Scalar form factors of light mesons
نویسندگان
چکیده
منابع مشابه
Scalar form factors of light mesons September 18 , 2004
The scalar radius of the pion plays an important role in χPT, because it is related to one of the basic effective coupling constants, viz. the one which controls the quark mass dependence of F π at one loop. In a recent paper, Ynduráin derives a robust lower bound for this radius, which disagrees with earlier determinations. We show that such a bound does not exist: the " derivation " relies on...
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The crucial points of physics of light scalar mesons are discussed. The special attention is given to the chiral shielding of lightest scalar mesons and the production of the well established light scalar mesons in the φ radiative decays. Arguments in favor of the four-quark model of the a 0 (980) and f 0 (980) mesons are given. To discuss actually the nature of the putative nonet of the light ...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2004
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2004.10.005