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Measurement of the inclusive J/$$\psi $$ψ polarization at forward rapidity in pp collisions at $$\mathbf \sqrts = 8$$s=8 TeV

Acharya, S.
•
Acosta, F-. T.
•
Adamová, D.
altro
Zou, S.
2018
  • journal article

Periodico
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
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 param- eters (λθ , λφ , λθ φ ) are measured as a function of pT both in the helicity and Collins-Soper reference frames. The mea- sured 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.
DOI
10.1140/epjc/s10052-018-6027-2
WOS
WOS:000438114500002
Archivio
http://hdl.handle.net/11368/2927694
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85049776261
https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-6027-2
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/2927694/1/EPJC_78(2018)562_1-16.pdf
Soggetti
  • ALICE

  • LHC

Scopus© citazioni
18
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
18
Data di acquisizione
Mar 19, 2024
Visualizzazioni
1
Data di acquisizione
Apr 19, 2024
Vedi dettagli
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