Measurement of the Branching Fraction Ratios R(D^{+}) and R(D^{*+}) Using Muonic τ Decays
The branching fraction ratios of (B) over bar (0) -> D+tau(-)(v) over bar (tau) and (B) over bar (0) -> D*(+)tau(-)(v) over bar (tau) decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0 fb(-1) collected by the LHCb...
| Authors: | , , , |
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| Format: | article |
| Publication Date: | 2025 |
| Country: | España |
| Institution: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repository: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:20.500.14342/5852 |
| Online Access: | http://hdl.handle.net/20.500.14342/5852 https://doi.org/10.1103/PhysRevLett.134.061801 |
| Access Level: | Open access |
| Keyword: | Particle decays Bottom mesons Muons Tau leptons Flavor symetries Hadron colliders Particle data analysis Precision measurements Gran col·lisionador d'hadrons (França i Suïssa) 53 530.1 539 |
| Summary: | The branching fraction ratios of (B) over bar (0) -> D+tau(-)(v) over bar (tau) and (B) over bar (0) -> D*(+)tau(-)(v) over bar (tau) decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0 fb(-1) collected by the LHCb experiment in proton-proton collisions at root s = 13 TeV. The reconstructed final states are formed by combining D+ mesons with tau(-) -> mu(-) (v) over bar (mu)(v) over bar (tau) candidates, where the D+ is reconstructed via the D+ -> K- pi(+) pi(+) decay. The results are R(D+) = 0.249 +/- 0.043 +/- 0.047, R(D*(+)) = 0.402 +/- 0.081 +/- 0.085, where the first uncertainties are statistical and the second systematic. The two measurements have a correlation coefficient of -0.39 and are compatible with the standard model. |
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