Počet záznamů: 1
Measurement of the inclusive J/psi polarization at forward rapidity in pp collisions at root s=8 TeV
- 1.0492085 - ÚJF 2019 RIV US eng J - Článek v odborném periodiku
Acharya, S. - Acosta, F. T. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Broz, M. - Contreras, J. G. - Horák, D. - Křížek, Filip - Kučera, Vít - Kushpil, Svetlana - Lavička, R. - Mareš, Jiří A. - Petráček, V. - Šumbera, Michal - Závada, Petr … celkem 1012 autorů
Measurement of the inclusive J/psi polarization at forward rapidity in pp collisions at root s=8 TeV.
European Physical Journal C. Roč. 78, č. 7 (2018), č. článku 562. ISSN 1434-6044. E-ISSN 1434-6052
Grant CEP: GA MŠMT(CZ) LTT17018
Institucionální podpora: RVO:68378271 ; RVO:61389005
Klíčová slova: ALICE * heavy ion collisions * quarkonium production
Obor OECD: Nuclear physics; Particles and field physics (FZU-D)
Impakt faktor: 4.843, rok: 2018
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.
Trvalý link: http://hdl.handle.net/11104/0285648
Počet záznamů: 1