A1 Journal article (refereed)
Polarization and cross section of midrapidity J/ψ production in p+p collisions at √s = 510 GeV (2020)

PHENIX Collaboration. (2020). Polarization and cross section of midrapidity J/ψ production in p+p collisions at √s = 510 GeV. Physical Review D, 102(7), Article 072008. https://doi.org/10.1103/PhysRevD.102.072008

JYU authors or editors

Publication details

All authors or editors: PHENIX Collaboration

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2020

Publication date: 28/10/2020

Volume: 102

Issue number: 7

Article number: 072008

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.102.072008

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/72553

Publication is parallel published: https://arxiv.org/abs/2005.14273

Additional information: Lähde: Google Scholar. 091120 HV
091120 MR

Abstract

The PHENIX experiment has measured the spin alignment for inclusive J/ψ→e+e− decays in proton-proton collisions at √s=510  GeV at midrapidity. The angular distributions have been measured in three different polarization frames, and the three decay angular coefficients have been extracted in a full two-dimensional analysis. Previously, PHENIX saw large longitudinal net polarization at forward rapidity at the same collision energy. This analysis at midrapidity, complementary to the previous PHENIX results, sees no sizable polarization in the measured transverse momentum range of 0.0<10.0  GeV/c. The results are consistent with a previous one-dimensional analysis at midrapidity at √s=200  GeV. The transverse-momentum-dependent cross section for midrapidity J/ψ production has additionally been measured, and after comparison to world data, a simple logarithmic dependence of the cross section on √s was found.

Keywords: particle physics

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2