Amplitude analysis and branching fraction measurement of $$ {B}^{+}\to {D}^{\ast -}{D}_s^{+}{\pi}^{+} $$ decays


Aaij, R, Abdelmotteleb, ASW, Abellan Beteta, C, Abudinén, F, Ackernley, T, Adams, JA, Adefisoye, AA, Adeva, B, Adinolfi, M, Adlarson, P et al (show 1069 more authors) (2024) Amplitude analysis and branching fraction measurement of $$ {B}^{+}\to {D}^{\ast -}{D}_s^{+}{\pi}^{+} $$ decays Journal of High Energy Physics, 2024 (8). 165-. ISSN 1126-6708, 1029-8479

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Abstract

Abstract The decays of the B + meson to the final state $$ {D}^{\ast -}{D}_s^{+}{\pi}^{+} $$ D ∗ − D s + 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 $$ {B}^{+}\to {D}^{\ast -}{D}_s^{+}{\pi}^{+} $$ B + → D ∗ − D s + π + and $$ {B}^0\to {D}^{\ast -}{D}_s^{+} $$ B 0 → D ∗ − D s + 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 $$ {D}_s^{\ast +}\to {D}_s^{+}\gamma $$ D s ∗ + → D s + γ and $$ {D}_s^{+}{\pi}^0 $$ D s + π 0 decays, the ratio of branching fractions between the $$ {B}^{+}\to {D}^{\ast -}{D}_s^{\ast +}{\pi}^{+} $$ B + → D ∗ − D s ∗ + π + and $$ {B}^{+}\to {D}^{\ast -}{D}_s^{+}{\pi}^{+} $$ B + → D ∗ − D s + π + decays is determined as 1.31 ± 0.07 ± 0.14. An amplitude analysis of the $$ {B}^{+}\to {D}^{\ast -}{D}_s^{+}{\pi}^{+} $$ B + → D ∗ − D s + 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 $$ {D}_s^{+}{\pi}^{+} $$ D s + π + or $$ {D}^{\ast -}{D}_s^{+} $$ D ∗ − D s + channels is found. The fit fraction of the scalar state $$ {T}_{c\overline{s}0}^{\ast }{(2900)}^{++} $$ T c s ¯ 0 ∗ 2900 + + observed in the $$ {B}^{+}\to {D}^{-}{D}_s^{+}{\pi}^{+} $$ B + → D − D s + π + decay is determined to be less than 2.3% at a 90% confidence level.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 4902 Mathematical Physics, 49 Mathematical Sciences, 51 Physical Sciences, Intellectual and Developmental Disabilities (IDD), Down Syndrome, Brain Disorders
Divisions: Faculty of Science & Engineering
Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 30 Sep 2024 07:34
Last Modified: 13 Dec 2025 21:58
DOI: 10.1007/jhep08(2024)165
Open Access URL: https://link.springer.com/content/pdf/10.1007/JHEP...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3184782
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