Violations of lepton-flavour universality in P→lν decays: a model-independent analysis

被引：8
|
作者：
Filipuzzi, Alberto [1 ,2 ]
Isidori, Gino [3 ]
机构：
[1] Univ Valencia, CSIC, Dept Fis Teor, Valencia 46071, Spain
[2] Univ Valencia, CSIC, IFIC, Valencia 46071, Spain
[3] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
来源：
EUROPEAN PHYSICAL JOURNAL C | 2009年 / 64卷 / 01期
关键词：
Yukawa Coupling; Neutrino Masse; Effective Field Theory; Neutrino Mass Matrix; Minimal Flavour Violation;
D O I：
10.1140/epjc/s10052-009-1130-z
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We analyse the violations of lepton-flavour universality in the ratios B(P -> l nu)/B(P -> l(')l nu) using a general effective theory approach, discussing various flavour-symmetry breaking patterns of physics beyond the SM. We find that in models with Minimal Lepton Flavour Violation the effects are too small to be observed in the next generations of experiments in all relevant meson systems (P=pi,K,B). In a Grand Unified framework with minimal breaking of the flavour symmetry, the effects remain small in pi and K decays, while large violations of lepton-flavour universality are possible in B -> l nu decays.
引用
收藏
页码：55 / 62
页数：8
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