Physical limits in the color-dipole model bounds

Boroun, G. R.

doi:10.1140/epja/s10050-021-00517-5

Cited by 4 publications

(2 citation statements)

References 94 publications

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“…and the effective parameters are defined in Table 1. Note that the results of using the parametrization method can be found recently in [45][46][47]. In this picture, the known expression for α s (Q 2 )xg(x, Q 2 ) (with respect to Eqs.…”

Section: Qcdmentioning

confidence: 96%

One-to-One Correspondence of Soft and Hard Pomeron with the Color Dipole Picture of the Gluon Density at Low x

Boroun

2023

Jetp Lett.

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The correspondence between the gluon density behavior of the color dipole picture (CDP) and the two- Pomeron approach at low x deep inelastic scattering is considered. For photon virtualities of Q2$$ \gtrsim $$10 GeV2, the results for the parametrization and CDP models are defined by the CDP asymptotic limit and are compatible with the soft and hard-Pomeron approach. These results show that the hard-Pomeron trajectory does not guarantee converging towards the asymptotic representation at low and large Q2 (Q2$$ \lesssim $$ 100 GeV2) values in a wide range of the virtual-photon-proton energy squared. The gluon distributions can be obtained directly in terms of the proton structure functions and the running coupling and compared with the results from the M. Gluck, P. Jimenez-Delgado and E. Reya (GJR) and A. Martin, W. Stirling, R. Thorne, and G. Watt (MSTW) parametrizations.

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Section: Qcdmentioning

confidence: 96%

One-to-One Correspondence of Soft and Hard Pomeron with the Color Dipole Picture of the Gluon Density at Low x

Boroun

2023

Jetp Lett.

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“…2) A comparison of LLM predictions on F L (x, Q 2 ) with other models can be found [46]. So, we ended up with the following form (nonfactorized with respect to x and k 2 T ) of the initial LLM gluon density in a proton:…”

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confidence: 99%

Refined TMD Gluon Density in a Proton from the HERA and LHC Data

Lipatov,

Lykasov,

Malyshev

2024

Jetp Lett.

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We update the phenomenological parameters of the Transverse Momentum Dependent (TMD, or unintegrated) gluon density in a proton proposed in our previous studies. This analysis is based on the analytical expression for starting gluon distribution which provides a self-consistent simultaneous description of HERA data on proton structure function F2(x, Q2), reduced cross section for the electron-proton deep inelastic scattering at low Q2 and soft hadron production in pp collisions at the LHC conditions. We extend it to the whole kinematical region using the Catani–Ciafaloni–Fiorani–Marchesini (CCFM) evolution equation. Exploiting our previous results on a number of semihard QCD processes, we performed a combined fit to an extended set of LHC and HERA data, comprising a total of 509 points from 16 data sets. We illustrate our fit by applying the derived TMD gluon density in a proton to inclusive prompt photon photoproduction at HERA.

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Heavy quark structure functions from unifying the color dipole picture and double asymptotic scaling approaches

Boroun

2024

Phys. Rev. D

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We present an analysis of the heavy quark structure functions from the kt factorization scheme, using unifying the color dipole picture and double asymptotic scaling approaches at small x. The gluon distribution is obtained from the Golec-Biernat-Wüsthoff and Bartels, Golec-Biernat and Kowalski models. The main elements are based on the color dipole picture and the generalized double asymptotic scaling approach for usual parton distribution functions. The comparisons with the HERA data are made and predictions for the proposed LHeC and FCC-he colliders are also provided in a wide range of the transverse separation r. In particular, the ratio Rh=FLh/F2h,h=c,b,t is well described by the dipole models and is sensitive to the collider energies from HERA until FCC-he. We derive correlated bounds on the ratio F2c/F2 and F2b/F2 and compared them with the BGK and impact-parameter dependent saturation models. The uncertainties are due to the renormalization and factorization scales at large and low r values. The Sudakov form factor into the heavy quark structure functions is incorporated and the results are considered, which are dependent on the hard scale in a wide range of the transverse separation r. Published by the American Physical Society 2024

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Physical limits in the color-dipole model bounds

Cited by 4 publications

References 94 publications

One-to-One Correspondence of Soft and Hard Pomeron with the Color Dipole Picture of the Gluon Density at Low x

One-to-One Correspondence of Soft and Hard Pomeron with the Color Dipole Picture of the Gluon Density at Low x

Refined TMD Gluon Density in a Proton from the HERA and LHC Data

Heavy quark structure functions from unifying the color dipole picture and double asymptotic scaling approaches

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