Rare semileptonic B→K(π)li−lj+ decay in a vector leptoquark model

Abstract

We investigate the consequence of vector leptoquarks on the rare semileptonic lepton flavour violating decays of B meson which are more promising and effective channels to probe the new physics signal. We constrain the resulting new leptoquark parameter space by using the branchingWe estimate the branching ratios of rare lepton flavour violating B → K(π)l − i l + j processes using the constrained leptoquark couplings.We also compute the forward-backward asymmetries and the lepton non-universality parameters of the LFV decays in the vector leptoquark model. Furthermore, we study the effect of vector leptoquark on (g − 2) µ anomaly.

RK and RK* beyond the standard model

“…Applied to leptoquark models this allows to select lepton speciesfor instance having only couplings to one lepton species, muons, or electrons [16]. Corrections to lepton isolation arise from rotations to the mass basis and at higher order in the spurion expansion, and induce lepton flavor violation [12,16,[27][28][29][30] such as B → Kµτ , which can be probed with B-physics experiments but also µ − econverison, rare K and → decays. Together with B → K ( * ) νν modes the latter constitute the leading constraints on flavor models and LNU anomalies, and improved experimental study is promising.…”

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

“…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.…”

R2 as a single leptoquark solution to RD(*Попов1, Schmidt2, White3 2019Phys. Rev. D691430View full textAdd to dashboardCite

“…The most common explanation for these anomalies is to extend the SM by leptoquarks (see Refs. [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] for a leptoquark solution to the R K ðÃÞ anomalies, Refs. [34,[39][40][41][42][43][44][45] for the R D ðÃÞ anomalies and Refs.…”