Measurement of the inclusive J/ψ polarization at forward rapidity in pp collisions at s√=8 TeV
(2018) In European Physical Journal C 78(7).- 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 parameters (λθ, λφ, λθφ) are measured as a function of pT 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... (More)
- 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 parameters (λθ, λφ, λθφ) are measured as a function of pT 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. (Less)
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- author
- author collaboration
- organization
- publishing date
- 2018
- type
- Contribution to journal
- publication status
- published
- subject
- in
- European Physical Journal C
- volume
- 78
- issue
- 7
- article number
- 562
- publisher
- Springer
- external identifiers
-
- scopus:85049776261
- ISSN
- 1434-6044
- DOI
- 10.1140/epjc/s10052-018-6027-2
- language
- English
- LU publication?
- yes
- additional info
- The authors listed here are only a few of all authors. For information about all authors of the publication, please see the original publication.
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- d8866988-6e71-4278-8198-525c65405b40
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- 2018-08-14 13:53:18
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- 2023-07-25 13:38:34
@article{d8866988-6e71-4278-8198-525c65405b40, 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 parameters (λθ, λφ, λθφ) are measured as a function of pT 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.}}, author = {{Acharya, S and Acosta, F. T. and Adamova, D. and Adolfsson, Jonatan and Aggarwal, M. M. and Ahammed, Z. and Ahn, S. U. and Christiansen, Peter and Ljunggren, Martin and Nassirpour, Adrian and Oskarsson, Anders and Richert, Tuva and Silvermyr, David and Stenlund, Evert and Vislavicius, Vytautas and Zou, S.}}, issn = {{1434-6044}}, language = {{eng}}, number = {{7}}, publisher = {{Springer}}, series = {{European Physical Journal C}}, title = {{Measurement of the inclusive J/ψ polarization at forward rapidity in pp collisions at s√=8 TeV}}, url = {{http://dx.doi.org/10.1140/epjc/s10052-018-6027-2}}, doi = {{10.1140/epjc/s10052-018-6027-2}}, volume = {{78}}, year = {{2018}}, }