Giuliano Mion

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

Brundu D.;Contu A.;De Angelis C.;Dettori F.;Dordei F.;Fabiano F.;Litvinov R.;Manca G.;Oldeman R.;Saitta B.;Sun J.;
2024-01-01

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 Tcs¯0∗2900++ observed in the B+→D−Ds+π+ decay is determined to be less than 2.3% at a 90% confidence level.
2024
Inglese
2024
8
165
40
https://link.springer.com/article/10.1007/JHEP08(2024)165
Esperti anonimi
scientifica
Branching fraction
Charm Physics
Hadron-Hadron Scattering
Spectroscopy
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinen, F.; Ackernley, T.; Adams, J. A.; Adefisoye, A. A.; Adeva, B.; Adinolfi, M.; Adlarson, ...espandi
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
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open
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