The color evaporation model in diffractive J/ψ photoproduction

Mariotto, C. Brenner

doi:10.1016/s0370-2693(99)00983-1

Cited by 23 publications

(18 citation statements)

References 27 publications

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“…In order to get an estimate of the theoretical uncertainty associated to the choice of the model used to describe the quarkonium production, in Fig. 2 we also present the predictions obtained using the Color Evaporation Model (CEM), which was proposed many years ago [44], extensively used in the literature [45,46] and recently improved [47].…”

Section: Resultsmentioning

confidence: 99%

Diffractive quarkonium photoproduction in pp and pA collisions at the LHC: Predictions of the resolved Pomeron model for the Run 2 energies

2017

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The inclusive diffractive quarkonium photoproduction in pp and pA collisions is investigated considering the Resolved Pomeron Model to describe the diffractive interaction. We estimate the rapidity and transverse momentum distributions for the J/Ψ, Ψ(2S) and Υ photoproduction in hadronic collisions at the LHC and present our estimate for the total cross sections at the Run 2 energies. A comparison with the predictions associated to the exclusive production also is presented. Our results indicate that the inclusive diffractive production is a factor 10 smaller than the exclusive one in the kinematical range probed by the LHC.

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Section: Resultsmentioning

confidence: 99%

Diffractive quarkonium photoproduction in pp and pA collisions at the LHC: Predictions of the resolved Pomeron model for the Run 2 energies

2017

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“…Asymmetry in J/ψ production We consider the LO parton model cross section for low virtuality electroproduction (photoproduction) of J/ψ within the color evaporation model. According to CEM, the cross section for charmonium production is proportional to the rate of production of the cc pair integrated over the mass range 2m c to 2m D [19] …”

Section: Formalismmentioning

confidence: 99%

“…[11] we had performed a phenomenological study of the SSA in charmonium production. We had calculated the asymmetry in the process e+p ↑ → e+J/ψ+X using the color evaporation model of charmonium production [19]. As discussed therein, in this exploratory study of SSA as a probe of the gluon Sivers function, we had chosen to work with CEM due to its simplicity.…”

Section: Introductionmentioning

confidence: 99%

Transverse single spin asymmetry ine+p↑→e+J/ψ+Xand transverse momentum dependent evolution of the Sivers function

et al. 2013

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We extend our analysis of transverse single spin asymmetry (SSA) in electroproduction of J/ψ to include the effect of the scale evolution of the transverse momentum dependent (TMD) parton distribution functions and gluon Sivers function. We estimate SSA for JLab, HERMES, COMPASS, and eRHIC energies using the color evaporation model of charmonium production, using an analytically obtained approximate solution of TMD evolution equations discussed in the literature. We find that there is a reduction in the asymmetry compared with our predictions for the earlier case considered by us, wherein the Q 2 dependence came only from DGLAP evolution of the unpolarized gluon densities and a different parametrization of the TMD Sivers function was used.

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“…It gives a good phenomenological description of several production processes up to the present energy domain [11,12,4,13]. CEM also provides an alternative to Pomeron-based models for the description of photoproduction of J/ψ, D and Υ at HERA [14].…”

Section: The Colour Evaporation Modelmentioning

confidence: 99%

Soft and hard QCD dynamics in hadroproduction of charmonium

Mariotto

Ingelman

2002

Eur. Phys. J. C

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Both hard and soft QCD dynamics are important in charmonium production, as presented here through a next-to-leading order QCD matrix element calculation combined with the colour evaporation model. Observed x F and p ⊥ distributions of J/ψ in hadroproduction at fixed target and pp collider energies are reproduced. Quite similar results can also be obtained in a more phenomenologically useful Monte Carlo event generator where the perturbative production of cc pairs is instead obtained through leading order matrix elements and the parton shower approximation of the higher order processes. The soft dynamics may alternatively be described by the soft colour interaction model, originally introduced in connection with rapidity gaps. We also discuss the relative rates of different charmonium states and introduce an improved model for mapping the continuous cc mass spectrum on the physical charmonium resonances.

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The color evaporation model in diffractive J/ψ photoproduction

Cited by 23 publications

References 27 publications

Diffractive quarkonium photoproduction in pp and pA collisions at the LHC: Predictions of the resolved Pomeron model for the Run 2 energies

Diffractive quarkonium photoproduction in pp and pA collisions at the LHC: Predictions of the resolved Pomeron model for the Run 2 energies

Transverse single spin asymmetry ine+p↑→e+J/ψ+Xand transverse momentum dependent evolution of the Sivers function

Soft and hard QCD dynamics in hadroproduction of charmonium

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