Extracting the Light Quark Mass Ratio mu/md from Bottomonia Transitions

被引：18

作者：

Guo, Feng-Kun ^{[1
,2
]}

Hanhart, Christoph ^{[1
,2
,3
]}

Meissner, Ulf-G. ^{[1
,2
,3
,4
,5
]}

机构：

[1] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany

[2] Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany

[3] Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany

[4] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[5] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 16期

关键词：

CHIRAL PERTURBATION-THEORY; HADRONIC TRANSITIONS; SYMMETRY; QCD;

D O I：

10.1103/PhysRevLett.105.162001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a new method to extract the light quark mass ratio m(u)/m(d) using the Gamma(4S) -> h(b)pi(0)(eta) bottomonia transitions. The decay amplitudes are dominated by the light quark mass differences, and the corrections from other effects are rather small, allowing for a precise extraction. We also discuss how to reduce the theoretical uncertainty with the help of future experiments. As a by-product, we show that the decay Gamma(4S) -> h(b)eta is expected to be a nice channel for searching for the h(b) state.

引用

页数：4

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