Pion decay constant
In particle physics, the pion decay constant is the square root of the coefficient in front of the kinetic term for the pion in the low-energy effective action. It is dimensionally an energy scale and it determines the strength of the chiral symmetry breaking. The values are:
Beware: There are several conventions which differ by factors of . The textbook by Weinberg uses the value 184 MeV. The textbook by Peskin and Schroeder uses the value 93 MeV.
- Particle Data Group: W.-M. Yao et al., J. Phys. G 33, 1 (2006).
- Griffiths, David J. (1987). Introduction to Elementary Particles. Wiley, John & Sons, Inc. ISBN 978-0-471-60386-3.
- Particle Data Group: Decay constants of charged pseudoscalar mesons
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