Abstract
We estimate contributions from Kaluza-Klein excitations of gauge bosons and physical charge scalar for the explanation of the lepton flavor universality violating excess in the ratios $\mathcal{R}(D)$ and $\mathcal{R}(D^*)$ in 5 dimensional Universal Extra Dimensional scenario with non-vanishing boundary localized terms. This model is conventionally known as non-minimal Universal Extra Dimensional model. We obtain the allowed parameter space in accordance with constraints coming from $B_c \to \tau \nu$ decay, as well as those from the electroweak precision tests.
Highlights
The Standard Model (SM) is to date the most successful model in explaining our understanding of the fundamental particles that are the building blocks of nature
We note that the latest LHCb data on RðDÃÞ is obtained by multiplying the particle data group (PDG) average values of appropriate branching fractions with the measured ratio KhadðDÃÞ 1⁄4 BrðB → DÃτνÞ/BrðB → DÃπππÞ
This is why we have even fitted for a case with this one data-point dropped and we note that inclusion of this point gives us a better fit of the data with our new physics coefficients
Summary
The Standard Model (SM) is to date the most successful model in explaining our understanding of the fundamental particles that are the building blocks of nature. The phenomenology of particle physics at this point of time is subject to precision tests for the SM, and on the lookout for observables that show a deviation from their SM predictions. These observables can be used as a probe for the favorable kind among the various NP models that exist in the literature. The significance of the deviation of these observables from SM can be used to rule out or constrain these available models, or even predict the type of NP that one can hope to probe
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