BFKL scattering at LEPII and a next e+e− collider

Brodsky, Stanley J.; Hautmann, F.; Soper, D.E.

doi:10.1063/1.53626

Cited by 4 publications

(6 citation statements)

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“…The adoption of some scale-optimization methods, such as the Brodsky-Lepage-Mackenzie (BLM) prescription [193,[259][260][261] in its semi-hard designed version [212] allowed us to partially dampen these instabilities on azimuthal correlations. Unfortunately, it turned out to be ineffective on cross sections, since the found optimal scales were much larger than the natural ones afforded by kinematics [226],…”

Section: Studies On the Bfkl Ugd Historically Beganmentioning

confidence: 99%

High-energy emissions of light mesons plus heavy flavor at the LHC and the Forward Physics Facility

Celiberto

2022

Preprint

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The study of the dynamics of strong interactions in the high-energy regime is a core line of frontier researches at the LHC as well as at new-generation colliding facilities. Here, the enhancement of energy logarithms due to diffractive semi-hard final states spoils the convergence of the perturbative series in the QCD running coupling, thus calling for an improvement of the pure collinear factorization that accounts for an all-order resummation of these large logarithmic contributions. Motivated by the recent discovery that inclusive emissions of heavy-flavored particles allow for clear signals of a stabilization of high-energy resummed differential distributions under higher-order corrections and scale variations, we provide novel predictions of rapidity and azimuthal-angle observables for the inclusive hadroproduction of a light meson (η or π ± ) in association with a heavy-flavored hadron (Λ c or b-flavored hadron). We calculate our observables in a hybrid high-energy and collinear factorization framework, where next-to-leading BFKL-resummed partonic cross sections are convoluted with collinear parton distributions and fragmentation functions. We consider kinematic ranges typically covered by acceptances of LHC detectors, and new ones coming from the combined tag of an ultra-forward particle at the future Forward Physics Facility (FPF) and of a central one at ATLAS via a tight timing-coincidence setup. By performing a detailed study on uncertainties associated to collinear inputs via a replica-driven analysis, as well as on ones intrinsically coming from the high-energy resummation, we highlight the challenges and the steps required to gauge the feasibility of precision studies of our processes.

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Section: Studies On the Bfkl Ugd Historically Beganmentioning

confidence: 99%

High-energy emissions of light mesons plus heavy flavor at the LHC and the Forward Physics Facility

Celiberto

2022

Preprint

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“…[89]. It relies on the so-called Brodsky-Lepage-Mackenzie (BLM) method [140][141][142][143], which prescribes that the optimal scale value is the one that cancels the non-conformal β 0 -terms in the considered observable. Although the application of the BLM method led to a significant improvement of the agreement between predictions for azimuthal correlations of the two Mueller-Navelet jets and CMS data [144], the scale values found, much higher than the natural ones, generally bring to a substantial reduction of cross sections (observed for the first time in inclusive light charged dihadron emissions [96,98]).…”

Section: Productionmentioning

confidence: 99%

Bottom-flavored inclusive emissions in the variable-flavor number scheme: A high-energy analysis

Celiberto,

Fucilla,

Ivanov

et al. 2021

Preprint

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We propose the inclusive semi-hard production, in proton-proton collisions, of two bottomflavored hadrons, as well as of a single bottom-flavored hadron accompanied by a light jet, as novel channels for the manifestation of stabilization effects of the high-energy resummation under next-to-leading-order corrections. Our formalism relies on a hybrid high-energy and collinear factorization, where the BFKL resummation of leading and next-to-leading energy logarithms is used together with collinear factorization. We present results for cross sections and azimuthal correlations differential in rapidity, which are widely recognized as standard observables where to hunt for distinctive signals of the BFKL dynamics. We propose the study of double differential distributions in the transverse momenta of final-state particles as a common basis to investigate the interplay of different kinds of resummation mechanisms.

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“…However, one can also use Eqs. (5) and (8) to explore small x deeply inelastic scattering [14], in which Q 2 B ø Q 2 A ø s. We will investigate these issues in a future paper [15].…”

mentioning

confidence: 99%

“…However, one can also use Eqs. ( 5) and ( 8) to explore small x deeply inelastic scattering (DIS) [14], in which Q 2 B ≪ Q 2 A ≪ s. We will investigate these issues in a future paper [15]. The cross section for high energy virtual photon scattering can be measured in e ± e − collisions in which the outgoing leptons are tagged.…”

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confidence: 99%

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Probing the QCD Pomeron ine+e−Collisions

1997

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BFKL scattering at LEPII and a next e+e− collider

Abstract: We discuss virtual photon scattering in the region dominated by BFKL exchange, and report results for the cross sections at present and future e + e − colliders.

Cited by 4 publications

References 4 publications

High-energy emissions of light mesons plus heavy flavor at the LHC and the Forward Physics Facility

High-energy emissions of light mesons plus heavy flavor at the LHC and the Forward Physics Facility

Bottom-flavored inclusive emissions in the variable-flavor number scheme: A high-energy analysis

Probing the QCD Pomeron ine+e−Collisions

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