Lower bound to the pion polarizability from QCD sum rules

被引：7

作者：

Benmerrouche, M

Orlandini, G

Steele, TG

机构：

[1] UNIV TRENT,DIPARTIMENTO FIS,I-38050 TRENT,ITALY

[2] IST NAZL FIS NUCL,GRP COLLEGATO TRENTO,I-38050 TRENT,ITALY

来源：

PHYSICS LETTERS B | 1996年 / 366卷 / 1-4期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0370-2693(95)01386-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Making use of QCD sum rules a lower bound is found which relates the electromagnetic polarizability alpha(E) and mean-square radius [r(pi)(2)] of charged pions through the intrinsic polarizability <(alpha)over tilde(E)> = alpha(E) - alpha[r(pi)(2)]/(3M(pi)). We find that if present constraints on the QCD continuum (duality) threshold are accepted, this lower bound on the intrinsic polarizability <(alpha)over tilde(E)> is incompatible with some previous determinations of alpha(E) and [r(pi)(2)].

引用

页码：354 / 359

页数：6

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