Complete framework for tau polarimetry in B→D(*) τν decays
The meson decays B→Dτν and B→D∗τν are sensitive probes of the b→cτν transition. In this work, we present a complete framework to obtain the maximum information on the physics of B→D(*)τν with polarized τ leptons and unpolarized D(*) mesons. Focusing on the hadronic decays τ→πν and τ→ρν, we show how...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
30 November 2020
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| In: |
Physical review
Year: 2020, Volume: 102, Issue: 9 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.102.095028 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.102.095028 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.102.095028 
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| Author Notes: | Pouya Asadi, Anna Hallin, Jorge Martin Camalich, David Shih, and Susanne Westhoff |
| Summary: | The meson decays B→Dτν and B→D∗τν are sensitive probes of the b→cτν transition. In this work, we present a complete framework to obtain the maximum information on the physics of B→D(*)τν with polarized τ leptons and unpolarized D(*) mesons. Focusing on the hadronic decays τ→πν and τ→ρν, we show how to extract seven τ asymmetries from a fully differential analysis of the final-state kinematics. At Belle II with 50 ab−1 of data, these asymmetries could potentially be measured with percent-level statistical uncertainty. This would open a new window into possible new physics contributions in b→cτν and would allow us to decipher its Lorentz and gauge structure. |
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| Item Description: | Gesehen am 21.01.2021 |
| Physical Description: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.102.095028 |