Measurements of the Absolute Branching Fractions of $B^\pm \to K^\pm X\_{c\bar c}$
- Resource Type
- Authors
- Guy Henri Maurice Wormser
- Source
- Nucl.Part.Phys.Proc.
22nd High-Energy Physics International Conference in Quantum Chromodynamics
22nd High-Energy Physics International Conference in Quantum Chromodynamics, Jul 2019, Montpellier, France. pp.152-157, ⟨10.1016/j.nuclphysbps.2019.11.026⟩
PoS
2019 European Physical Society Conference on High Energy Physics
2019 European Physical Society Conference on High Energy Physics, Jul 2019, Ghent, Belgium. pp.481, ⟨10.22323/1.364.0481⟩
- Subject
- X(3872) --> J/psi(3100) pi+ pi
J/psi(3100)
B+: branching ratio: measured
Analytical chemistry
X(3872): branching ratio: measured
electron positron: annihilation
Branching (polymer chemistry)
charmonium: electroproduction
X(3872)
quantum chromodynamics
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
X(3872): hadronic decay
High Energy Physics
talk: Montpellier 2019/07/02
Physics
Branching fraction
Resonance
electron positron: colliding beams
B-: hadronic decay
SLAC PEP Stor
QCD
talk: Ghent 2019/07/10
BaBar
B+: hadronic decay
B+ --> X(3872) K+
pi: pair production
Bar (unit)
experimental results
- Language
- English
International audience; A study of the two body decays B$^{+}\rightarrow X_{c\bar c}$K$^{+}$, where X$_{c\bar c}$ refers to one charmonium state, is reported by the BABAR experiment using a data sample of 424 fb$^{-1}$. The absolute determination of many branching fractions for these decays are significantly improved compared to previous BABAR measurements. Evidence is found at 3 $\sigma$ level for the decay B$^{+}\rightarrow X(3872)$K$^{+}$. The absolute branching fraction BR(B$^{+}\rightarrow X(3872)$K$^{+}$) = (2.1$\pm$0.6(stat)$\pm$0.3(syst))$\cdot$10$^{-4}$ is measured for the first time. From this, it follows that the branching fraction BR($X(3872)\\rightarrow J/\psi\pi^+\pi^-$) is equal to (4.1$\pm$1.3)\%, supporting the hypothesis of a molecular component for this resonance.