StudyingW′ boson contributions in $\bar{B} \rightarrow {D}^{(* )}{{\ell }}^{-}{\bar{\nu }}_{{\ell }}$ decays within generalSU(2)1⨂SU(2)2⨂U(1)Xmodels

Wang, Yilong; Wei, Bin; Sheng, Jin-Huan; Wang, Rumin; Yang, Y.

doi:10.1088/1361-6471/aab10e

Cited by 2 publications

(1 citation statement)

References 62 publications

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“…The second simplified model we consider is a generalized sequential W model [58] with non-universal couplings in flavour space where the charged gauge boson W couples only to the third generation left-handed quarks and first two generation left-handed leptons. Such sequential W models have been recently studied in the context of anomalies in Bphysics [59][60][61][62][63]. Direct searches for such states typically look at couplings to only third generation quarks and leptons, so there are no such bounds these types of vectors that couple to third generation quarks and first or second generation leptons.…”

Section: Jhep08(2020)036mentioning

confidence: 99%

Constraining new physics with single top production at LHC

Stolarski

Tonero

2020

J. High Energ. Phys.

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We study effects of beyond the Standard Model physics coupling third generation quarks to leptons of the first two generations. We parametrize these effects by dimension-six effective operators, and we also consider related simplified UV completions: scalar leptoquark and W models. We derive new constraints on these scenarios by using recent ATLAS measurements of differential cross sections of single top production in association with a W boson, and also show how these limits will evolve with future data. We also describe how the limits can be significantly improved by using ratios of differential distributions with different flavours of leptons.

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Section: Jhep08(2020)036mentioning

confidence: 99%

Constraining new physics with single top production at LHC

Stolarski

Tonero

2020

J. High Energ. Phys.

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R -parity violating solutions to the RD(*) anomaly and t

Muramatsu

et al. 2019

Phys. Rev. D

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Recently, several B-physics experiments report interesting anomalies in the semileptonic decays of B-mesons, such as the excess in the R D ( * ) measurements. These anomalies seem to suggest intriguing hints of lepton flavor non-universality, and the R-parity violating (RPV) interactions are candidates for explaining this nonuniversality. In this paper, we discuss the RPV interactions for resolving the R D ( * ) anomaly with the Grand Unified Theory (GUT) assumption. To solve the R D ( * ) anomaly, it is known that large RPV couplings and around 1 TeV sfermion masses are required. At the same time, large RPV couplings are conducive to realize the bottom-tau Yukawa unification which appears in the GUT models. On the other hand, there are problems for realizing favorable sfermion masses in the constrained minimal supersymetric standard model. To resolve these problems, we show that two non-universalities, the non-universal sfermion masses and the non-universal gaugino masses, are favorable.Recently, several interesting anomalies in semi-leptonic B-meson decays are reported by the B-physics experiments. For example, the ratios of the branching fractions1) where l = e, µ, have been measured by the BaBar [1], Belle [2], and LHCb [3] collaborations and show large deviations from the Standard Model (SM) predictions. These ratios are ideal observables for testing the SM, especially the lepton flavor universality, because they are independent of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element V cb and are free from the experimental and theoretical uncertainties common to the numerator and the denominator. The most recent averages of the BaBar, Belle, and LHCb measurements, as compiled by the Heavy Flavor Averaging Group [4], read [5]

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StudyingW′ boson contributions in $\bar{B} \rightarrow {D}^{(* )}{{\ell }}^{-}{\bar{\nu }}_{{\ell }}$ decays within generalSU(2)₁⨂SU(2)₂⨂U(1)_Xmodels

Abstract: Recently, the Belle collaboration reported the first measurement of the τ lepton polarization P τ (D * ) in B D*t n 

Cited by 2 publications

References 62 publications

Constraining new physics with single top production at LHC

Constraining new physics with single top production at LHC

R -parity violating solutions to the RD(*) anomaly and t

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