论文标题
腐烂的中inino作为暗物质及其伽马射线光谱
A decaying neutralino as dark matter and its gamma ray spectrum
论文作者
论文摘要
结果表明，超级统一框架中的腐烂中性诺是暗物质的可行候选者。这种情况是在隐藏扇区存在的情况下出现的，并在可见的扇区具有超视联耦合，中性诺可以在该扇区中腐烂到隐藏扇区最轻的超对称粒子（LSP），其寿命比宇宙的寿命大。我们提出了一个混凝土模型，其中MSSM/Sugra扩展到包括$ u（1）_ {x_1} \ times u（1）_ {x_2} $ gauge部门和隐藏扇区的LSP组成的隐藏扇区，隐藏扇区的LSP比可见扇区的LSP中性较轻。我们计算了可见扇区中性诺的环路抑制辐射衰减到隐藏区域的中性诺中，并表明衰变可以随着寿命大于宇宙的年龄而发生。可以通过间接检测实验探测衰减的中性诺，特别是通过其签名衰减到隐藏的扇形中性诺和一个能量的伽玛射线光子中。可以通过Fermi-LAT的灵敏度以及未来的实验，例如平方公里阵列（SKA）和Cherenkov望远镜阵列（CTA）来搜索这种伽玛射线。我们提出了几种基准测试，它们自然地抑制了来自暗物质歼灭和衰变的辐射通道，并且与对抗抗原背景的测量相一致。
It is shown that a decaying neutralino in a supergravity unified framework is a viable candidate for dark matter. Such a situation arises in the presence of a hidden sector with ultraweak couplings to the visible sector where the neutralino can decay into the hidden sector's lightest supersymmetric particle (LSP) with a lifetime larger than the lifetime of the universe. We present a concrete model where the MSSM/SUGRA is extended to include a hidden sector comprised of $U(1)_{X_1} \times U(1)_{X_2}$ gauge sector and the LSP of the hidden sector is a neutralino which is lighter than the LSP neutralino of the visible sector. We compute the loop suppressed radiative decay of the visible sector neutralino into the neutralino of the hidden sector and show that the decay can occur with a lifetime larger than the age of the universe. The decaying neutralino can be probed by indirect detection experiments, specifically by its signature decay into the hidden sector neutralino and an energetic gamma ray photon. Such a gamma ray can be searched for with improved sensitivity at Fermi-LAT and by future experiments such as the Square Kilometer Array (SKA) and the Cherenkov Telescope Array (CTA). We present several benchmarks which have a natural suppression of the hadronic channels from dark matter annihilation and decays and consistent with measurements of the antiproton background.
