Inelastic heavy quark and quarkonium ultra-incoherent photoproduction in ultra-peripheral collisions

Zhu, J.; Ma, Zhi-Lei; Shi, Chao-Yi; Li, Yun-De

doi:10.1103/physrevc.92.054907

Cited by 10 publications

(22 citation statements)

References 56 publications

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“…[8], Drees and Zeppenfeld provided a approximate analytic form of Eq. ( 22) which is widely used in the literatures [12][13][14][15][16][17]. By taking Q 2 max → ∞ and setting…”

Section: The Equivalent Photon Spectrummentioning

confidence: 99%

“…Actually, another approximate form of above equation is often used in practical calculations [12][13][14][15][16][17][18], which neglect G 2 E (Q 2 ) term of Eq. ( 26) and take…”

Section: The Equivalent Photon Spectrummentioning

confidence: 99%

“…Details of its off mass-shell behavior are not essential. Subsequently, WWA as a useful technique was substantiated and successfully applied, for instance, to two-photon processes for particle production, photoproduction mechanism, meson production in electron-nucleon collisions, the determination of the nuclear parton distributions, and smallx physics [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. On the other hand, WWA has found application beyond the realms of QED, such as the equivalent pion method which describes the subthreshold pion production in nucleus-nucleus collision [25]; the nuclear Weizsäcker-Williams method which describes excitation processes induced by the nuclear interaction in peripheral collisions of heavy ions [26]; a non-Abelian Weizsäcker-Williams method describing the boosted gluon distribution functions in nucleus-nucleus collision [27].…”

Section: Introductionmentioning

confidence: 99%

“…Although the tremendous successes have been achieved, the discussion about the accuracy of WWA and its applicability range is still insufficient. A number of widely used equivalent photon fluxes are proposed beyond the WWA validity range, and some imprecise statements are given [7][8][9][10][11][12][13][14][15][16][17]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

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Validity of equivalent photon spectra and the photoproduction processes in p-p collisions

Ma,

Lu,

Zhang

2021

Preprint

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Through a consistent analysis of the terms neglected in going from the accurate expression to the one of Weizsäcker-Williams approximation (WWA), the validity of equivalent photon spectra is studied, and a modified photon flux of proton is also derived. We take the photoproductions of photons and dileptons as examples, to provide the comparison between the exact results and the ones based on various photon fluxes. We present the results for the distributions in Q 2 (virtuality of photons), y and p T , the total cross sections are also estimated. The numerical results show that the modified equivalent photon spectrum reproduces the exact result within less than one percent. And the corrections of photoproduction processes to the dileptons and photons productions are about 20%.

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“…[8], Drees and Zeppenfeld provided a approximate analytic form of Eq. ( 22) which is widely used in the literatures [12][13][14][15][16][17]. By taking Q 2 max → ∞ and setting…”

Section: The Equivalent Photon Spectrummentioning

confidence: 99%

“…Actually, another approximate form of above equation is often used in practical calculations [12][13][14][15][16][17][18], which neglect G 2 E (Q 2 ) term of Eq. ( 26) and take…”

Section: The Equivalent Photon Spectrummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Validity of equivalent photon spectra and the photoproduction processes in p-p collisions

Ma,

Lu,

Zhang

2021

Preprint

Self Cite

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show abstract

“…Since its convenience and simplicity, EPA has been widely applied in the calculations of various processes in relativistic heavy ion collisions, for instance, the photoproduction processes, twophoton particle production, particle and particle pairs production, meson production in electron-nucleon collisions. [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]. In addition, EPA has been adopted in the determination of the nuclear parton distributions, and the study of small-x physics.…”

Section: Introductionmentioning

confidence: 99%

Photoproductions of dileptons, photons, and light vector mesons in p-p, p-Pb, and Pb-Pb collisions at Large Hadron Collider energies

Ma,

Lu,

Zhu

et al. 2019

Preprint

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The production of large pT dilepton, photon and light vector mesons originating from photoproduction processes in p-p, p-Pb and Pb-Pb collisions at Large Hadron Collider energies are studied. An exact treatment beyond the equivalent photon approximation approach is developed for the calculations of these processes. The method developed by Martin and Ryskin is used for avoiding double counting and can be also extended to deal with heavy ion collision. The Q 2 (the virtuality of the photon), pT and yr (rapidity) dependent differential cross sections are predicted. The numerical results indicate that, the equivalent photon approximation is sensitive to the values of kinematical variables and is only applicable in the small Q 2 region, i.e., it can be used for coherent and ordinaryincoherent photoproduction processes with proper choice of Q 2 max (the choices Q 2 max ∼ ŝ or ∞ will cause obvious problem), but can not be used for incoherent and ultra-incoherent photoproduction processes. Thus, the exact treatment is needed in order to accurately deal with the photoproduction of large pT dilepton, photon and light vector mesons.

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Validity of equivalent photon spectra and the photoproduction processes in p-p collisions

Lü

Zhang

2022

Nuclear Physics B

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Inelastic heavy quark and quarkonium ultra-incoherent photoproduction in ultra-peripheral collisions

Cited by 10 publications

References 56 publications

Validity of equivalent photon spectra and the photoproduction processes in p-p collisions

Validity of equivalent photon spectra and the photoproduction processes in p-p collisions

Photoproductions of dileptons, photons, and light vector mesons in p-p, p-Pb, and Pb-Pb collisions at Large Hadron Collider energies

Validity of equivalent photon spectra and the photoproduction processes in p-p collisions

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