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Related Experiment Videos

Observation of B(0)-->D((*)0)pp.

K Abe1, K Abe, R Abe

  • 1High Energy Accelerator Research Organization (KEK), Tsukuba.

Physical Review Letters
|October 9, 2002
PubMed

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Summary

Researchers observed new B meson decay modes, B;(0)-->D(0)pp; and B;(0)-->D(*0)pp;, for the first time. These findings provide crucial insights into B meson physics and particle interactions.

Area of Science:

  • Particle Physics
  • High-Energy Physics
  • Quantum Chromodynamics

Background:

  • B mesons are subatomic particles crucial for understanding the Standard Model.
  • Studying B meson decays provides insights into fundamental forces and particle properties.

Purpose of the Study:

  • To investigate B meson decay modes B-->Dpp and B-->D(*)pp.
  • To observe and measure the branching fractions of these decays.
  • To set limits on decay modes where no signal is observed.

Main Methods:

  • Analysis of 29.4 fb(-1) of data collected by the Belle detector at KEKB.
  • Identification and reconstruction of B meson decay products.
  • Statistical analysis to determine significance and branching fractions.

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Main Results:

  • First-time observation of B;(0)-->D(0)pp; decays with a branching fraction of (1.18+/-0.15+/-0.16)x10(-4).
  • First-time observation of B;(0)-->D(*0)pp; decays with a branching fraction of (1.20(+0.33)(-0.29)+/-0.21)x10(-4).
  • No significant signal observed for B+-->D(+)pp; and B+-->D(*+)pp; decays, with upper limits established at 90% confidence level.

Conclusions:

  • The observed decays provide new data points for B meson physics.
  • The results contribute to the precise measurement of fundamental parameters in particle physics.
  • Further studies can explore theoretical implications of these decay modes.