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oai:recercat.cat:20.500.14342/60632026-03-20T01:12:46Zcom_2072_482405com_2072_183628col_2072_482415

Amplitude analysis and branching fraction measurement of B+→D∗−Ds+π+ decays Calvo Gomez, Miriam Golobardes Ribé, Elisabet Vilasis-Cardona, Xavier LHCb Collaboration - CERN Universitat Ramon Llull. La Salle CERN Bone scintigraphy Decay processes Experimental nuclear physics Luminescene spectroscopy Nuclear chemistry Nuclear physics Gran col·lisionador d'hadrons (França i Suïssa) 539 54 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. info:eu-repo/semantics/publishedVersion 2024-08-21 info:eu-repo/semantics/article 1029-8479 https://hdl.handle.net/20.500.14342/6063 https://doi.org/10.1007/JHEP08(2024)165 eng Journal of High Energy Physics, 2024. 165 © CERN Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess 40 p. Springer