Flavor anomalies at the LHC and theR-parity violating supersymmetric model extended with vectorlike particles

Abstract

In this paper, we consider a solution to explain the three discrepancies with the standard model (SM) predictions in flavor observables, i.e. anomalies in B → K * µ + µ − and R K = B(B → Kµ + µ − )/B(B → Ke + e − ) at the LHCb and an excess in h → µτ at the CMS in the context of R-parity violating (RPV) supersymmetry. We demonstrate that these anomalies can be explained within a unified framework: the minimal supersymmetry model (MSSM) extended with 5 + 5 vectorlike (VL) particles. The new trilinear RPV couplings involving VL particles in our model can solve the b → s anomalies , and the mixing between the SM-like Higgs boson and the VL sneutrino can yield the extra h → µτ decay mode.

Higgs Lepton Flavor Violating Decays in Two Higgs Doublet Models

“…This was studied in relation to the LFV decay h → τ µ in [9,19,34,47,53,70,76,130], and very recently in [134,135]. It could also be linked to the popular b → s [31,48] or b → c [42] anomalies observed in B-meson decays or be a crucial ingredient for lepton-flavored electroweak baryogenesis [80]. In fact, the type-III 2HDM with generic Yukawa couplings has a very rich flavor phenomenology, see [130].…”

Flavor and Lepton Universality Violation Phenomena in F-Theory Inspired GUTs

“…In these type of models, since the MSSM families appear with universal charges strong bounds from flavor violation processes can be evaded, while at the same time it is possible to explain the observed B meson anomalies through mixing effects of the VL exotics with the three MSSM chiral families. At the same time, RPV terms involving VL exotics which usually appear in these type of models, is an additional source of contributions in to b → s observables [39]- [43].…”

SU(5) × U(1)′ Models with a Vector-like Fermion Family

“…A remarkable observation is that particular R-parity violating (RPV) terms, such as λ ijk L i Q j d c k , could explain the anomalies related to the b → s flavor-violating process [26][27][28][29]. In this section, we look for possible R-parity violating terms (RPV) in the tree-level superpotential (dubbed here W RPV tree ) for the models A, B, C, D, E presented in Table 3 and briefly discuss their consequences.…”

“…In Section 4 of [32], there are examples of how this R-parity can be built. On the other hand, provided certain restrictions and conditions are fulfilled [26], such couplings may contribute to the B-meson anomalies and other interesting effects, such as the (g − 2) µ anomaly [35,36], without exceeding baryon and/or lepton number violating bounds.…”