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-hadron fragmentation functions at next-to-next-to-leading order from a global analysis of 
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 annihilation data

We calculate, for the first time, the NNLO QCD corrections to identified heavy hadron production at hadron colliders. The calculation is based on a flexible numeric framework which allows the calculation of any distribution of a single identified heavy hadron plus jets and non-QCD particles. As a first application we provide NNLO QCD predictions for several differential distributions of B hadrons in t$$ \overline{t} $$ t ¯ events at the LHC. Among others, these predictions are needed for the precise determination of the top quark mass. The extension of our results to other processes, like open or associated B and charm production is straightforward. We also explore the prospects for extracting heavy flavor fragmentation functions from LHC data.

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“…A third extraction, which follows an approximation of the PFF approach, was presented in ref. [30], but has not been used here.…”

Section: Jhep10(2021)216 4 Perturbative and Non-perturbative Fragmentation Functions For Heavy Flavor Fragmentationmentioning

confidence: 99%

B-hadron production in NNLO QCD: application to LHC t$$ \overline{t} $$ events with leptonic decays

Czakon

Generet

Mitov

et al. 2021

J. High Energ. Phys.

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“…These FFs have been determined through a global fit to electronpositron annihilation data presented by ALEPH [36] and OPAL [37] at CERN LEP1 and by SLD [38] at SLAC SLC. According to the approach used in [35], the power ansatz…”

Section: Numerical Resultsmentioning

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 first set of nonperturbative FFs for bottomflavored hadrons (B-hadrons), both at NLO and NNLO in the ZM-VFNS, was presented in our previous work [51] by fitting to all available experimental data of inclusive single B-hadron production in e + e − annihilation, e + e − → B + X, from ALEPH [52], OPAL [53], SLD [54], and DELPHI [55]. In Ref.…”

Section: Discussionmentioning

confidence: 99%

NNLO charmed-meson fragmentation functions and their uncertainties in the presence of meson mass corrections

et al. 2019

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The main aim of this paper is to present new sets of non-perturbative fragmentation functions (FFs) for D 0 and D + mesons at next-to-leading (NLO) and, for the first time, at next-to-next-toleading order (NNLO) in the MS factorization scheme with five massless quark flavors. This new determination of FFs is based on the QCD fit to the OPAL experimental data for hadron production in the electron-positron single-inclusive annihilation (SIA). We discuss in detail the novel aspects of the methodology used in our analysis and the validity of obtained FFs by comparing with previous works in literature which have been carried out up to NLO accuracy. We will also incorporate the effect of charmed meson mass corrections into our QCD analysis and discuss the improvements upon inclusion of these effects. The uncertainties in the extracted FFs as well as in the corresponding observables are estimated using the "Hessian" approach. For a typical application, we use our new FFs to make theoretical predictions for the energy distributions of charmed mesons inclusively produced through the decay of unpolarized top quarks, to be measured at the CERN LHC. As a result of this analysis, suggestions are discussed for possible future studies on the current topic to consider any theory improvements and other available experimental observables.

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B -hadron fragmentation functions at next-to-next-to-leading order from a global analysis of e+e− annihilation data

Cited by 41 publications

References 48 publications

B-hadron production in NNLO QCD: application to LHC t$$ \overline{t} $$ events with leptonic decays

B-hadron production in NNLO QCD: application to LHC t$$ \overline{t} $$ events with leptonic decays

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

NNLO charmed-meson fragmentation functions and their uncertainties in the presence of meson mass corrections

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