Searches for the rare hadronic decays B0→pp¯pp¯ and Bs0→pp¯pp¯ are performed using proton-proton collision data recorded by the LHCb experiment and corresponding to an integrated luminosity of 9 fb-1. Significances of 9.3σ and 4.0σ, including statistical and systematic uncertainties, are obtained for the B0→pp¯pp¯ and Bs0→pp¯pp¯ signals, respectively. The branching fractions are measured relative to the topologically similar normalization decays B0→J/ψ(→pp¯)K∗0(→K+π-) and Bs0→J/ψ(→pp¯)⁢φ(→K+K-). The branching fractions are measured to be B(B0→pp¯pp¯)=(2.2±0.4±0.1±0.1)×10-8 and B(Bs0→pp¯pp¯)=(2.3±1.0±0.2±0.1)×10-8. In these measurements, the first uncertainty is statistical, the second is systematic, and the third one is due to the external branching fraction of the normalization channel.

Measurement of the Branching Fractions ℬ⁡(𝐵0 →𝑝⁢¯𝑝𝑝⁢¯𝑝) and ℬ⁡(𝐵0𝑠→𝑝⁢¯𝑝𝑝⁢¯𝑝)

Lusiani, A.
Membro del Collaboration Group
;
Morello, M.  J.;
2023

Abstract

Searches for the rare hadronic decays B0→pp¯pp¯ and Bs0→pp¯pp¯ are performed using proton-proton collision data recorded by the LHCb experiment and corresponding to an integrated luminosity of 9 fb-1. Significances of 9.3σ and 4.0σ, including statistical and systematic uncertainties, are obtained for the B0→pp¯pp¯ and Bs0→pp¯pp¯ signals, respectively. The branching fractions are measured relative to the topologically similar normalization decays B0→J/ψ(→pp¯)K∗0(→K+π-) and Bs0→J/ψ(→pp¯)⁢φ(→K+K-). The branching fractions are measured to be B(B0→pp¯pp¯)=(2.2±0.4±0.1±0.1)×10-8 and B(Bs0→pp¯pp¯)=(2.3±1.0±0.2±0.1)×10-8. In these measurements, the first uncertainty is statistical, the second is systematic, and the third one is due to the external branching fraction of the normalization channel.
2023
Settore FIS/01 - Fisica Sperimentale
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
effective field theory; particle decays; particle detection signatures; particle interactions; uncertainty analysis; branching fractions; hadronic decays; integrated luminosity
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/149933
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