QCD corrections to charged Higgs-mediated b → c τ ν decay

Yuval Grossman; Howard E. Haber; Yosef Nir

doi:10.1016/0370-2693(95)00946-I

QCD corrections to charged Higgs-mediated b → c τ ν decay

Yuval Grossman, Howard E. Haber, Yosef Nir

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

We calculate the O(α_s) corrections to the charged Higgs mediated inclusive semi-tauonic B decay. By working in the Landau gauge, we demonstrate how to obtain the charged Higgs contributions (both direct and interference terms) from the known QCD corrections to t → bH⁺. Combining our results with O( 1 m_b²) corrections to the spectator model and comparing the theoretical prediction with the recent experimental measurements, we find a model-independent 2σ upper bound on the ratio of Higgs vacuum expectation values, tan β < 0.52( m_H 1 GeV).

Original language	English
Pages (from-to)	630-636
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	357
Issue number	4
DOIs	https://doi.org/10.1016/0370-2693(95)00946-I
State	Published - 14 Sep 1995
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported in part by the United States-Israel Binational Science Foundation (BSF) . YG thanks Zoltan Ligeti for useful discussions. HEH would like to gratefully acknowledget he kind hospitality of the Weizmann Institute of Science, where this work was completed.T he work of YN is supportedi n part by the BSF, by the Israel Commission for Basic Researcha nd by the Minerva Foundation.

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10.1016/0370-2693(95)00946-I

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title = "QCD corrections to charged Higgs-mediated b → c τ ν decay",

abstract = "We calculate the O(αs) corrections to the charged Higgs mediated inclusive semi-tauonic B decay. By working in the Landau gauge, we demonstrate how to obtain the charged Higgs contributions (both direct and interference terms) from the known QCD corrections to t → bH+. Combining our results with O( 1 mb2) corrections to the spectator model and comparing the theoretical prediction with the recent experimental measurements, we find a model-independent 2σ upper bound on the ratio of Higgs vacuum expectation values, tan β < 0.52( mH 1 GeV).",

author = "Yuval Grossman and Haber, {Howard E.} and Yosef Nir",

note = "Funding Information: This work was supported in part by the United States-Israel Binational Science Foundation (BSF) . YG thanks Zoltan Ligeti for useful discussions. HEH would like to gratefully acknowledget he kind hospitality of the Weizmann Institute of Science, where this work was completed.T he work of YN is supportedi n part by the BSF, by the Israel Commission for Basic Researcha nd by the Minerva Foundation.",

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doi = "10.1016/0370-2693(95)00946-I",

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T1 - QCD corrections to charged Higgs-mediated b → c τ ν decay

AU - Grossman, Yuval

AU - Haber, Howard E.

AU - Nir, Yosef

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PY - 1995/9/14

Y1 - 1995/9/14

N2 - We calculate the O(αs) corrections to the charged Higgs mediated inclusive semi-tauonic B decay. By working in the Landau gauge, we demonstrate how to obtain the charged Higgs contributions (both direct and interference terms) from the known QCD corrections to t → bH+. Combining our results with O( 1 mb2) corrections to the spectator model and comparing the theoretical prediction with the recent experimental measurements, we find a model-independent 2σ upper bound on the ratio of Higgs vacuum expectation values, tan β < 0.52( mH 1 GeV).

AB - We calculate the O(αs) corrections to the charged Higgs mediated inclusive semi-tauonic B decay. By working in the Landau gauge, we demonstrate how to obtain the charged Higgs contributions (both direct and interference terms) from the known QCD corrections to t → bH+. Combining our results with O( 1 mb2) corrections to the spectator model and comparing the theoretical prediction with the recent experimental measurements, we find a model-independent 2σ upper bound on the ratio of Higgs vacuum expectation values, tan β < 0.52( mH 1 GeV).

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JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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QCD corrections to charged Higgs-mediated b → c τ ν decay

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