First observations of the decays Λ0b → Λc+ D(s)− are reported using data corresponding to an integrated luminosity of 3 fb^−1 collected at 7 and 8 TeV center-of-mass energies in proton-proton collisions with the LHCb detector. In addition, the most precise measurement of the branching fraction B(B0s → D+ Ds−) is made and a search is performed for the decays B0(s) → Λc+ Λc−. The results obtained are B(Λ0b → Λc+ D−)/B(Λ0b → Λc+ Ds−) = 0.042 ± 0.003(stat) ± 0.003(syst), [B(Λ0b → Λc+ Ds−)/B(anti-B0 → D+ Ds−)] / [B(Λ0b → Λc+ π−)/B(anti-B0 → D+ π−)] = 0.96 ± 0.02(stat) ± 0.06(syst), B(B0s → D+ Ds−)/B(anti-B0 → D+ Ds−) = 0.038 ± 0.004(stat) ± 0.003(syst), B(anti-B0 → Λc+ Λc−)/B(anti-B0 → D+ Ds−) < 0.0022 [95% C.L.], B(B0s → Λc+ Λc−)/B(B0s → D+ Ds−) < 0.30 [95% C.L.]. Measurement of the mass of the Λ0b baryon relative to the anti-B0 meson gives M(Λ0b) − M(anti-B0) = 339.72 ± 0.24(stat) ± 0.18(syst) MeV/c2. This result provides the most precise measurement of the mass of the Λ0b baryon to date.

R. Aaij, A. Abba, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, et al. (2014). Study of Beauty Hadron Decays into Pairs of Charm Hadrons. PHYSICAL REVIEW LETTERS, 112(20), 1-9 [10.1103/PhysRevLett.112.202001].

Study of Beauty Hadron Decays into Pairs of Charm Hadrons

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2014

Abstract

First observations of the decays Λ0b → Λc+ D(s)− are reported using data corresponding to an integrated luminosity of 3 fb^−1 collected at 7 and 8 TeV center-of-mass energies in proton-proton collisions with the LHCb detector. In addition, the most precise measurement of the branching fraction B(B0s → D+ Ds−) is made and a search is performed for the decays B0(s) → Λc+ Λc−. The results obtained are B(Λ0b → Λc+ D−)/B(Λ0b → Λc+ Ds−) = 0.042 ± 0.003(stat) ± 0.003(syst), [B(Λ0b → Λc+ Ds−)/B(anti-B0 → D+ Ds−)] / [B(Λ0b → Λc+ π−)/B(anti-B0 → D+ π−)] = 0.96 ± 0.02(stat) ± 0.06(syst), B(B0s → D+ Ds−)/B(anti-B0 → D+ Ds−) = 0.038 ± 0.004(stat) ± 0.003(syst), B(anti-B0 → Λc+ Λc−)/B(anti-B0 → D+ Ds−) < 0.0022 [95% C.L.], B(B0s → Λc+ Λc−)/B(B0s → D+ Ds−) < 0.30 [95% C.L.]. Measurement of the mass of the Λ0b baryon relative to the anti-B0 meson gives M(Λ0b) − M(anti-B0) = 339.72 ± 0.24(stat) ± 0.18(syst) MeV/c2. This result provides the most precise measurement of the mass of the Λ0b baryon to date.
2014
R. Aaij, A. Abba, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, et al. (2014). Study of Beauty Hadron Decays into Pairs of Charm Hadrons. PHYSICAL REVIEW LETTERS, 112(20), 1-9 [10.1103/PhysRevLett.112.202001].
R. Aaij; A. Abba; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/289314
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