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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/222009
Amplitude analysis and branching fraction measurement of B+ → D∗−D+ s π + decays
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The decays of the B+ meson to the fnal state D∗−D+ s π + are studied in protonproton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb−1 . The ratio of branching fractions of the B+ → D∗−D+ s π + and B0 → D∗−D+ s decays is measured to be 0.173 ± 0.006 ± 0.010, where the frst uncertainty is statistical and the second is systematic. Using partially reconstructed D∗+ s → D+ s γ and D+ s π 0 decays, the ratio of branching fractions between the B+ → D∗−D∗+ s π + and B+ → D∗−D+ s π + decays is determined as 1.31 ± 0.07 ± 0.14. An amplitude analysis of the B+ → D∗−D+ s π + decay is performed for the frst time, revealing dominant contributions from known excited charm resonances decaying to the D∗−π + fnal state. No signifcant evidence of exotic contributions in the D+ s π + or D∗−D+ s channels is found. The ft fraction of the scalar state T ∗ cs¯0 (2900)++ observed in the B+ → D−D+ s π + decay is determined to be less than 2.3% at a 90% confdence level.
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COMERMA MONTELLS, Albert, GARCIA MORENO, Paula, GARRIDO BELTRÁN, Lluís, GIOVENTÙ, Alessandra, GIRONELLA GIRONELL, Pere, GOMEZ FERNANDEZ, Sergio, GRAUGÉS POUS, Eugeni, LOBO SALVIA, Aniol, LÓPEZ HUERTAS, Albert, MANERA ESCALERO, Rafel, MARIN BENITO, Carla, MAURICIO FERRE, Joan, CALEFICE, Lukas, VAZQUEZ GOMEZ, Ricardo, LHCb Collaboration. Amplitude analysis and branching fraction measurement of B+ → D∗−D+ s π + decays. _Journal of High Energy Physics_. 2024. Vol. 2024, núm. 165. [consulta: 25 de febrer de 2026]. ISSN: 1126-6708. [Disponible a: https://hdl.handle.net/2445/222009]