PRECISE MASS-RATIO DEPENDENCE OF 4TH-ORDER LEPTON ANOMALOUS MAGNETIC-MOMENTS - EFFECT OF A NEW MEASUREMENT OF M-TAU

被引：35

作者：

LI, G ^{[1
]}

MENDEL, R ^{[1
]}

SAMUEL, MA ^{[1
]}

机构：

[1] UNIV WESTERN ONTARIO,DEPT APPL MATH,LONDON N6A 5B9,ONTARIO,CANADA

来源：

PHYSICAL REVIEW D | 1993年 / 47卷 / 04期

关键词：

D O I：

10.1103/PhysRevD.47.1723

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the fourth-order contribution of the one-bubble diagram to a = (g - 2) /2 of the charged leptons for arbitrary mass ratio k = m1/m2. We verify that our recent formulas for a1 (k) = a(k), k < 1, and a2(k) = a (k), k > 1, reduce smoothly to a (k = 1) = 119/36 - pi2/3 from both sides, thus verifying the correctness of our formulas for a1 and a2. We also give very accurate results for all combinations of m1, m2 = m(e), m(mu), and m(tau), where the accuracy is limited only by the present experimental accuracy of the masses m(e), m(mu), and m(tau). We consider a new more accurate measurement of the mass of the tau lepton and compute its effect on the QED contribution to a(mu) and a(tau). The results for a(tau)QED and a(tau) are unchanged. Our result for a(mu)QED is changed by 3.3(5) X 10(-12), but a(mu)th remains unchanged.

引用

页码：1723 / 1725

页数：3

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