Charged-lepton-flavour violation in the light of the Super-Kamiokande data

被引:150
作者
Ellis, J [1 ]
Gómez, ME
Leontaris, GK
Lola, S
Nanopoulos, DV
机构
[1] CERN, Div Theory, CH-1211 Geneva 23, Switzerland
[2] Inst Super Tecn, CFIF, Dept Fis, P-1049001 Lisbon, Portugal
[3] Univ Ioannina, Div Theoret Phys, GR-45110 Ioannina, Greece
[4] Texas A&M Univ, Dept Phys, Ctr Theoret Phys, College Stn, TX 77843 USA
[5] Houston Adv Res Ctr, Astroparticle Phys Grp, The Woodlands, TX 77381 USA
[6] Acad Athens, Chair Theoret Phys, Div Nat Sci, Athens 10679, Greece
来源
EUROPEAN PHYSICAL JOURNAL C | 2000年 / 14卷 / 02期
关键词
D O I
10.1007/s100520000357
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
Motivated by the data from Super-Kamiokande and elsewhere indicating oscillations of atmospheric and solar neutrinos, we study charged-lepton-flavour violation, in particular the radiative decays mu --> e gamma and tau --> mu gamma, but also commenting on mu --> 3e and tau --> 3 mu/e decays, as well as mu --> e conversion on nuclei. We first show how the renormalization group may be used to calculate flavour-violating soft supersymmetry-breaking masses for charged sleptons and sneutrinos in models with universal input parameters. Subsequently, we classify possible patterns of lepton-flavour violation in the context of phenomenalogical neutrino mass textures that accommodate the Super-Kamiokande data, giving examples based on Abelian flavour symmetries. Then we calculate in these examples rates for mu --> e gamma and tau --> mu gamma, which may be close to the present experimental upper limits, and show how they may distinguish between the different generic mixing patterns. The rates are promisingly large when the soft, supersymmetry-breaking mass parameters are chosen to be consistent with the cosmological relic-density constraints. In addition, we discuss mu --> e conversion on Titanium, which may also be accessible to future experiments.
引用
收藏
页码:319 / 334
页数:16
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