B -hadron fragmentation functions at next-to-next-to-leading order from a global analysis of e+e− annihilation data
| Autor: | Bernd A. Kniehl, Maryam Soleymaninia, Maral Salajegheh, S. Mohammad Moosavi Nejad, Hamzeh Khanpour |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Quark Aleph Particle physics Annihilation Large Hadron Collider 010308 nuclear & particles physics High Energy Physics::Phenomenology Hadron Observable 01 natural sciences Massless particle Factorization 0103 physical sciences High Energy Physics::Experiment Nuclear Experiment 010306 general physics |
| Zdroj: | Physical Review D. 99 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.99.114001 |
| Popis: | We present nonperturbative fragmentation functions (FFs) for bottom-flavored (B) hadrons both at next-to-leading (NLO) and, for the first time, at next-to-next-to-leading order in the ¯¯¯¯¯¯MS factorization scheme with five massless quark flavors. They are determined by fitting all available experimental data of inclusive single B-hadron production in e+e− annihilation, from the ALEPH, DELPHI, and OPAL collaborations at CERN LEP1 and the SLD collaboration at SLAC SLC. The uncertainties in these FFs as well as in the corresponding observables are estimated using the Hessian approach. We perform comparisons with available NLO sets of B-hadron FFs. We apply our new FFs to generate theoretical predictions for the energy distribution of B hadrons produced through the decay of unpolarized or polarized top quarks, to be measured at the CERN LHC. |
| Databáze: | OpenAIRE |
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