论文标题
光子 - α振荡诱导了光子极化的修饰
Photon-ALP oscillations inducing modifications to photon polarization
论文作者
论文摘要
轴突状颗粒（ALP）是非常轻，中性的，自旋零玻色子，这些玻色子由许多试图完成基本颗粒的标准模型所预测的。 Alps主要与两个光子相互作用，并且可以在存在外部磁场的情况下产生光子-ALP振荡。由于光子级振荡在非常高的能量（VHE）天体物理学中产生了深远的后果，因此它们引起了人们的兴趣。最近提出了两个有关ALP存在的提示。在本文中，我们研究了光子 - α相互作用的另一种效果：光子极化状态的变化。特别是，我们研究了产生光子的光子型束启动的传播 - 我们考虑在星系簇中产生的光子或在大黄蜂的射流中产生的光子 - 穿越多种磁化介质（Blazar Jet，Host Galaxy，Galaxy Galaxy，Galaxy cluster，Galaxy cluster，Galaxy cluster，Argalactic Space，Milecy Way，Milecy Way）到达地球。在存在光子-ALP相互作用的情况下，我们分析了最终光子存活概率$ p_ {γ\toγ} $，以及在范围$（1-10^{15}）中的线性极化$π_l$的相应光子度量度。我们观察到，在没有阿尔卑斯山的情况下，预期的光子被预期为非偏振，是通过光子 - α相互作用部分偏振的。我们的发现可以通过IXPE（已经操作）等观测值进行测试，并在X射线频带中由拟议的Missions Extp，XL-Calibur，NGXP和XPP进行测试，并由COSI（批准启动），E-ASTROGAM和AMEGO在高增强范围内。我们还发现了VHE频段中的一个特殊功能，其中$ \ sim（1-10）\，\ rm TEV $的光子由于具有光子-ALP的相互作用而完全极化。对此特征的可能检测将代表存在ALP的证据，但是不幸的是，当前的技术还不能检测到光子极化达到如此高的能量。
Axion-like particles (ALPs) are very light, neutral, spin zero bosons predicted by many theories which try to complete the standard model of elementary particles. ALPs interact primarily with two photons and can generate photon-ALP oscillations in the presence of an external magnetic field. They are attracting increasing interest since photon-ALP oscillations produce deep consequences in very-high-energy (VHE) astrophysics. Two hints for the existence of an ALP have recently been proposed. In this paper, we study another effect of the photon-ALP interaction: the change of the polarization state of photons. In particular, we study the propagation of the photon-ALP beam starting where photons are produced - we consider photons generated in a galaxy cluster or in the jet of a blazar - crossing several magnetized media (blazar jet, host galaxy, galaxy cluster, extragalactic space, Milky Way) up to their arrival at the Earth. In the presence of photon-ALP interaction, we analyze the final photon survival probability $P_{γ\to γ}$ and the corresponding photon degree of linear polarization $Π_L$ for energies in the range $(1-10^{15}) \, \rm eV$. We observe that photons, which are expected as unpolarized in the absence of ALPs, are made partially polarized by photon-ALP interaction. Our findings can be tested by observatories like IXPE (already operative), and by the proposed missions eXTP, XL-Calibur, NGXP and XPP in the X-ray band and by COSI (approved to launch), e-ASTROGAM and AMEGO in the high-energy range. We also discover a peculiar feature in the VHE band, where photons at energies above $ \sim (1-10) \, \rm TeV$ are fully polarized because of photon-ALP interaction. A possible detection of this feature would represent a proof for the existence of an ALP, but, unfortunately, current technologies do not allow yet to detect photon polarization up to so high energies.
