Contents

• 1 Radiative decays
  • 1.1 Matrix elements and kinematics
  • 1.2 Decay rates
  • 1.3 Determination of and
  • 1.4 Previous experiments
  • 1.5 Theory
  • 1.6 Comment on tensor couplings
  • 1.7 Improvements at DANE
• 2 The decays
  • 2.1 Matrix elements
  • 2.2 Decay distributions
  • 2.3 Theory
  • 2.4 Numerical results
  • 2.5 Present experimental status
  • 2.6 Improvements at DANE
• 3 decays
  • 3.1 Matrix elements and kinematics
  • 3.2 Decay rates
  • 3.3 Determination of the form factors
  • 3.4 Previous measurements
  • 3.5 Theory
  • 3.6 Comment on tensor couplings
  • 3.7 Improvements at DANE
• 4 Radiative decays
  • 4.1 Matrix elements
  • 4.2 Decay rates
  • 4.3 Previous experiments
  • 4.4 Theory
  • 4.5 Improvements at DANE
• 5 decays
  • 5.1 Kinematics
  • 5.2 Matrix elements
  • 5.3 Decay rates
  • 5.4 Isospin decomposition
  • 5.5 Partial wave expansion
  • 5.6 Previous experiments
  • 5.7 Theory
  • 5.8 Determination of and
  • 5.9 Predictions
  • 5.10 Improvements at DANE
• 6 decays
  • 6.1 Matrix elements and decay rates
  • 6.2 Previous experiments
  • 6.3 Theory
  • 6.4 Improvements at DANE
• A Notation
• B Loop integrals
• C Decomposition of the hadronic tensors
• D One-loop corrections to form factors
• References

Note:

• The number of events quoted for DANE are based on a luminosity of , which is equivalent [1] to an annual rate of tagged (1 year = assumed).
• Whenever we quote a branching ratio for a semileptonic decay, it stands for the branching ratio of the corresponding decay, e.g.,

  

• We use the data from the Particle Data Group edition 1990 [3] throughout. Please contact one of the authors in case that very high precision is needed for a particular matrix element. We would then convert the relevant quantity to the newest data compilation available.
• If not stated explicitly, we always use for the low-energy constants the values displayed in table 1 in ref. [2].
• More notation is provided in appendix A.