Probing lepton flavor violating decays in MSSM with non-holomorphic soft terms

Abstract

The Minimal Supersymmetric Standard Model (MSSM) can be extended to include non-holomorphic trilinear soft supersymmetry (SUSY) breaking interactions that may have distinct signatures. We consider non-vanishing off-diagonal entries of the coupling matrices associated with holomorphic (of MSSM) and non-holomorphic trilinear terms corresponding to sleptons with elements A l ij and A l ij. We first improve the MSSM charge breaking minima condition of the vacuum to include the off-diagonal entries A l ij (with i = j). We further extend this analysis for non-holomorphic trilinear interactions. No other sources of lepton flavor violation like that from charged slepton matrices are considered. We constrain the interaction terms via the experimental limits of processes like charged leptons decaying with lepton flavor violation (LFV) and Higgs boson decaying to charged leptons with LFV. Apart from the leptonic decays we compute all the three neutral LFV Higgs boson decays of MSSM. We find that an analysis with non-vanishing A eµ involving the first two generations of sleptons receives the dominant constraint from µ → eγ. On the other hand, A eτ or A µτ can be constrained from the CMS 13 TeV analysis giving limits to the respective Yukawa couplings via considering SM Higgs boson decaying into eτ or µτ final states. Contributions from A l ij is too little to have any significance compared to the large effect from A l ij .

Lepton flavour violating $${\Lambda }_{{b}}$$ decays in non-universal $${Z}^{\prime }$$ model

“…In this paper we have studied this quark transition for lepton flavour violating decays of b baryon. To the best of our knowledge these LFV decays have not studied experimentally till now but some NP models have discussed [18][19][20][21][22][23][24][25][26][27][28][29][30]. Motivated by the results of Refs.…”

“…These decays previously explained with the effect of FCNC mediated Z boson [4,17], in non-universal Z model [18][19][20], in lepto-0123456789(). : V,-vol quark model [21][22][23][24], in MSSM [25][26][27] and other NP models [28] and also in model independent way [29]. In Ref.…”

Muon and Electron $(g-2)$ Anomalies with Non-Holomorphic Interactions in MSSM

“…In a hidden sector based supergravity type of model these interactions are typically suppressed by the scale of mediation [74]. Similar to the past analyses [66][67][68][69][70][71][72][73][80][81][82][83], in this work, without imposing any model-dependent restrictions, we treat such soft breaking at par with all the standard MSSM soft interactions 3 .…”

“…In contrast to the above analyses that had to manage the flavor issues carefully and are strongly constrained by µ → eγ or may have to live with light SUSY spectra or very large tan β, we focus on including nonstandard soft terms. Non-holomorphic trilinear terms may be augmented with MSSM leading to the so-called Non-holomorphic Supersymmetric Standard Model (NHSSM) [66][67][68][69][70][71][72][73][74]. The above terms are soft and may be included in a SUSY model if there is no gauge singlet.…”

“…Some of the early mentions/works may be seen in Refs. [74][75][76][77][78][79], whereas a number of phenomenological analyses may be seen here [66][67][68][69][70][71][72][73][80][81][82][83][84]. Our work would not demand any super large µ, or light spectra and we will use a flavor friendly scenario of identical slepton masses for the first two generations with equal coefficients for the left and right mass parameters.…”