ππ AMPLITUDES FITTED TO EXPERIMENTAL DATA AND TO ROY'S EQUATIONS
نویسندگان
چکیده
منابع مشابه
Application of Roy's Equations to Analysis of Ππ Experimental Data
Pions are produced in many reactions. A good experimental and theoretical information on low, medium and high-energy pion-pion interactions should give us a better understanding of nonperturbative QCD and of the chiral perturbation theory. It allows a better insight into qq̄ vacuum condensate and then into the mechanism of spontaneous breaking of chiral symmetry. It should also give a better kno...
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Roy’s equations are used to check if the scalar-isoscalar ππ scattering amplitudes fitted to experimental data fulfill crossing symmetry conditions. It is shown that the amplitudes describing the “down-flat” phase shift solution satisfy crossing symmetry below 1 GeV while the amplitudes fitted to the “up-flat” data do not. In this way the long standing ”up-down” ambiguity in the phenomenologica...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics A
سال: 2005
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x05022184