Investigating the inclusive transverse spectra in high-energy 
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 collisions in the context of geometric scaling framework

Moriggi, Lucas Soster; Peccini, Guilherme Müller; Machado, M. V. T.

doi:10.1103/physrevd.102.034016

Cited by 21 publications

(12 citation statements)

References 75 publications

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“…Thus, even for QCD, the effective coupling is obtained non-perturbatively as an analytical expression. The self-similarity has been observed in high-energy collisions [42,43,44].…”

Section: Discussionmentioning

confidence: 86%

Gauge fields renormalization groups and thermofractals

Deppman¹,

Megías²,

Menezes³

2022

Preprint

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The perturbative approach to QCD has shown to be limited, and the difficulties to obtain accurate calculations in the low-energy region seems to be insurmountable. A recent approach uses the fractal structures of Yang-Mills Field Theory to circumvent those difficulties, allowing for the determination of an analytic expression for the running coupling. The results obtained are in agreement with several experimental findings, and explain many of the observed phenomena at high-energy collisions. In this work, we address some of the conceptual aspects of the fractal approach, which are expressed in terms of the renormalization group equation and the self-energy corrections to the parton mass. We associate these well-known concepts with the origins of the fractal structure in the quantum field theory.

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“…Thus, even for QCD, the effective coupling is obtained non-perturbatively as an analytical expression. The self-similarity has been observed in high-energy collisions [42,43,44].…”

Section: Discussionmentioning

confidence: 86%

Gauge fields renormalization groups and thermofractals

Deppman¹,

Megías²,

Menezes³

2022

Preprint

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“…A phenomenological model that accounts for the geometric scaling present in charged hadrons production in pp collisions combined with a Tsallis-like distribution observed from the hadron spectrum measured is proposed in Refs. [46,47] (hereafter MPM model). The corresponding gluon UGD is expressed as:…”

Section: Theoretical Formalismmentioning

confidence: 99%

“…In calculations we consider the parameters from Fit B in Ref. [46]. Namely, σ 0 = 20.47 mb, x0 = 3.52 × 10 −5 , a = 0.055 and b = 0.204.…”

Section: Theoretical Formalismmentioning

confidence: 99%

Investigating the QCD dynamical entropy in high-energy hadronic collisions

Ramos,

Machado

2022

Preprint

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The dynamical entropy of dense gluonic states at in proton-proton collisions at high energies is studied by using phenomenological models for the unintegrated gluon distribution. The corresponding transverse momentum probability distributions are evaluated in terms of rapidity. The dynamical entropy density is obtained in the rapidity range relevant for the collisions at the Large Hadron Collider. The total entropy density for the dense system is computed as a function of the rapidity evolution ∆Y = Y − Y0 given a initial rapidity Y0. The theoretical uncertainties are investigated and comparison with related approaches in literature is done.

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“…The unintegrated gluon distribution depends on the transverse momentum k T and longitudinal momentum fraction x. Here, in the numerical calculation, we use the MPM analytical parametrization [59] for the UGD. It is determined from the analysis of available data for light hadron production in pp( p) collisions.…”

Section: Nuclear Effects In the Gluon Distribution In A Nucleusmentioning

confidence: 99%

“…where δn = aτ b , and λ = 0.33 is fixed [62,63]. The parameters σ 0 , x 0 , a, and b have been fitted from DESY-HERA (Deutsches Elektronen-Synchrotron, Hadron-Electron Ring Accelerator) data for proton structure function (see discussion in [59]). For central rapidity, y∼0, the x variable can be expressed as x = p T / √ s. The incorporation of the nuclear effects in the gluon distribution is given by the Glauber-Gribov approach for multiple scattering.…”

Section: Nuclear Effects In the Gluon Distribution In A Nucleusmentioning

confidence: 99%

Nuclear Modification Factor in Small System Collisions within Perturbative QCD including Thermal Effects

Moriggi

Machado

2022

Physics

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In this paper, the nuclear modification factors, RxA, are investigated for pion production in small system collisions, measured by PHENIX experiment at RHIC (Relativistic Heavy Ion Collider). The theoretical framework is the parton transverse momentum kT-factorization formalism for hard processes at small momentum fraction, x. Evidence for collective expansion and thermal effects for pions, produced at equilibrium, is studied based on phenomenological parametrization of blast-wave type in the relaxation time approximation. The dependencies on the centrality and on the projectile species are discussed in terms of the behavior of Cronin peak and the suppression of RxA at large transverse momentum, pT. The multiplicity of produced particles, which is sensitive to the soft sector of the spectra, is also included in the present analysis.

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Investigating the inclusive transverse spectra in high-energy pp collisions in the context of geometric scaling framework

Cited by 21 publications

References 75 publications

Gauge fields renormalization groups and thermofractals

Gauge fields renormalization groups and thermofractals

Investigating the QCD dynamical entropy in high-energy hadronic collisions

Nuclear Modification Factor in Small System Collisions within Perturbative QCD including Thermal Effects

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