Tau longitudinal polarization in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mover accent="true"><mml:mi>B</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mo>→</mml:mo><mml:mi>D</mml:mi><mml:mi>τ</mml:mi><mml:mover accent="true"><mml:mi>ν</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math>and its role in the search for the charged Higgs boson

Tanaka, Minoru; Watanabe, Ryoutaro

doi:10.1103/physrevd.82.034027

Cited by 123 publications

(126 citation statements)

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“…The semitaunic decays B → D ( * ) τ ν τ have drawn a lot of attention in recent years as sensitive probes of NP [1][2][3][4][5][6]. The present experimental status is summarized in Fig.…”

Section: Introductionmentioning

confidence: 99%

Looking for possible new physics in B→D(*)τντ in light of recent data

2017

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We study the decays B → D ( * ) τ ντ in light of the available data from BABAR, Belle and LHCb. We divide our analysis into two parts: in one part we fit the form-factors in these decays directly from the data without adding any additional new physics (NP) contributions and compare our fit results with those available from the decays B → D ( * ) ν . We find that the q 2 -distributions of the formfactors associated with the pseudo-vector current, obtained from B → D ( * ) τ ντ and B → D ( * ) ν respectively, do not agree with each other, whereas the other form-factors are consistent with each other. In the next part of our analysis, we look for possible new effective operators of dimension 6 amongst new vector, scalar, and tensor-type that can best explain the current data in the decays B → D ( * ) τ ντ . We use the information-theoretic approaches, especially of 'Second-order Akaike Information Criterion' (AICc) in the analysis of empirical data. Normality tests for the distribution of residuals are done after selecting the best possible scenarios, for cross-validation. We find that it is the contribution from the operator involving left or right-handed vector current that passes all the selection criteria defined for the best-fit scenario and can successfully accommodate all the available data set.

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Section: Introductionmentioning

confidence: 99%

Looking for possible new physics in B→D(*)τντ in light of recent data

2017

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“…Extended models including the charged Higgs bosons are sensitive to these decays [1,2,3,4,5,6,7,8,9]. In this report, recent results obtained at the B factories are reviewed.…”

Section: Introductionmentioning

confidence: 99%

B\rightarrow \tau \nu and B\rightarrow D(*)\tau \nu at Belle and BaBar

Horii¹

2013

Proceedings of 14th International Conference on B-Physics at Hadron Machines — PoS(Beauty 2013)

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The leptonic B → τν decay and the semileptonic B → D ( * ) τν decays provide opportunities for testing the Standard Model and for searching for new physics. These decays are sensitive to extended models including the charged Higgs bosons. In this report, recent results obtained at the B factories are reviewed. The comparison between the experimental results and the Standard Model predictions is shown. The constraints on the type II two-Higgs doublet model are reported. The measurements play a role complementary to the studies at the energy frontiers.

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“…τ have already shown the new physics contributions can be over-constrained [7][8][9][10]. The existing studies of theB → D ( * ) τ −ν τ based on two-Higgs-doublet model (2HDM) predict a substantial impact on the ratio R(D ( * ) ) and R(D) [7,8,10,12].…”

Section: Introductionmentioning

confidence: 99%

“…The existing studies of theB → D ( * ) τ −ν τ based on two-Higgs-doublet model (2HDM) predict a substantial impact on the ratio R(D ( * ) ) and R(D) [7,8,10,12].…”

Section: Introductionmentioning

confidence: 99%

Search For New Physics at BABAR

Godang

2013

EPJ Web of Conferences

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Abstract. Using a full BABAR data sample of 426 f b −1 , we present improved measurements of the ratio, where is either electron or muon. We measure R(D) = 0.440 ± 0.058 ± 0.042 and R(D * ) = 0.332 ± 0.024 ± 0.018. These ratios exceed the Standard Model predictions by 2.0σ and 2.7σ, respectively. The results disagree with the Standard Model predictions at the level of 3.4σ. The ratios are sensitive to new physics contributions in the form of a charged Higgs boson. However, the access cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model.

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Tau longitudinal polarization inB¯→Dτν¯and its role in the search for the charged Higgs boson

Cited by 123 publications

References 50 publications

Looking for possible new physics in B→D(*)τντ in light of recent data

Looking for possible new physics in B→D(*)τντ in light of recent data

B\rightarrow \tau \nu and B\rightarrow D(*)\tau \nu at Belle and BaBar

Search For New Physics at BABAR

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