Near threshold J/ψ and γ photoproduction at JLab and RHIC

Hatta, Yoshitaka; Rajan, Abha; Yang, Di-Lun

doi:10.1103/PhysRevD.100.014032

Title: Near threshold $J / ψ$ and $γ$ photoproduction at JLab and RHIC

Journal Article · 29 July 2019 · Physical Review D

DOI: https://doi.org/10.1103/PhysRevD.100.014032 · OSTI ID:1545425

Hatta, Yoshitaka ^[1]; Rajan, Abha ^[1]; Yang, Di-Lun ^[2]

Brookhaven National Lab. (BNL), Upton, NY (United States)
Keio Univ., Yokohama (Japan)

We update our previous calculation of J/ψ photo-production near threshold by incorporating the recent developments in theory and the new experimental data from the GlueX collaboration at Jefferson Lab. We then propose to study the near threshold production of Υ and J/ψ in ultraperipheral pA collisions at RHIC. These processes are sensitive to the gluon condensate in the proton which is related to the QCD trace anomaly. Our result emphasizes the role of gluons as the origin of the proton mass.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: SC0012704

OSTI ID:: 1545425

Alternate ID(s):: OSTI ID: 1560009

Report Number(s):: BNL-212016-2019-JAAM; PRVDAQ; TRN: US2000446

Journal Information:: Physical Review D, Vol. 100, Issue 1; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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