Details

Autor(en) / Beteiligte

• Acharya, S
• Acosta, F-.T
• Adamová, D
• Adolfsson, J
• Aggarwal, M. M
• Aglieri Rinella, G
• Agnello, M

Titel

Measurement of the inclusive J/[Formula omitted] polarization at forward rapidity in pp collisions at [Formula omitted] TeV

Ist Teil von

• The European physical journal. C, Particles and fields, 2018-07, Vol.78 (7), p.1-16

Ort / Verlag

Heidelberg: Springer

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We report on the measurement of the inclusive J/ [Formula omitted] polarization parameters in pp collisions at a center of mass energy [Formula omitted] 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 [Formula omitted]. J/ [Formula omitted] resonances are reconstructed in their di-muon decay channel in the rapidity interval [Formula omitted] and over the transverse-momentum interval [Formula omitted] [Formula omitted]. The three polarization parameters ( [Formula omitted], [Formula omitted], [Formula omitted]) are measured as a function of [Formula omitted] both in the helicity and Collins-Soper reference frames. The measured J/ [Formula omitted] 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 [Formula omitted] TeV.