Measurement of branching fraction and search for CPCP violation in BϕϕKB\to \phi \phi K

Collaboration
Jan 19, 2021
9 pages
Published in:
  • Phys.Rev.D 103 (2021) 5, 052013
  • Published: Mar 30, 2021
e-Print:
Report number:
  • Belle Preprint 2020-20,
  • KEK Preprint 2020-37
Experiments:

Citations per year

0 Citations
Abstract: (APS)
We report the measurement of branching fractions and CP-violation asymmetries in B→ϕϕK decays based on a 711  fb-1 data sample containing 772×106  BB¯ events. The data were recorded at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. For B+→ϕϕK+, the branching fraction and CP-violation asymmetry measured below the ηc threshold (mϕϕ<2.85  GeV/c2) are [3.43-0.46+0.48(stat)±0.22(syst)]×10-6 and -0.02±0.11(stat)±0.01(syst), respectively. Similarly, the branching fraction obtained for B0→ϕϕK0 below the ηc threshold is [3.02-0.66+0.75(stat)±0.20(syst)]×10-6. We also measure the CP-violation asymmetry for B+→ϕϕK+ within the ηc region (mϕϕ∈[2.94,3.02]  GeV/c2) to be +0.12±0.12(stat)±0.01(syst).
Note:
  • 8 pages, 6 figures, 4 tables, submitted to Phys. Rev. D
  • Particle Physics Experiments
  • electron positron: annihilation
  • electron positron: colliding beams
  • B: pair production
  • B: hadronic decay
  • Phi(1020): pair production
  • decay: asymmetry: measured
  • branching ratio
  • Upsilon(10570): electroproduction
  • CP: violation