Abstract
The Bs0→Ds∓K± system offers a determination of the Unitarity Triangle angle γ . Intrigued by an LHCb analysis showing a surprisingly large result in tension with information on the Unitarity Triangle and other γ measurements, we make a transparent study of the measured observables, confirming the LHCb picture. The corresponding γ puzzle at the 3 σ level would require CP-violating contributions of New Physics, which should also manifest themselves in the corresponding decay branching ratios. Indeed, we find that the rates of the individual Bs0→Ds∓K± channels show puzzling patterns, in accordance with similar decays, with tensions up to 4.8 σ , thereby making the situation much more exciting. We present a formalism to include New-Physics effects in a model-independent way and apply it to the data to constrain the corresponding parameters. Interestingly, new contributions of moderate size could accommodate the data. Utilising this formalism in the future high-precision B physics era may allow us to finally establish new sources of CP violation.
Original language | English |
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Article number | 420 |
Pages (from-to) | 1-9 |
Number of pages | 9 |
Journal | European Physical Journal C |
Volume | 83 |
Issue number | 5 |
Early online date | 19 May 2023 |
DOIs | |
Publication status | Published - May 2023 |
Bibliographical note
Funding Information:We would like to thank Ruben Jaarsma, Philine van Vliet and Kristof De Bruyn for useful discussions. This research has been supported by the Netherlands Organisation for Scientific Research (NWO).
Publisher Copyright:
© 2023, The Author(s).
Funding
We would like to thank Ruben Jaarsma, Philine van Vliet and Kristof De Bruyn for useful discussions. This research has been supported by the Netherlands Organisation for Scientific Research (NWO).