Measurements of the Absolute Branching Fractions of B±→K±Xcc¯
General Physics
:Kjerne- og elementærpartikkelfysikk: 431 [VDP]
BABAR
BaBar; PEP-II; B meson; Bottom mesons;
B decays; charmonium physics; inclusive measurements
B meson
Hadrons
530
PARTICLE PHYSICS; PEP2; BABAR
01 natural sciences
Mathematical Sciences
DECAYS
Atomic physics
Engineering
0103 physical sciences
PEP2
Fraccions
Baryons
Fractions
Barions
Elementary particles; Absolute branching fractions; Charmonium; Two-body decays; High energy physics;
hep-ex
Particle physics
VDP::Kjerne- og elementærpartikkelfysikk: 431
HEP; BaBar
Bottom meson
B mesons; meson hadronic decay; X mesons
BABAR Collaboration
:Nuclear and elementary particle physics: 431 [VDP]
VDP::Nuclear and elementary particle physics: 431
BaBar Collaboration
Physical Sciences
BaBar
PEP-II
PARTICLE PHYSICS
babar; slac; branching ratio
Física de partícules
Experiments
DOI:
10.1103/physrevlett.124.152001
Publication Date:
2020-04-16T16:27:42Z
AUTHORS (240)
ABSTRACT
A study of the two-body decays B^{±}→X_{cc[over ¯]}K^{±}, where X_{cc[over ¯]} refers to one charmonium state, is reported by the BABAR Collaboration using a data sample of 424 fb^{-1}. The absolute determination of branching fractions for these decays are significantly improved compared to previous BABAR measurements. Evidence is found for the decay B^{+}→X(3872)K^{+} at the 3σ level. The absolute branching fraction B[B^{+}→X(3872)K^{+}]=[2.1±0.6(stat)±0.3(syst)]×10^{-4} is measured for the first time. It follows that B[X(3872)→J/ψπ^{+}π^{-}]=(4.1±1.3)%, supporting the hypothesis of a molecular component for this resonance.
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