The Axion mass in modular invariant supergravity

The Axion mass in modular invariant supergravity
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模不变超重力中的轴子质量

DOI:
10.1016/j.physletb.2005.03.024
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发表时间:
2005
期刊:
影响因子:
4.4
通讯作者:
M. Gaillard
M. Gaillard
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
D. Butter;M. Gaillard

文献摘要

被引文献

相似文献

当超对称性被具有单一凝聚规范群的凝聚体破坏时,存在一个非反常的R对称性,它阻止了万有轴子获得质量。有人认为,在超引力的背景下,高维算符将打破这种对称性,并可能产生太大的轴子质量,以至于无法将万能轴子与QCD轴子相识别。我们发现,在一类模型中,这种对轴子质量的贡献是被高度抑制的,在这类模型中,伽吉诺和物质凝聚的有效拉格朗日遵守模不变性(T-对偶)。
When supersymmetry is broken by condensates with a single condensing gauge group, there is a nonanomalous R-symmetry that prevents the universal axion from acquiring a mass. It has been argued that, in the context of supergravity, higher dimension operators will break this symmetry and may generate an axion mass too large to allow the identification of the universal axion with the QCD axion. We show that such contributions to the axion mass are highly suppressed in a class of models where the effective Lagrangian for gaugino and matter condensation respects modular invariance (T-duality).