The first observation of the B+ c →J/ψπ+π0 decay is reported with high signifi- cance using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1 , collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13TeV. The ratio of its branching fraction relative to the B+ c →J/ψπ+ channel is measured to be BB+ c →J/ψπ+π0 = 2.80 ±0.15 ±0.11 ±0.16 , BB+ c →J/ψπ+ where the first uncertainty is statistical, the second systematic and the third related to imprecise knowledge of the branching fractions for B+ →J/ψK∗+ and B+ c →J/ψπ+ decays, which are used to determine the π0 detection efficiency. The π+π0 mass spectrum is found to be consistent with the dominance of an intermediate ρ+ contribution in accordance with a model based on QCD factorisation.

Observation of the $$ {B}_c^{+}\to J/\psi {\pi}^{+}{\pi}^0 $$ decay / Null, N., Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adams, J.A., Adefisoye, A.A., Adeva, B., Adinolfi, M., Adlarson, P., Agapopoulou, C., Aidala, C.A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2024:4(2024). [10.1007/jhep04(2024)151]

Observation of the $$ {B}_c^{+}\to J/\psi {\pi}^{+}{\pi}^0 $$ decay

Casse, G.;Sarti, A.;
2024

Abstract

The first observation of the B+ c →J/ψπ+π0 decay is reported with high signifi- cance using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1 , collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13TeV. The ratio of its branching fraction relative to the B+ c →J/ψπ+ channel is measured to be BB+ c →J/ψπ+π0 = 2.80 ±0.15 ±0.11 ±0.16 , BB+ c →J/ψπ+ where the first uncertainty is statistical, the second systematic and the third related to imprecise knowledge of the branching fractions for B+ →J/ψK∗+ and B+ c →J/ψπ+ decays, which are used to determine the π0 detection efficiency. The π+π0 mass spectrum is found to be consistent with the dominance of an intermediate ρ+ contribution in accordance with a model based on QCD factorisation.
2024
B Physics, Branching fraction, Charm Physics, Hadron-Hadron Scattering
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of the $$ {B}_c^{+}\to J/\psi {\pi}^{+}{\pi}^0 $$ decay / Null, N., Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adams, J.A., Adefisoye, A.A., Adeva, B., Adinolfi, M., Adlarson, P., Agapopoulou, C., Aidala, C.A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2024:4(2024). [10.1007/jhep04(2024)151]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1720325
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