8/3/2023 0 Comments Lepton flavors![]() Renormalizability and SM gauge invariance. Model-independent way via an effective Lagrangian, under the assumption of It is quite feasible to study the low-energy leptoquark phenomenology in a Finally, conclusions and outlook are presented in Sec. Section 4 is focused on the calculation of the LFV decayĪddition, we present the number of signal and background events produced at LHC, The constraints on the relevant model parameter space whose values will be used in Generalities of the LQ model that we are interested in Sec. The organization of our work is as follows. Which can be accommodated simultaneously with the muon ( g−2) and Into consideration updated data, including the electron ( g −2), However, the authors of the aforementioned works carry out fine-tuning in order toĮxplain the supposed excess, although nowadays it is ruled out. , whose branching ratios B R ( h → τ μ ) are of order O(1%) because an explanation for an apparent excess of the B R ( h → τ μ ) reported by the CMS and The spirit of our work was essentially studied also in the Refs. Furthermore, the non-chiral LQs interactions canĮnhance as well the rare LFV Higgs boson decay h → Muon anomalous magnetic moment ( ♚MDM) since they induce anĮnhancement by a factor m t /m µ ∼ O(10 3) or m b /m µ ∼ O(10) compared to the SM. The LQs with left and righthandedĬouplings to fermions are interesting candidates to explain the discrepancy of the Received considerable attention, and possible LQ manifestation in various processes Invoked to forbid the diquark couplings, otherwise the leptoquark masses areĮxpected to be at the Planck scale to ensure the stability of the proton. Violating interactions can mediate the proton decay unless an extra symmetry is ( B) and lepton ( L) number however, those with The LQs may or may not have well-defined baryon With R-parity violation, models withĬomposite fermions, etc. These particles also appear in otherĮxtensions of SM, such as Technicolor, supersymmetric models In the context of a SU(4) R × SU(4) L × SU(4 0) theory, where the lepton number isĬonsidered as a fourth color. LQsĬan be scalar or vector particles that simultaneously carry lepton and baryon numberĪnd can appear naturally in grand unified theories based on SO(10) In our research, we study the decay h → τµ in theįramework of a specific version of Leptoquark (LQ) models, as presented below. Integrated luminosity of up to 3 ab −1, 12 ab −1 and 30Īb −1 and center-of-mass energies of 14, 27 and 100 TeV, This could be achieved atįuture super hadron colliders, namely, High Luminosity LHC (HL-LHC), High Energy LHC (HE-LHC), and at Future hadron-hadron CircularĬollider (FCC-hh), which will reach an The one searched at the Large Hadron Collider (LHC). Τµ look promising with luminosities and energies larger than With these encouraging values, searches for the LFV decay h → ![]() The upper limits, at 95% confidence level, are: However, no significant excess over the SM expectation was Searches for the LFV decay h → τµ carried out byĬMS and ATLAS collaborations in the τµ and eτĬhannels were presented. Prediction, including the GIM-like suppression of this observable in the presence of Plethora of analysis in the context of several SM extensions, where theĪuthors of Ref. Studies on its detectability appeared soon after, which motivated a In addition to decays as l i → l j γ and l i → l j l k ¯ l k, particularly interesting is the decay h → SM extensions that predict sizable LFV effects that could be at the reach ofĭetection. Processes vanish at any order of perturbation theory, which encourages the study of Which motivated the occurrence of LFV in nature. The experiments with atmospheric, solar, reactor andĪccelerator neutrinos have provided evidence of this phenomenon , Neutrino oscillations are a consequence of their massive nature, which is notĪddressed by the SM. ![]() ![]() (LFV) ones, are predicted by many models of physics beyond SM. In this context, nonstandard Higgs couplings, including the Lepton Flavor Violating Several phenomenological studies on Higgs physics were proposed, from high precisionĮxperiments to processes that would indicate physics beyond the Standard Model (SM). Once the Higgs boson was discovered at LHC by ATLAS and CMS collaborations , ![]()
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