On the fragmentation functions of heavy quarks into hadrons

Kartvelishvili, V.; Likhoded, A. K.; Petrov, V.

doi:10.1016/0370-2693(78)90653-6

Cited by 305 publications

(277 citation statements)

References 3 publications

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“…The thickness of the band from scale variation yields a theoretical uncertainty ±3.5 GeV on m t . These results are essentially unchanged switching between the two parametrizations of the fragmentation functions of [62] and [63]. The comparison with the results from the analysis of bjets highlights a loss of the correlation between the physical observables and the top quark mass, as expected from the fact that the B-hadron is only a subset of the products of the b quark hadronization.…”

Section: B-hadrons Resultsmentioning

confidence: 71%

“…We describe the formation of B-hadrons at NLO in the fragmentation functions formalism [51], performing a calculation largely analogous to that of Ref. [40] with inputs from [60,61] for the parameterizations [62,63] of the fragmentation functions. With this method we obtain energy spectra for B-hadrons for each choice of the renormalization, factorization, and fragmentation scales.…”

Section: B-hadrons Resultsmentioning

confidence: 99%

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Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD

et al. 2016

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We analyze the energy spectra of single b-jets and B-hadrons resulting from the production and decay of top quarks within the SM at the LHC at the NLO QCD. For both hadrons and jets, we calculate the correlation of the peak of the spectrum with the top quark mass, considering the "energy peak" as an observable to determine the top quark mass. Such a method is motivated by our previous work where we argued that this approach can have reduced sensitivity to the details of the production mechanism of the top quark, whether it concerns higher-order QCD effects or new physics contributions. For a 1% jet energy scale uncertainty, the top quark mass can then be extracted using the energy peak of b-jets with an error ±(1.2(exp) + 0.6(th)) GeV. In view of the dominant jet energy scale uncertainty in the measurement using b-jets, we also investigate the extraction of the top quark mass from the energy peak of the corresponding B-hadrons which, in principle, can be measured without this uncertainty. The calculation of the B-hadron energy spectrum is carried out using fragmentation functions at NLO. The dependence on the fragmentation scale turns out to be the largest theoretical uncertainty in this extraction of top quark mass.

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Section: B-hadrons Resultsmentioning

confidence: 71%

Section: B-hadrons Resultsmentioning

confidence: 99%

Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD

et al. 2016

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“…In this way one can test the large-scale features of any model, although the detailed structure may not be reproduced exactly. We consider the perturbative QCD calculations of Collins & Spiller (CS) [5] and Braaten et al (BCFY) [7], as well as the phenomenological models of Kartvelishvili et al for mesons (KLP-M) [9] and baryons (KLP-B) [13], Bowler [10], Peterson et al [11], the Lund group [12], the UCLA group [14] and the HERWIG group [32]. The latter two include heavy quark fragmentation within their own generators, and the other seven predict the functional forms listed in Table III.…”

Section: B Tests Of C-quark Fragmentation Modelsmentioning

confidence: 99%

“…The observable P (x p ) is thought to be related by a simple convolution or hadronization model. Several phenomenological models of heavy-quark fragmentation have been proposed [9,10,11,12]. Predictions depend on the mass of the heavy quark, with P (x p ) being much harder for b hadrons than c hadrons, and in some cases on the mass and quantum numbers of H. Hadrons containing the same heavy quark type are generally predicted to have quite similar P (x p ), although differences between mesons and baryons have been suggested [13,14].…”

Section: Introductionmentioning

confidence: 99%

InclusiveΛc+production ine+e−annihilations at
Aubert¹,
Bóna²,
Boutigny³
et al. 2007
Phys. Rev. D
18
0
7
0
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We present measurements of the total production rates and momentum distributions of the charmed baryon Λ + c in e + e − → hadrons at a center-of-mass energy of 10.54 GeV and in Υ (4S) decays. In hadronic events at 10.54 GeV, charmed hadrons are almost exclusively leading particles in e + e − → cc events, allowing direct studies of c-quark fragmentation. We measure a momentum distribution for Λ + c baryons that differs significantly from those measured previously for charmed mesons. Comparing with a number of models, we find none that can describe the distribution completely. We measure an average scaled momentum of xp = 0.574±0.009 and a total rate of N qq Λc = 0.057±0.002(exp.)±0.015(BF) Λ + c per hadronic event, where the experimental error is much smaller than that due to the branching fraction into the reconstructed decay mode, pK − π + . In Υ (4S) decays we measure a total rate of N Υ Λc = 0.091±0.006(exp.)±0.024(BF) per Υ (4S) decay, and find a much softer momentum distribution than expected from B decays into a Λ + c plus an antinucleon and one to three pions.

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“…This change resulted in b E a 2% change in the efficiency. In addition, the heavy-quark fragmentation model was changed to w x that suggested by Collins and Spiller 25 and to that w x of Kartvelishvili et al 26 , with parameters tuned w x according to Ref. 27 .…”

Section: Fragmentation Modellingmentioning

confidence: 99%

Search for new physics in rare B decays

et al. 2000

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A search for the decay B " ™K " K " p . was performed using data collected by the OPAL detector at LEP. These decays are strongly suppressed in the Standard Model but could occur with a higher branching ratio in supersymmetric models, especially in those with R-parity violating couplings. No evidence for a signal was observed and a 90% confidence level upper limit of 1.29 = 10 y4 was set for the branching ratio. q

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On the fragmentation functions of heavy quarks into hadrons

Cited by 305 publications

References 3 publications

Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD

Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD

InclusiveΛc+production ine+e−annihilations at
Aubert¹,
Bóna²,
Boutigny³
et al. 2007
Phys. Rev. D
18
0
7
0
View full text Add to dashboard Cite

Search for new physics in rare B decays

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On the fragmentation functions of heavy quarks into hadrons

Cited by 305 publications

References 3 publications

Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD

Top quark mass determination from the energy peaks of b-jets and B-hadrons at NLO QCD

InclusiveΛc+production ine+e−annihilations atAubert1, Bóna2, Boutigny3 et al. 2007Phys. Rev. D18070View full textAdd to dashboardCite

Search for new physics in rare B decays

Contact Info

Product

Resources

About

InclusiveΛc+production ine+e−annihilations at
Aubert¹,
Bóna²,
Boutigny³
et al. 2007
Phys. Rev. D
18
0
7
0
View full text Add to dashboard Cite