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Related Experiment Videos

Evidence for B+-->omegal+nu.

C Schwanda1, K Abe, K Abe

  • 1Institute of High Energy Physics, Vienna.

Physical Review Letters
|November 5, 2004
PubMed

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Summary
This summary is machine-generated.

Researchers detected the B+ to omega lepton neutrino decay using Belle detector data. This study measured the decay

Area of Science:

  • Particle Physics
  • High-Energy Physics
  • Experimental Physics

Background:

  • The B+ meson is a key subject in particle physics research.
  • Understanding B+ meson decays provides insights into fundamental interactions.
  • Previous studies have explored various B+ meson decay modes.

Purpose of the Study:

  • To search for and measure the branching fraction of the B+ --> omega(+)nu decay.
  • To investigate electroweak interactions involving B+ mesons.
  • To contribute to the precise determination of fundamental parameters in the Standard Model.

Main Methods:

  • Analysis of 78 fb^-1 of Upsilon(4S) data collected by the Belle detector.
  • Reconstruction of the final state involving the omega decay (pi(+)pi(-)pi(0)).

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  • Utilizing detector hermeticity to estimate neutrino momentum.

    • Main Results:

    • Observed a signal of 414+/-125 events for the B+ --> omega(+)nu decay.
    • Measured the branching fraction to be (1.3+/-0.4+/-0.2+/-0.3)x10^-4.
    • The third uncertainty accounts for estimated form-factor uncertainties.

    Conclusions:

    • The B+ --> omega(+)nu decay has been observed.
    • The measured branching fraction provides valuable data for theoretical models.
    • Further studies can refine the precision of this measurement and explore related phenomena.