Positivity constraints on LECs of χPT lagrangian at (p⁶) level
Guo, Zhi-Hui · Zhang, Ou · Zheng, H. Q.
Original · EN
Positivity constraints on the LECs of (p⁶) χPT lagrangian are discussed. We demonstrate that the constraints are automatically satisfied inside the Mandelstam triangle for ππ scatterings, when NC is large. Numerical tests are made in the NC=3 case, and it is found that these constraints are also well respected.
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