Deep Inelastic Scattering in the Dipole Picture at Next-to-Leading Order

Hänninen, H.

doi:10.48550/arxiv.2112.08818

Cited by 4 publications

(4 citation statements)

References 157 publications

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“…These resummations are known to approximate the full NLO BK equation well as shown in refs. [59,108]. The initial conditions for these evolutions are determined in ref.…”

Section: Jhep08(2022)247mentioning

confidence: 99%

Complete calculation of exclusive heavy vector meson production at next-to-leading order in the dipole picture

Mäntysaari

Penttala

2022

J. High Energ. Phys.

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Exclusive production of transversely polarized heavy vector mesons in deep inelastic scattering at high energy is calculated at next-to-leading order accuracy in the Color Glass Condensate framework. In addition to the first QCD correction proportional to the strong coupling constant αs, we systematically also include the first relativistic correction proportional to the heavy quark velocity squared v2. When combined with our previously published results for longitudinal vector meson production at next-to-leading order accuracy, these results make phenomenological calculations of heavy vector meson production possible at the order $$ \mathcal{O} $$ O (αsv0,$$ {\alpha}_{\mathrm{s}}^0 $$ α s 0 v2). When applied to J/ψ and Υ production at HERA and at the LHC, a good agreement between the next-to-leading order calculations and experimental data is found. Additionally, we demonstrate that vector meson production can provide additional constraints compared to structure function analyses when the nonperturbative initial condition for the Balitsky-Kovchegov evolution equation is extracted.

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“…These resummations are known to approximate the full NLO BK equation well as shown in refs. [59,108]. The initial conditions for these evolutions are determined in ref.…”

Section: Jhep08(2022)247mentioning

confidence: 99%

Complete calculation of exclusive heavy vector meson production at next-to-leading order in the dipole picture

Mäntysaari

Penttala

2022

J. High Energ. Phys.

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“…In Ref. [1] (see also [4]), we calculated the full contribution of the diagrams shown in Fig. 1 to the diffractive structure function.…”

Section: Contribution Of the Q Qg Fock Statementioning

confidence: 99%

Diffractive structure function in the dipole picture

Beuf¹,

Hänninen²,

Lappi³

et al. 2023

Preprint

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We calculate the contribution from the q qg component of a virtual photon state to the small-x diffractive cross section in deep inelastic scattering in the saturation regime. The obtained cross section is finite by itself and a part of the full next-to-leading order result. We perform the calculation in exact kinematics in the eikonal limit, and show that the previously known high virtuality Q 2 and large invariant mass M 2 X results for the structure functions can be extracted. We furthermore discuss the steps required to obtain the full next-to-leading order result.

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“…A usual and numerically convenient approach, however, is to include resummations of the most important higher-order corrections to the leading-order BK equation. The leading-order BK equation with such resummations can be used to accurately approximate the full NLO BK equation [27,63]. Several resummation schemes exist, and in this work the following equations are used (we adopt the terminology used in Ref.…”

Section: B Twist Expansionmentioning

confidence: 99%

Exclusive production of light vector mesons at next-to-leading order in the dipole picture

Mäntysaari,

Penttala

2022

Preprint

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Exclusive production of light vector mesons in deep inelastic scattering is calculated at next-toleading order in the dipole picture in the limit of high photon virtuality. The resulting expression is free of any divergences and suitable for numerical evaluations. The higher-order corrections are found to be numerically important, but they can be mostly captured by the nonperturbative fit parameters describing the initial condition for the small-x evolution of the dipole scattering amplitude. The vector meson production cross section is shown to depend only weakly on the meson distribution amplitude and the factorization scale. We also present phenomenological comparisons of our result to the existing exclusive φ and ρ production data from HERA and find an excellent agreement at high virtualities.

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Deep Inelastic Scattering in the Dipole Picture at Next-to-Leading Order

Cited by 4 publications

References 157 publications

Complete calculation of exclusive heavy vector meson production at next-to-leading order in the dipole picture

Complete calculation of exclusive heavy vector meson production at next-to-leading order in the dipole picture

Diffractive structure function in the dipole picture

Exclusive production of light vector mesons at next-to-leading order in the dipole picture

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