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The LFU ratio in the Standard Model and beyond.

Marzia Bordone1,2, Claudia Cornella3, Gino Isidori3

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This summary is machine-generated.

Precise tests of lepton universality in B meson decays can be performed by comparing muonic and electronic decay widths. This ratio offers high accuracy predictions within and beyond the Standard Model.

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Area of Science:

  • Particle Physics
  • High Energy Physics
  • Standard Model Physics

Background:

  • Lepton universality is a key principle in the Standard Model.
  • Deviations from lepton universality in B meson decays could indicate new physics.

Purpose of the Study:

  • To investigate precise tests of lepton universality in B meson decays.
  • To explore the predictive power of decay width ratios within and beyond the Standard Model.

Main Methods:

  • Analyzing dilepton invariant mass spectrum.
  • Calculating the ratio of muonic to electronic decay widths.
  • Developing numerical expressions for data analysis.

Main Results:

  • High accuracy predictions for the ratio of muonic to electronic decay widths are achievable.
  • The ratio is predictable across wide regions of the dilepton invariant mass spectrum.
  • The predictions hold true both within and beyond the Standard Model.

Conclusions:

  • Precise tests of lepton universality in B meson decays are feasible.
  • The ratio of decay widths provides a sensitive probe of short-distance dynamics.
  • Observed deviations can yield crucial information about new physics phenomena.