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Abstract: The decays Λb0→ ψ(2S)pK−and Λb0→ J/ψπ+π−pK−are observed in a data sample corresponding to an integrated luminosity of 3 fb−1, collected in proton-proton collisions at 7 and 8 TeV centre-of-mass energies by the LHCb detector. The ψ(2S) mesons are reconstructed through the decay modes ψ(2S) → μ+μ−and ψ(2S) → J/ψπ+π−. The branching fractions relative to that of Λb0→ J/ψpK−are measured to beℬ(Λb0→ψ(2S)pK−)/ℬ(Λb0→J/ψpK−)=(20.70±0.76±0.46±0.37)×10−2, ℬ(Λb0→ψ(2S)pK−)/ℬ(Λb0→J/ψpK−)=(20.86±0.96±1.34)×10−2 where the first uncertainties are statistical, the second are systematic and the third is related to the knowledge of J/ψ and ψ(2S) branching fractions. The mass of the Λb0baryon is measured to be M(Λb0)=5619.65±0.17±0.17MeV/c2, where the uncertainties are statistical and systematic.
Observation of Λb0→ ψ(2S)pK−and Λb0→ J/ψπ+π−pK−decays and a measurement of the Λb0baryon mass / The Lhcb, C., Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2016:5(2016), pp. N/A-N/A. [10.1007/JHEP05(2016)132]
Observation of Λb0→ ψ(2S)pK−and Λb0→ J/ψπ+π−pK−decays and a measurement of the Λb0baryon mass
Abstract: The decays Λb0→ ψ(2S)pK−and Λb0→ J/ψπ+π−pK−are observed in a data sample corresponding to an integrated luminosity of 3 fb−1, collected in proton-proton collisions at 7 and 8 TeV centre-of-mass energies by the LHCb detector. The ψ(2S) mesons are reconstructed through the decay modes ψ(2S) → μ+μ−and ψ(2S) → J/ψπ+π−. The branching fractions relative to that of Λb0→ J/ψpK−are measured to beℬ(Λb0→ψ(2S)pK−)/ℬ(Λb0→J/ψpK−)=(20.70±0.76±0.46±0.37)×10−2, ℬ(Λb0→ψ(2S)pK−)/ℬ(Λb0→J/ψpK−)=(20.86±0.96±1.34)×10−2 where the first uncertainties are statistical, the second are systematic and the third is related to the knowledge of J/ψ and ψ(2S) branching fractions. The mass of the Λb0baryon is measured to be M(Λb0)=5619.65±0.17±0.17MeV/c2, where the uncertainties are statistical and systematic.
B physics; Flavor physics; Hadron-Hadron scattering (experiments); Particle and resonance production; Spectroscopy
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Observation of Λb0→ ψ(2S)pK−and Λb0→ J/ψπ+π−pK−decays and a measurement of the Λb0baryon mass / The Lhcb, C., Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2016:5(2016), pp. N/A-N/A. [10.1007/JHEP05(2016)132]
Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1210202
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