Publisher’s Note: Determination of pion and kaon fragmentation functions including spin asymmetries data in a global analysis [Phys. Rev. D 88, 054019 (2013)]

Soleymaninia, Maryam; Khorramian, Ali N.; Nejad, S. Mohammad Moosavi; Arbabifar, F.

doi:10.1103/physrevd.89.039901

Cited by 21 publications

(29 citation statements)

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“…Clearly, if m b = 0 and m B = 0 are put (z → x B /x a ), then (31) and (32) coincide by reproducing the familiar factorization formula of the massless parton model.…”

Section: Hadron Mass Effects and Hadron Level Resultsmentioning

confidence: 99%

“…Our formalism elaborated here is also applicable to the production of hadron species other than B-hadrons, such as pions, kaons and protons, etc., using the b, g → π/K /P FFs presented in our recent paper [31][32][33], relying on their universality and scaling violations. …”

Section: Discussionmentioning

confidence: 99%

“…In (31), the factorization (μ F ) and the renormalization (μ R ) scales are arbitrary and, in principle, one can use two different values for them. However, a choice often made consists of setting μ R = μ F and we shall adopt this convention for most of the results which we shall show.…”

Section: Numerical Analysismentioning

confidence: 99%

“…To include the B-meson and the b-quark masses, we apply Eq. (32) in which for the transitions (b, g) → B, from [30] we employ the related realistic and nonperturbative FFs. In [30], a power model as…”

Section: Numerical Analysismentioning

confidence: 99%

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Hadron energy spectrum in polarized top-quark decays considering the effects of hadron and bottom quark masses

Nejad

Balali

2016

Eur. Phys. J. C

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We present the analytical expressions for the next-to-leading order corrections to the partial decay width t (↑) → bW + , followed by b → H b X , for nonzero b-quark mass (m b = 0) in the fixed-flavor-number scheme (FFNs). To make the predictions for the energy distribution of outgoing hadrons H b , as a function of the normalized H b -energy fraction x H , we apply the general-mass variable-flavor-number scheme (GM-VFNs) in a specific helicity coordinate system where the polarization of top quark is evaluated relative to the b-quark momentum. We also study the effects of gluon fragmentation and finite hadron mass on the hadron energy spectrum so that hadron masses are responsible for the lowx H threshold. In order to describe both the b-quark and the gluon hadronizations in top decays we apply realistic and nonperturbative fragmentation functions extracted through a global fit to the e + e − annihilation data from CERN LEP1 and SLAC SLC by relying on their universality and scaling violations.

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“…Clearly, if m b = 0 and m B = 0 are put (z → x B /x a ), then (31) and (32) coincide by reproducing the familiar factorization formula of the massless parton model.…”

Section: Hadron Mass Effects and Hadron Level Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Numerical Analysismentioning

confidence: 99%

Section: Numerical Analysismentioning

confidence: 99%

See 2 more Smart Citations

Hadron energy spectrum in polarized top-quark decays considering the effects of hadron and bottom quark masses

Nejad

Balali

2016

Eur. Phys. J. C

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“…There are several theoretical studies on QCD analysis of FFs which used special parametrization and different experimental data in their global analysis. Recent extracted FFs are related to SKMA [1], AKK [18], DSSV [19] and HKNS [20], using different phenomenological models. Since the hadronization mechanism is universal and independent of the perturbative process which produces partons, one can exploit, for example, the existing data on e + e − → bb events to fit such models and describe the bquark non-perturbative fragmentation in other processes, such as top decay.…”

Section: Introductionmentioning

confidence: 99%

Global analysis of π^± and K^± fragmentation functions and their application to top quark decays considering new BABAR and Belle experimental data

2017

Self Cite

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Abstract. Recently, the Belle and BABAR Collaborations published the single-inclusive electron-positron annihilation data at the center of mass energies ( √ s) of 10.52 GeV and 10.54 GeV, respectively. These new data offer one the possibility to determine the nonperturbative initial conditions of fragmentation functions much more accurately. In our previous work [1], we extracted the fragmentation functions for π ± and K ± particles at next-to-leading order (NLO) including these new data, for the first time. These new data are in the regions of larger scaled-energy z and lower √ s. Our main purpose is to show that adding these new data in our analysis how much improve the fragmentation functions of π ± and K ± at NLO. We hope this analysis can obvious the effects of these recent data on FFs for whom is studying the behavior of light meson FFs. We also apply, for the first time, the extracted fragmentation functions to make our predictions for the scaled-energy distributions of π ± and K ± inclusively produced in polarized top quark decays at NLO.

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Confronting current NLO parton fragmentation functions with inclusive charged-particle spectra at hadron colliders

et al. 2014

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The inclusive spectra of charged particles measured at high transverse momenta (p T 2 GeV/c) in proton-proton and proton-antiproton collisions in the range of center-of-mass energies √ s = 200-7000 GeV are compared with next-to-leading order perturbative QCD calculations using seven recent sets of parton-to-hadron fragmentation functions (FFs). Accounting for the uncertainties in the scale choices and in the parton distribution functions, we find that most of the theoretical predictions tend to overpredict the measured LHC and Tevatron cross sections by up to a factor of two. We identify the currently too-hard gluon-to-hadron FFs as the probable source of the problem, and justify the need to refit the FFs using the available LHC and Tevatron data in a region of transverse momenta, p T

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Publisher’s Note: Determination of pion and kaon fragmentation functions including spin asymmetries data in a global analysis [Phys. Rev. D 88, 054019 (2013)]

Cited by 21 publications

References 0 publications

Hadron energy spectrum in polarized top-quark decays considering the effects of hadron and bottom quark masses

Hadron energy spectrum in polarized top-quark decays considering the effects of hadron and bottom quark masses

Global analysis of π^± and K^± fragmentation functions and their application to top quark decays considering new BABAR and Belle experimental data

Confronting current NLO parton fragmentation functions with inclusive charged-particle spectra at hadron colliders

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Publisher’s Note: Determination of pion and kaon fragmentation functions including spin asymmetries data in a global analysis [Phys. Rev. D 88, 054019 (2013)]

Cited by 21 publications

References 0 publications

Hadron energy spectrum in polarized top-quark decays considering the effects of hadron and bottom quark masses

Hadron energy spectrum in polarized top-quark decays considering the effects of hadron and bottom quark masses

Global analysis of π± and K± fragmentation functions and their application to top quark decays considering new BABAR and Belle experimental data

Confronting current NLO parton fragmentation functions with inclusive charged-particle spectra at hadron colliders

Contact Info

Product

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About

Global analysis of π^± and K^± fragmentation functions and their application to top quark decays considering new BABAR and Belle experimental data