Abstract
We analyze, in a fully model-independent manner, the effects of new physics on a few semi-hadronic three-body meson decays of the type $P_i \to P_f f_1 f_2$, where $P_i$, $P_f$ are well chosen pseudo-scalar mesons and $f_{1,2}$ denote fermions out of which at least one gets detected in experiments. We find that the angular distribution of events of these decays can probe many interesting new physics, such as the nature of the intermediate particle that can cause lepton-flavor violation, or presence of heavy sterile neutrino, or new intermediate particles, or new interactions. We also provide angular asymmetries which can quantify the effects of new physics in these decays. We illustrate the effectiveness of our proposed methodology with a few well chosen decay modes showing effects of certain new physics possibilities without any hadronic uncertainties.
Highlights
New physics (NP), or physics beyond the standard model, involves various models that extend the well verified standard model (SM) of particle physics by introducing a number of new particles with novel properties and interactions
We find that the angular distribution of events of these decays can probe many interesting new physics, such as the nature of the intermediate particle that can cause lepton-flavor violation or presence of heavy sterile neutrino or new intermediate particles or new interactions
The presence of new interactions, or new particles such as fermionic dark matter (DM) particles or heavy sterile neutrinos or long-lived particles (LLP) would leave their signature in the angular distribution, and we show by example how new physics contributions can be quantified from angular asymmetries
Summary
New physics (NP), or physics beyond the standard model, involves various models that extend the well verified standard model (SM) of particle physics by introducing a number of new particles with novel properties and interactions. Recent experimental studies in B meson decays, such as B → KðÃÞl−lþ [1], Bs → φl−lþ [2], B → DðÃÞlν [3], and Bc → J=ψlν [4] (where l can be e, μ, or τ) have reported anomalous observations raising the expectation of discovery of new physics with more statistical significance. VA, we present a classification of all of the decay modes under our consideration This is followed by a systematic discussion of the effects of new physics on the angular distribution in certain well chosen examples, in Secs. VI, we conclude by highlighting the important aspects of our methodology and its possible experimental realization
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