Abstract
There is growing evidence for deviation from the standard model predictions in the ratios between semitauonic and semileptonic B decays, known as the R(D(∗)) puzzle. If the source of this nonuniversality is new physics, it is natural to assume that it also breaks CP symmetry. In this paper we study the possibility of measuring CP violation in semitauonic B decays, exploiting interference between excited charm mesons. Given the current values of R(D(∗)), we find that our proposed CP-violation observable could be as large as about 10%. We discuss the experimental advantages of our method and propose carrying it out at Belle II and LHCb.
| Original language | English |
|---|---|
| Article number | 035022 |
| Journal | Physical Review D |
| Volume | 98 |
| Issue number | 3 |
| DOIs | |
| State | Published - 1 Aug 2018 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2018 authors. Published by the American Physical Society.
Funding
We thank Diptimoy Ghosh, Yosef Nir and Zoltan Ligeti for useful discussions. This research is supported in part by the United States-Israel Binational Science Foundation (BSF), Jerusalem, Israel (Grants No. 2014230 and No. 2016113). Y. G. is supported in part by the NSF Grant No. PHY-1316222. We thank Diptimoy Ghosh, Yosef Nir and Zoltan Ligeti for useful discussions. This research is supported in part by the United States-Israel Binational Science Foundation (BSF), Jerusalem, Israel (Grants No. 2014230 and No. 2016113). Y.G. is supported in part by the NSF Grant No. PHY-1316222.
| Funders | Funder number |
|---|---|
| National Science Foundation | |
| United States-Israel Binational Science Foundation | 2014230, 2016113 |
| Norsk Sykepleierforbund | PHY-1316222 |