First QCD analysis of charged hadron fragmentation functions and their uncertainties at next-to-next-to-leading order

Soleymaninia, Maryam; Goharipour, Muhammad; Khanpour, Hamzeh

doi:10.1103/physrevd.98.074002

Cited by 26 publications

(36 citation statements)

References 148 publications

(187 reference statements)

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“…First, we discuss the details of the analysis, together with the framework that need to be considered in order to deal with the determination of the TMD FFs, such as the parameterization of the TMD FFs at the input scale. Then, following the SGK-FFs methodology [29,30], we present the method of the minimization and the uncertainties associated with the TMD FFs which are estimated using the standard Hessian approach. Now we are in a position to present the SK19 TMD FFs parametrization form for the phenomenological study of the transverse momentum distributions.…”

Section: Fitting Methodology and Sk19 Tmd Ffs Parametrizationmentioning

confidence: 99%

“…The most recent calculations for the unpolarized FFs for various hadrons and at different QCD accuracies can be found in Refs. [29,30,[33][34][35][36][37][38][39][40]. For the unpolarized FFs in Eq.…”

Section: Factorization Framework and Tmd Ffsmentioning

confidence: 99%

“…We show that an accurate predictions can be obtained considering the features of TMD factorization and evolution in the nonperturbative QCD. The SK19 TMD FFs sets are constructed following the general fitting methodology outlined in previous SGK FFs studies [29,30], which utilizes "Hessian" techniques to obtain a faithful estimate of TMD FFs uncertainties. Together with several other improvements, we present a validation of the SK19 TMD FFs results through detailed comparison with the analyzed datasets.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transverse momentum dependent of charged pion, kaon, and proton/antiproton fragmentation functions from e+e− annihilation process

Soleymaninia

Khanpour

2019

Phys. Rev. D

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The main aim of this paper is a new determination of transverse momentum dependence of unpolarized fragmentation function (TMD FFs) in single inclusive hadron production in electron-positron annihilation (SIA) processes. Motivated by the need for a reliable and consistent determination of TMD FFs, we use the most recent TMD production cross sections of charged pions (π ± ), kaons (K ± ) and protons/antiprotons (p/p) measured in inclusive e + e − collisions by Belle Collaboration. These datasets are the first identified light charged hadron measurements which depend on the transverse momentum in SIA process. In this analysis, referred to as SK19 TMD FFs, the common Gaussian distribution is used for the P hT dependent of the cross section. The uncertainties in the extraction of SK19 TMD FFs are estimated using the standard "Hessian" technique. We study the quality of the TMD FFs determined in this analysis by comparing with the available recent Belle cross sections measurement. For all hadron species, we found a very good agreement between this particular set of experimental data and the corresponding theory calculations over a relatively wide range of transverse momentum P hT . As a result of this study, suggestions were identified for possible future research considering the theory improvements and other available experimental observables.

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Section: Fitting Methodology and Sk19 Tmd Ffs Parametrizationmentioning

confidence: 99%

Section: Factorization Framework and Tmd Ffsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transverse momentum dependent of charged pion, kaon, and proton/antiproton fragmentation functions from e+e− annihilation process

Soleymaninia

Khanpour

2019

Phys. Rev. D

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“…In Ref. [11] we presented our QCD analysis of charged hadron FFs and their uncertainties at NLO and NNLO (SGK18) which is the first determination of light charged hadron FFs at NNLO accuracy. Finally in Ref.…”

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confidence: 99%

Impact of unidentified light charged hadron data on the determination of pion fragmentation functions

2019

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In this paper a new comprehensive analysis of parton-to-pion fragmentation functions (FFs) is performed for the first time by including all experimental data sets on single inclusive pion as well as unidentified light charged hadron production in electron-positron (e + e − ) annihilation. We determine the pion FFs along with their uncertainties using the standard "Hessian" technique at next-to-leading order (NLO) and next-to-next-to leading order (NNLO) in perturabative QCD. It is shown that the determination of pion FFs using simultaneously the data sets from pion and unidentified light charged hadron productions leads to the reduction of all pion FFs uncertainties especially for the case of strange quark and gluon FFs by significant factors. In this study, we have quantified the constraints that these data sets could impose on the extracted pion FFs. Our results also illustrate the significant improvement in the precision of FFs fits achievable by inclusion of higher order corrections. The improvements on both FFs uncertainties as well as fit quality have been clearly discussed.

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“…Instead, processes such as e + e − → h + X are only sensitive to the gluon fragmentation function at NLO and through evolution effects. See [12] for an overview of fragmentation functions and recent extractions can be found in [13][14][15][16][17][18][19][20][21][22]. By now, a wide range of identified particles inside the jet have been considered.…”

Section: Introductionmentioning

confidence: 99%

Hadron-in-jet production at partonic threshold

Kaufmann¹,

Liu

Mukherjee

et al. 2020

J. High Energ. Phys.

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We consider the longitudinal momentum distribution of hadrons inside jets in proton-proton collisions. At partonic threshold large double logarithmic corrections arise which need to be resummed to all orders. We develop a factorization formalism within SCET that allows for the joint resummation of threshold and jet radius logarithms. We achieve next-to-leading logarithmic NLL accuracy by including non-global logarithms in the leading-color approximation. Overall, we find that the threshold resummation leads to a sizable enhancement of the cross section and a reduced QCD scale dependence, suggesting that the all-order resummation can be important for the reliable extraction of fragmentation functions in global analyses when jet substructure data is included.

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First QCD analysis of charged hadron fragmentation functions and their uncertainties at next-to-next-to-leading order

Cited by 26 publications

References 148 publications

Transverse momentum dependent of charged pion, kaon, and proton/antiproton fragmentation functions from e+e− annihilation process

Transverse momentum dependent of charged pion, kaon, and proton/antiproton fragmentation functions from e+e− annihilation process

Impact of unidentified light charged hadron data on the determination of pion fragmentation functions

Hadron-in-jet production at partonic threshold

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