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arXiv 0808.0673astro-phhep-phhep-th
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宇宙微波背景的赝标扰动和偏振

Pseudoscalar perturbations and polarization of the cosmic microwave background

Maxim Pospelov, Adam Ritz, Constantinos Skordis

摘要:

我们表明,新的粒子物理模型包含无质量赝标量场超弱耦合到光子可以非常有效地探测与CMB偏振各向异性。在暴胀过程中产生的随机赝标涨落提供了一种机制,用于在光子从最后散射表面传播期间将E模式偏振转换为B模式。这个转换过程的效率由无量纲比H/(2πf_a)控制,其中H是暴胀时的哈勃尺度,f_a^{-1}是光子与赝标耦合的强度。目前对B模的观测限制使这个比值小于0.07,在许多暴胀模型中,这意味着对超过10^{14} GeV的f_a值的灵敏度超过了其他测试的灵敏度。

英文摘要:

We show that models of new particle physics containing massless pseudoscalar fields super-weakly coupled to photons can be very efficiently probed with CMB polarization anisotropies. The stochastic pseudoscalar fluctuations generated during inflation provide a mechanism for converting E-mode polarization to B-mode during photon propagation from the surface of last scattering. The efficiency of this conversion process is controlled by the dimensionless ratio H/(2πf_a), where H is the Hubble scale during inflation, and f_a^{-1} is the strength of the pseudoscalar coupling to photons. The current observational limits on the B-mode constrain this ratio to be less than 0.07, which in many models of inflation translates to a sensitivity to values of f_a in excess of 10^{14} GeV, surpassing the sensitivity of other tests.

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。

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