Logo image
Measurement of the inclusive J/ ψ polarization at forward rapidity in pp collisions at √s=8 TeV
期刊文章   開放取用(OA)   同儕審查

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

S. Acharya, F.-T. Acosta, D. Adamová, J. Adolfsson, M.M. Aggarwal, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, S.U. Ahn, …
European Physical Journal C, 卷.78(7), 562
07/2018

摘要

Engineering (miscellaneous) Physics and Astronomy (miscellaneous)
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 <sup>- 1</sup> . 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 < p <sub>T</sub> < 15 GeV / c. The three polarization parameters (λ <sub>θ</sub> , λ <sub>φ</sub> , λ <sub>θ</sub> <sub>φ</sub> ) are measured as a function of p <sub>T</sub> both in the helicity and Collins-Soper reference frames. The measured 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.

檔案與連結 (1)

url
https://doi.org/10.1140/epjc/s10052-018-6027-2檢視
已出版(紀錄版本) 開放

相關連結

指標

1 檢視次數

詳細資料

Logo image