Lessons from CLEO and FOCUS measurements of D0-(D0)over-bar mixing parameters

被引：112

作者：

Bergmann, S ^{[1
]}

Grossman, Y

Ligeti, Z

Nir, Y

Petrov, AA

机构：

[1] Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel

[2] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[3] Fermilab Natl Accelerator Lab, Theory Grp, Batavia, IL 60510 USA

[4] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA

[5] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

来源：

PHYSICS LETTERS B | 2000年 / 486卷 / 3-4期

基金：

以色列科学基金会;

关键词：

D O I：

10.1016/S0370-2693(00)00772-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

If the true values of the D degrees-<(D degrees)over bar> mixing parameters lie within the one sigma ranges of recent measurements, then there is strong evidence for a large width difference, y greater than or similar to 0.01, and large SU(3) breaking effects in strong phases, delta greater than or similar to pi/4. These constraints are model independent, and would become stronger if /M-12/Gamma(12)/ much less than 1 in the D degrees-<(D degrees)over bar> system. The interesting fact that the FOCUS result cannot be explained by a large mass difference is not trivial and depends on the small D degrees/<(D degrees)over bar> production asymmetry in FOCUS and the bounds on CP violating effects from CLEO, The large value of delta might help explain why y similar to sin(2)theta(c). (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：418 / 425

页数：8

共 24 条

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