Determination of 
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 meson fragmentation functions through two different approaches

Salajegheh, Maral; Nejad, S. Mohammad Moosavi; Delpasand, Mahdi

doi:10.1103/physrevd.100.114031

Cited by 19 publications

(8 citation statements)

References 65 publications

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“…For our data analysis, we adopted the same functional form for the parameterization of charm and bottom FFs with three free parameters, see Eqs. (6). From Fig.…”

Section: Discussionmentioning

confidence: 97%

“…In the first approach which is usually called as the phenomenological approach, a specific form including some free parameters is proposed for the desired FF so that all these free parameters are extracted through experimental data analysis, see, for example, Refs. [3][4][5][6][7][8][9][10][11][12][13][14][15]. In an alternative scheme based on the theoretical models, the heavy hadron FFs might be computed by the virtue of perturbative QCD with limited phenomenological parameters, see, for example, Refs.…”

Section: Introductionmentioning

confidence: 99%

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$Λ_c^+$ fragmentation functions from pQCD approach and the Suzuki model

Delpasand,

Nejad,

Soleymaninia

2020

Preprint

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Through data analysis, we present new sets of nonperturbative fragmentation functions (FFs) for Λ + c baryon both at leading and next-to-leading order (NLO) and, for the first time, at next-to-nextto-leading order (NNLO) in the minimal subtraction factorization scheme with five massless quarks. The FFs are determined by fitting all available data of inclusive single Λ + c baryon production in e + e − annihilation taken by the OPAL Collaboration at CERN LEP1 and Belle Collaboration at KEKB. We also estimate the uncertainties in the Λ + c FFs as well as in the corresponding observables. In a completely different approach based on the Suzuki model, we will theoretically calculate the Λ + c FF from charm quark and present our result at leading order perturbative QCD framework. A comparison confirms a good consistency between both approaches. We will also apply the Λ + c FFs to make theoretical predictions for the energy distribution of Λ + c produced through the top quark decay, to be measured at the CERN LHC.

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“…For our data analysis, we adopted the same functional form for the parameterization of charm and bottom FFs with three free parameters, see Eqs. (6). From Fig.…”

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

$Λ_c^+$ fragmentation functions from pQCD approach and the Suzuki model

Delpasand,

Nejad,

Soleymaninia

2020

Preprint

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“…This would be possible by using the nonperturbative (b, g) → π/K /P/D + FFs presented in Refs. [42][43][44][45].…”

Section: Discussionmentioning

confidence: 99%

Probing heavy charged Higgs bosons through bottom flavored hadrons in the $$H^+\rightarrow \bar{b}t\rightarrow B+X$$ channel in 2HDM

Nejad

Yarahmadi

2021

Eur. Phys. J. C

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Observing light or heavy charged Higgs bosons $$H^\pm $$ H ± , lighter or heavier than the top quark, would be instant evidence of physics beyond the Standard Model. For this reason, in recent years searches for charged Higgs bosons have been in the center of attention of current colliders such as the CERN Large Hadron Collider (LHC). In spite of all efforts, no signal has been yet observed. Especially, the results of CMS and ATLAS experiments have excluded a large region in the MSSM $$m_{H^+}-\tan \beta $$ m H + - tan β parameter space for $$m_{H^+}=80{-}160$$ m H + = 80 - 160 GeV corresponding to the entire range of $$\tan \beta $$ tan β up to 60. Therefore, it seems that one should concentrate on probing heavy charged Higgs bosons ($$m_{H^\pm }>m_t$$ m H ± > m t ) so in this context each new probing channel is welcomed. In this work, we intend to present our proposed channel to search for heavy charged Higgses through the study of scaled-energy distribution of bottom-flavored mesons (B) inclusively produced in charged Higgs decay, i.e., $$H^+\rightarrow t\bar{b}\rightarrow B+X$$ H + → t b ¯ → B + X . Our study is carried out within the framework of the generic two Higgs doublet model (2HDM) using the massless scheme where the zero mass parton approximation is adopted for bottom quark.

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“…The direct link between the dynamics governing DGLAP-evolving VFNS FFs and the stabilization pattern of the hybrid factorization was initially uncovered via studies of semi-hard emissions of singly heavy-flavored hadrons, including 𝐷 mesons [292][293][294][295][296][297][298][299][300], Λ 𝑐 hyperons [293,301,302], and 𝑏-flavored ( 𝑏 ) hadrons [303][304][305][306][307][308][309][310][311].…”

Section: Rise and Discovery Of The Natural Stabilitymentioning

confidence: 99%

Vector Quarkonia at the LHC with Jethad: A High-Energy Viewpoint

Celiberto

2023

Universe

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In this review, we discuss and extend the study of the inclusive production of vector quarkonia, J/ψ and Υ, emitted with large transverse momenta and rapidities at the LHC. We adopt the novel ZCW19+ determination of fragmentation functions to depict the quarkonium production mechanism at the next-to-leading level of perturbative QCD. This approach is based on the nonrelativistic QCD formalism well adapted to describe the formation of a quarkonium state from the collinear fragmentation of a gluon or a constituent heavy quark at the lowest energy scale. We rely upon the NLL/NLO+ hybrid high-energy and collinear factorization for differential cross-sections, where the collinear formalism is enhanced by the BFKL resummation of next-to-leading energy logarithms arising in the t-channel. We employ the method to analyze the behavior of the rapidity distributions for double-inclusive vector quarkonium and inclusive vector quarkonium plus jet emissions. We discover that the natural stability of the high-energy series, previously seen in observables sensitive to the emission of hadrons with heavy flavor detected in the rapidity acceptance of LHC barrel calorimeters, becomes even more manifest when these particles are tagged in forward regions covered by endcaps. Our findings present the important message that vector quarkonia at the LHC via hybrid factorization offer a unique chance to perform precision studies of high-energy QCD, as well as an intriguing opportunity to shed light on the quarkonium production puzzle.

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Determination of Ds+ meson fragmentation functions through two different approaches

Cited by 19 publications

References 65 publications

$Λ_c^+$ fragmentation functions from pQCD approach and the Suzuki model

$Λ_c^+$ fragmentation functions from pQCD approach and the Suzuki model

Probing heavy charged Higgs bosons through bottom flavored hadrons in the $$H^+\rightarrow \bar{b}t\rightarrow B+X$$ channel in 2HDM

Vector Quarkonia at the LHC with Jethad: A High-Energy Viewpoint

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