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hep-ph2008★ 10 cited
A note on the determination of light quark masses
A. Deandrea, A. Nehme, P. Talavera
We provide a model-independent determination of the quantity B_0(m_d-m_u). Our approach rests only on chiral symmetry and data from the decay of the eta into three neutral pions. S…
hep-ph2003
S-wave pi-pi scattering lengths
N. Nasrallah
An old calculation of the s-wave pi-pi scattering lengths is updated and supplemented with experimental data on the pi-pi s-wave phase shift. The results ma0 = .215 and ma2 = -.039…
hep-ph2002
Charged pion pair production by two photons from a chiral sum rule
N. F. Nasrallah, K. Schilcher
The cross-section for a charged pion pair production by two photons is evaluated by using the low energy expression previously obtained from current algebra and PCAC which involves…