The decay Λ0b → Λc+ p anti-p π− is observed using pp collision data collected with the LHCb detector at centre-of-mass energies of √s = 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb^−1. The ratio of branching fractions between Λ0b → Λc+ p anti-p π− and Λ0b → Λc+ π− decays is measured to be B(Λ0b → Λc+ p anti-p π−)/B( Λ0b → Λc+ π−) = 0.0540 ± 0.0023 ± 0.0032. Two resonant structures are observed in the Λc+ π− mass spectrum of the Λ0b → Λc+ p anti-p π− decays, corresponding to the Σc(2455)0 and Σc⁎(2520)0 states. The ratios of branching fractions with respect to the decay Λ0b → Λc+ p anti-p π− are B(Λ0b → Σ0c p anti-p) × B(Σ0c → Λc+ π−) / B(Λ0b → Λc+ p anti-p π−) = 0.089 ± 0.015 ± 0.006, B(Λ0b → Σc⁎0 p anti-p) × B(Σc⁎0 → Λc+ π−) B(Λ0b → Λc+ p anti-p π−) = 0.119 ± 0.020 ± 0.014. In all of the above results, the first uncertainty is statistical and the second is systematic. The phase space is also examined for the presence of dibaryon resonances. No evidence for such resonances is found.

Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albicocco, P., et al. (2018). Observation of the Decay Λ0b → Λc+ p anti-p π−. PHYSICS LETTERS. SECTION B, 784, 101-111 [10.1016/j.physletb.2018.07.033].

Observation of the Decay Λ0b → Λc+ p anti-p π−

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Marconi, U.;Patrignani, C.;Perazzini, S.;Pisani, F.;Vagnoni, V.;Zucchelli, S.
2018

Abstract

The decay Λ0b → Λc+ p anti-p π− is observed using pp collision data collected with the LHCb detector at centre-of-mass energies of √s = 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb^−1. The ratio of branching fractions between Λ0b → Λc+ p anti-p π− and Λ0b → Λc+ π− decays is measured to be B(Λ0b → Λc+ p anti-p π−)/B( Λ0b → Λc+ π−) = 0.0540 ± 0.0023 ± 0.0032. Two resonant structures are observed in the Λc+ π− mass spectrum of the Λ0b → Λc+ p anti-p π− decays, corresponding to the Σc(2455)0 and Σc⁎(2520)0 states. The ratios of branching fractions with respect to the decay Λ0b → Λc+ p anti-p π− are B(Λ0b → Σ0c p anti-p) × B(Σ0c → Λc+ π−) / B(Λ0b → Λc+ p anti-p π−) = 0.089 ± 0.015 ± 0.006, B(Λ0b → Σc⁎0 p anti-p) × B(Σc⁎0 → Λc+ π−) B(Λ0b → Λc+ p anti-p π−) = 0.119 ± 0.020 ± 0.014. In all of the above results, the first uncertainty is statistical and the second is systematic. The phase space is also examined for the presence of dibaryon resonances. No evidence for such resonances is found.
2018
Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., Albicocco, P., et al. (2018). Observation of the Decay Λ0b → Λc+ p anti-p π−. PHYSICS LETTERS. SECTION B, 784, 101-111 [10.1016/j.physletb.2018.07.033].
Aaij, R.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.; Ali, S.; Alkh...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/640689
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