Leptoproduction of $\rho $ Mesons as Discriminator for the Unintegrated Gluon Distribution in the Proton

Bolognino, Andrèe Dafne; Celiberto, Francesco Giovanni; Ivanov, D. Yu.; Papa, Alessandro

doi:10.5506/aphyspolbsupp.12.891

Cited by 52 publications

(36 citation statements)

References 16 publications

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“…Moreover, the convolution of one impact factor with the unintegrated gluon distribution (UGD) in the proton gives access to single-forward processes, such as the exclusive light vector-meson electroproduction [76][77][78][79][80][81][82][83], the exclusive quarkonium photoproduction [84][85][86] and the inclusive tag of Drell-Yan pairs in forward directions [87][88][89][90]. Starting from high-energy ingredients encoded in the UGD, first determinations of small-x enhanced collinear PDFs [91][92][93] as well as T -even gluon transverse-momentum-dependent distributions (TMDs) [94,95] were recently proposed.…”

Section: Hors D'oeuvrementioning

confidence: 99%

High-energy resummation in $$\Lambda _c$$ baryon production

et al. 2021

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We present a study on inclusive emissions of a double $$\Lambda _c$$ Λ c or of a $$\Lambda _c$$ Λ c plus a light-flavored jet system as probe channels in the semi-hard regime of QCD. Our formalism relies on the so-called hybrid high-energy/collinear factorization, where the standard collinear description is supplemented by the t-channel resummation à la BFKL of energy logarithms up to the next-to-leading accuracy. We make use of the modular interface, suited to the analysis of different semi-hard reactions, employing the novel parameterization for the description of parton fragmentation into $$\Lambda _c$$ Λ c baryons. We provide predictions for rapidity distributions and azimuthal correlations, that can be studied at current and forthcoming LHC configurations, hunting for possible stabilizing effects of the high-energy series.

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Section: Hors D'oeuvrementioning

confidence: 99%

High-energy resummation in $$\Lambda _c$$ baryon production

et al. 2021

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“…On the other hand, in Refs. [150][151][152][153] it was highlighted how comparisons with HERA data on helicity-dependent observables for the forward polarized ρ-meson electroproduction permit to constrain the κ-shape of the UGD (pioneering studies on the diffractive production of ρ mesons in the high-energy factorization can be found in Refs. [154][155][156][157]).…”

Section: Introductory Remarksmentioning

confidence: 99%

Hunting BFKL in semi-hard reactions at the LHC

Celiberto

2021

Eur. Phys. J. C

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The agreement between calculations inspired by the resummation of energy logarithms, known as BFKL approach, and experimental data in the semi-hard sector of QCD has become manifest after a wealthy series of phenomenological analyses. However, the contingency that the same data could be concurrently portrayed at the hand of fixed-order, DGLAP-based calculations, has been pointed out recently, but not yet punctually addressed. Taking advantage of the richness of configurations gained by combining the acceptances of CMS and CASTOR detectors, we give results in the full next-to-leading logarithmic approximation of cross sections, azimuthal correlations and azimuthal distributions for three distinct semi-hard processes, each of them featuring a peculiar final-state exclusiveness. Then, making use of disjoint intervals for the transverse momenta of the emitted objects, i.e. $$\kappa $$ κ -windows, we clearly highlight how high-energy resummed and fixed-order driven predictions for semi-hard sensitive observables can be decisively discriminated in the kinematic ranges typical of current and forthcoming analyses at the LHC. The scale-optimization issue is also introduced and explored, while the uncertainty coming from the use of different PDF and FF set is deservedly handled. Finally, a brief overview of , a numerical tool recently developed, suited for the computation of inclusive semi-hard reactions is provided.

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“…More in particular, the emission of a single forward particle in lepton-proton or proton-proton scatterings offers us the chance to define an unintegrated gluon distribution (UGD) in the proton, written as a suitable convolution of the BFKL gluon Green's function and of a non-perturbative proton impact factor. Formerly used for the investigation of DIS structure functions [80], the UGD has later been studied via the exclusive diffractive electroproduction of a single light vector meson [81][82][83][84][85][86] at HERA and via the forward inclusive Drell-Yan production [87][88][89] at LHCb. Then, determinations of collinear parton distribution functions (PDFs) at NLO and next-to-NLO (NNLO) fixed-order calculations, improved via the inclusion of NLA small-x effects, were proposed in the last years [90][91][92].…”

Section: Introductionmentioning

confidence: 99%

High-energy resummed distributions for the inclusive Higgs-plus-jet production at the LHC

et al. 2021

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The inclusive hadroproduction of a Higgs boson and of a jet, featuring large transverse momenta and well separated in rapidity, is proposed as a novel probe channel for the manifestation of the Balitsky–Fadin–Kuraev–Lipatov (BFKL) dynamics. Using the standard BFKL approach, with partial inclusion of next-to-leading order effects, predictions are presented for azimuthal Higgs-jet correlations and other observables, to be possibly compared with experimental analyses at the LHC and with theoretical predictions obtained in different schemes.

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Leptoproduction of $\rho $ Mesons as Discriminator for the Unintegrated Gluon Distribution in the Proton

Cited by 52 publications

References 16 publications

High-energy resummation in $$\Lambda _c$$ baryon production

High-energy resummation in $$\Lambda _c$$ baryon production

Hunting BFKL in semi-hard reactions at the LHC

High-energy resummed distributions for the inclusive Higgs-plus-jet production at the LHC

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