arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0709.3940hep-phhep-exhep-th
收藏

根据最近的PVLAS数据约束Randall-Sundrum模量

Constraining the Randall-Sundrum modulus in the light of recent PVLAS data

Debaprasad Maity, Sourov Roy, Soumitra SenGupta

备注：
26 pages, 1 figure, LaTex; added references, typos corrected. Minor changes in the text, a comment added in the Conclusion
发表信息：
Phys.Rev.D77:015010,2008
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

最近的PVLAS数据对在恒定均匀磁场中传播的电磁波的双折射和二向色性的测量提出了严格的限制。当假设适当的轴子电磁耦合时，已经有理论预测支持这种现象。从量子一致性的要求出发，这种耦合的起源可以追溯到低能弦作用。在这样的模型中产生的耦合，是弦理论中不可避免地存在的额外维度紧化的产物。因此，编码紧致流形的模量参数在确定轴子-光子耦合中起着至关重要的作用。在这项工作中，我们研究可能的界限上的紧凑的模量的值，出现从PVLAS数据得到的耦合的实验限制。特别是，我们专注于兰德尔-Sundrum（RS）型的翘曲几何模型的模量参数已经限制从要求的分辨率的规范层次问题与质量的希格斯玻色子。我们探讨了在PVLAS的双折射和二向色性数据的轴子质量的宽范围的模量上的约束。我们表明，建议的值的模量在RS的情况下，只能容纳轴子质量$\gsim$ 0.3 eV。

英文摘要：

Recent PVLAS data put stringent constraints on the measurement of birefringence and dichroism of electromagnetic waves travelling in a constant and homogeneous magnetic field. There have been theoretical predictions in favour of such phenomena when appropriate axion-electromagnetic coupling is assumed. Origin of such a coupling can be traced in a low energy string action from the requirement of quantum consistency. The resulting couplings in such models are an artifact of the compactification of the extra dimensions present inevitably in a string scenario. The moduli parameters which encode the compact manifold therefore play a crucial role in determining the axion-photon coupling. In this work we examine the possible bounds on the value of compact modulus that emerge from the experimental limits on the coupling obtained from the PVLAS data. In particular we focus into the Randall-Sundrum (RS) type of warped geometry model whose modulus parameter is already restricted from the requirement of the resolution of gauge hierarchy problem in connection with the mass of the Higgs. We explore the bound on the modulus for a wide range of the axion mass for both the birefringence and the dichroism data in PVLAS. We show that the proposed value of the modulus in the RS scenario can only be accommodated for axion mass $\gsim$ 0.3 eV.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑