arXiv Analytics

Sign in

arXiv:1903.10486 [hep-ph]AbstractReferencesReviewsResources

Impact of $D^*$ polarization measurement on solutions to $R_D$-$R_{D^*}$ anomalies

Ashutosh Kumar Alok, Dinesh Kumar, Suman Kumbhakar, S Uma Sankar

Published 2019-03-25Version 1

The anomalies in the flavor ratios $R_D$ and $R_{D^*}$ provide a hint of physics beyond the Standard Model. Previously it was shown that the polarization fraction of the $D^*$ meson in the $B\rightarrow D^*\,\tau\,\bar{\nu}$ decay provides a defining signature for tensor new physics. Recent measurement of this quantity by the Belle collaboration completely rules out the tensor new physics solution (at better than $5\sigma$). Here we do a re-analysis of all the data in $b\rightarrow c\,\tau\,\bar{\nu}$ sector, including the $D^*$ polarization fraction. We identify the allowed new physics solutions and the six variables needed to distinguish between them.

Related articles: Most relevant | Search more
arXiv:2305.03885 [hep-ph] (Published 2023-05-06)
$φ(2170)$ decaying to $φη$ and $φη^\prime$
arXiv:hep-ph/9810541 (Published 1998-10-30)
Some aspects of the Standard Model in gravitational backgrounds with torsion
arXiv:hep-ph/9907456 (Published 1999-07-22, updated 1999-10-01)
Momentum-Space Topology of Standard Model