská, Zuzana - Bielčík, J. - Bielčíková, Jana - Chaloupka, P. - Hajková, O. - Pachr, M. - Rusňák, Jan - Šumbera, Michal - Tlustý, David - Vértési, Robert … celkem 358 autorů
    J/psi polarization in p plus p collisions at root s=200 GeV in STAR.
    Physics Letters. B. Roč. 739, DEC (2014), s. 180-188. ISSN 0370-2693. E-ISSN 1873-2445
    Grant CEP: GA ČR GA13-20841S
    Institucionální podpora: RVO:61389005
    Klíčová slova: charmonia * polarization * spin alignment
    Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
    Impakt faktor: 6.131, rok: 2014

    e report on a polarization measurement of inclusive J/psi mesons in the di-electron decay channel at mid-rapidity at 2 < p(T) < 6 GeV/c in p + p collisions at root s = 200 GeV. Data were taken with the STAR detector at RHIC. The J/psi polarization measurement should help to distinguish between different models of the J/psi production mechanism since they predict different p(T) dependences of the J/psi polarization. In this analysis, J/psi is studied in the helicity frame. The polarization parameter lambda(theta) measured at RHIC becomes smaller towards high p(T), indicating more longitudinal J/psi polarization as p(T) increases. The result is compared with predictions of presently available models.
    Trvalý link: http://hdl.handle.net/11104/0242941

     
     
Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.