“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 12302
School of Particles and Accelerator
  Title:   B mesons from top-quark decay in the presence of the charged Higgs boson in the Zero-mass variable-flavor-number Scheme
  Author(s):  Seyed Mohammad Moosavi Nejad
  Status:   Published
  Journal: Phys. Rev. D
  Vol.:  85
  Year:  2012
  Pages:   054010
  Supported by:  IPM
We study the energy spectrum of the inclusive bottom-flavored mesons in top quark decay into a charged-Higgs boson and a massless bottom quark at next-to-leading order (NLO) in the two-Higgs-doublet model. To extract the results we work in the Zero-Mass Variable-Flavor-Number scheme (ZM-VFNs) using realistic nonperturbative fragmentation functions obtained through a global fit to e+e data from CERN LEP1 and SLAC SLC on the Z-boson resonance. we study both the contribution of the bottom quark fragmentation and the gluon fragmentation to produce the bottom-flavored meson (B-Meson). we find that the contribution of the gluon leads to an appreciable reduction in decay rate at low values of the B-meson energy. It means the NLO corrections are significant.

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