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We constrain the parameters of a representative new physics model withpossible dark matter (DM) signature from a global CKM fit analysis. The modelhas neutral quark current interactions mediated by a scalar, impacting thesemileptonic and purely leptonic meson decays at one-loop. We take thisopportunity to update the fit results for the Wolfenstein parameters and theCKM elements with and without a contribution from the new model using severalother updated inputs. Alongside, we have analyzed and included in the CKM fitthe $B\to D^*\ell\nu_{\ell}$ decay. The newly available inputs on the relevantform factors from lattice are included, and the possibility of new physicseffects in $B\to D^*\ell\nu_{\ell}$ is considered. We obtain tight constraintson the relevant new physics parameters. We have studied the possibleimplications of this constraint on DM phenomenology. Apart from DM, the boundsare also applicable in other relevant phenomenological studies.

Constraining New Physics with Possible Dark Matter Signatures from a Global CKM Fit