Making use of QCD sum rules a lower bound is found which relates the electromagnetic polarizability αE and mean-square radius 〈rπ2〉 of charged pions through the intrinsic polarizability alpha_E = alpha_E − alpha 〈rπ2〉(3Mπ). We find that if present constraints on the QCD continuum (duality) threshold are accepted, this lower bound on the intrinsic polarizability αE is incompatible with some previous determinations of alpha_E and 〈rπ2〉.

Lower bound to the pion polarizability from QCD sum rules

Orlandini, Giuseppina;
1996-01-01

Abstract

Making use of QCD sum rules a lower bound is found which relates the electromagnetic polarizability αE and mean-square radius 〈rπ2〉 of charged pions through the intrinsic polarizability alpha_E = alpha_E − alpha 〈rπ2〉(3Mπ). We find that if present constraints on the QCD continuum (duality) threshold are accepted, this lower bound on the intrinsic polarizability αE is incompatible with some previous determinations of alpha_E and 〈rπ2〉.
1996
M., Benmerrouche; Orlandini, Giuseppina; T., Steele
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/71252
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