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Remaining parts of the long-standing J/ψ polarization puzzle
- Source :
- Physical Review
- Publication Year :
- 2019
- Publisher :
- American Physical Society (APS), 2019.
-
Abstract
- Based on the nonrelativistic quantum chromodynamics factorization formalism, the polarization parameters λθϕ and λϕ of prompt J/ψ hadroproduction for CMS and LHCb are analyzed in the helicity frame and calculated at QCD next-to-leading order for the first time. For prompt J/ψ production, we take into account the feed-down contributions from χcJ and ψ(2S) decays. The theoretical predictions for the polarization parameters λθϕ and λϕ of J/ψ are presented. Using the theoretical results, we perform a simultaneous fit to the experimental measurements of the yield and polarization of J/ψ hadroproduction, and find that the results describe the experimental measurements at the LHC quite well.
Details
- ISSN :
- 24700029 and 24700010
- Volume :
- 99
- Database :
- OpenAIRE
- Journal :
- Physical Review D
- Accession number :
- edsair.doi.dedup.....1e2c43ab883347388f56b4cdd40cb6f8
- Full Text :
- https://doi.org/10.1103/physrevd.99.014044