The decays of the B+ meson to the final state D*− Ds+ π+ are studied in proton-proton 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*− Ds+ π+ and B0 → D*− Ds+ decays is measured to be 0.173 ± 0.006 ± 0.010, where the first uncertainty is statistical and the second is systematic. Using partially reconstructed Ds*+ → Ds+ γ and Ds+ π0 decays, the ratio of branching fractions between the B+ → D*− Ds*+ π+ and B+ → D*− Ds+ π+ decays is determined as 1.31 ± 0.07 ± 0.14. An amplitude analysis of the B+ → D*− Ds+ π+ decay is performed for the first time, revealing dominant contributions from known excited charm resonances decaying to the D*− π+ final state. No significant evidence of exotic contributions in the Ds+ π+ or D*− Ds+ channels is found. The fit fraction of the scalar state T*_{c anti-s 0}(2900)++ observed in the B+ → D− Ds+ π+ decay is determined to be less than 2.3% at a 90% confidence level.

Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adams, J.A., et al. (2024). Amplitude analysis and branching fraction measurement of B+ → D*− Ds+ π+ decays. JOURNAL OF HIGH ENERGY PHYSICS, 2024(8), 0-39 [10.1007/jhep08(2024)165].

Amplitude analysis and branching fraction measurement of B+ → D*− Ds+ π+ decays

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;
2024

Abstract

The decays of the B+ meson to the final state D*− Ds+ π+ are studied in proton-proton 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*− Ds+ π+ and B0 → D*− Ds+ decays is measured to be 0.173 ± 0.006 ± 0.010, where the first uncertainty is statistical and the second is systematic. Using partially reconstructed Ds*+ → Ds+ γ and Ds+ π0 decays, the ratio of branching fractions between the B+ → D*− Ds*+ π+ and B+ → D*− Ds+ π+ decays is determined as 1.31 ± 0.07 ± 0.14. An amplitude analysis of the B+ → D*− Ds+ π+ decay is performed for the first time, revealing dominant contributions from known excited charm resonances decaying to the D*− π+ final state. No significant evidence of exotic contributions in the Ds+ π+ or D*− Ds+ channels is found. The fit fraction of the scalar state T*_{c anti-s 0}(2900)++ observed in the B+ → D− Ds+ π+ decay is determined to be less than 2.3% at a 90% confidence level.
2024
Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adams, J.A., et al. (2024). Amplitude analysis and branching fraction measurement of B+ → D*− Ds+ π+ decays. JOURNAL OF HIGH ENERGY PHYSICS, 2024(8), 0-39 [10.1007/jhep08(2024)165].
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adams, J. A.; Adefisoye, A. A.; Adeva, B.; Adinolfi, M.; Adlarson,...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1006089
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