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Sivers effect in inelastic J/ψ photoproduction in ep↑ collision in color octet model
- Source :
- Physical Review D. 98
- Publication Year :
- 2018
- Publisher :
- American Physical Society (APS), 2018.
-
Abstract
- The prediction of single-spin asymmetry in inelastic photoproduction of $J/\ensuremath{\psi}$ in $e{p}^{\ensuremath{\uparrow}}$ collision is presented. At next-to-leading order, the dominating process is photon-gluon fusion, $\ensuremath{\gamma}+g\ensuremath{\rightarrow}J/\ensuremath{\psi}+g$ for the production of $J/\ensuremath{\psi}$ in $e+{p}^{\ensuremath{\uparrow}}\ensuremath{\rightarrow}J/\ensuremath{\psi}+X$, which directly probes the gluon Sivers function. Using the nonrelativistic QCD based color octet model, the color octet states ${^{3}S}_{1}^{(8)}$, ${^{1}S}_{0}^{(8)}$ and ${^{3}P}_{J(0,1,2)}^{(8)}$ contribution to $J/\ensuremath{\psi}$ production is calculated. Sizable asymmetry is estimated as a function of transverse momentum ${P}_{T}$ and energy fraction $z$ of $J/\ensuremath{\psi}$ in the range $0l{P}_{T}\ensuremath{\le}1\text{ }\text{ }\mathrm{GeV}$ and $0.3lz\ensuremath{\le}0.9$. The unpolarized differential cross section of inelastic $J/\ensuremath{\psi}$ photoproduction is found to be in good agreement with H1 and ZEUS data.
- Subjects :
- Physics
Scattering cross-section
Quantum chromodynamics
Particle physics
Energy Fraction
Octet
010308 nuclear & particles physics
High Energy Physics::Phenomenology
Order (ring theory)
01 natural sciences
Gluon
0103 physical sciences
Transverse momentum
High Energy Physics::Experiment
Production (computer science)
010306 general physics
Subjects
Details
- ISSN :
- 24700029 and 24700010
- Volume :
- 98
- Database :
- OpenAIRE
- Journal :
- Physical Review D
- Accession number :
- edsair.doi...........2aa5ada2d2bece303fe3b306bea2e55c
- Full Text :
- https://doi.org/10.1103/physrevd.98.014007