Addendum to “Impact of polarization observables and 
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 on new physics explanations of the 
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Blanke, Monika; Crivellin, Andreas; Kitahara, Teppei; Moscati, Marta; Nierste, Ulrich; Nišandžić, Ivan

doi:10.1103/physrevd.100.035035

Cited by 120 publications

(111 citation statements)

References 27 publications

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“…the new Belle measurements, see Refs. [33][34][35][36][37]) 1 . On the other hand, particular NP scenarios such as: charged scalars [46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62], leptoquarks (both scalar and vector) , extra gauge bosons [47,94,[98][99][100][101][102][103][104][105][106][107][108][109][110][111], right-handed neutrinos [62,[106][107][108][109][110][111][112][113], R-parity violating (RPV) supersymmetric couplings [31,[114][115]…”

Section: Introductionmentioning

confidence: 99%

Charged current b→cτν¯τ anomalies in a general W′ boson scenario

2019

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The very recent experimental information obtained from Belle experiment, along with the one accumulated by the BABAR and LHCb experiments have shown the existence of anomalies in the ratios R(D) and R(D * ) associated with the charged current transition b → cτντ . Although the Belle measurements are in agreement with the SM predictions, the new experimental world averages still exhibit a tension. In addition, the D * longitudinal polarization FL(D * ) related with the channel B → D * τντ observed by the Belle and the ratio R(J/ψ) measured by the LHCb also show discrepancies with their corresponding SM estimations. In this work, we present a modelindependent study based on the most general effective Lagrangian that yields to a tree-level effective contribution to the transition b → cτντ induced by a general W gauge boson. Instead of considering any specific new physics (NP) realization, we performed an analysis by considering all the different chiral charges to the charm-bottom and τ -ντ interaction terms with a charged W boson that explain the anomalies. We present a phenomenological study of parameter space allowed by the new experimental b → cτντ data and with the mono-tau signature pp → τ h X + MET at the LHC. For comparison, we include some of the W boson NP realizations that have already been studied in the literature.

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Section: Introductionmentioning

confidence: 99%

Charged current b→cτν¯τ anomalies in a general W′ boson scenario

2019

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“…that can be measured by LHCb and will provide an experimental consistency check of the anomaly. The current prediction reads [39] R(Λ c ) = R SM (Λ c )(1.15 ± 0.04) = 0.38 ± 0.01 ± 0.01 .…”

Section: The R(d ( * ) ) Anomalymentioning

confidence: 96%

“…While the latter has not been measured directly, upper bounds of 30% [60] and even 10% [61] have been put forward in the literature. A recent critical reassessment however showed that even values as large as 60% cannot be excluded at present [38,39].…”

Section: The R(d ( * ) ) Anomalymentioning

confidence: 97%

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Constraints on New Physics from B Mesons

Blanke¹

2019

Proceedings of XXIX International Symposium on Lepton Photon Interactions at High Energies — PoS(LeptonPhoton2019)

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“…To find the constrain on |y L 33 |, we utilize the 1D global fit value of Ref. [22] [11,24]. A detailed study with all three y R 12 (or y R 13 ), y R 23 , y L 23 non-vanishing couplings would be interesting in the light of new flavor and direct search results.…”

Section: Constraints On Leptoquark Yukawa Couplingsmentioning

confidence: 99%

Scalar leptoquark effects on $$B \rightarrow \mu \bar{\nu }$$ decay

2019

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Purely leptonic B meson decays provide unique probes for physics Beyond the Standard Model. We study the impact of a scalar leptoquark, S 1 , on B → μν decay. We find that, for m S 1 ∼ 1 TeV, the S 1 leptoquark can modify the B → μν rate significantly. Such a leptoquark can in principle also alter the B → τν rate. However, current searches from LHC and low energy physics provide some constraints on the parameter space.

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Addendum to “Impact of polarization observables and Bc→τν on new physics explanations of the b→

Cited by 120 publications

References 27 publications

Charged current b→cτν¯τ anomalies in a general W′ boson scenario

Charged current b→cτν¯τ anomalies in a general W′ boson scenario

Constraints on New Physics from B Mesons

Scalar leptoquark effects on $$B \rightarrow \mu \bar{\nu }$$ decay

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