JEM-EUSO天文台超对称破缺的间接探测
Indirect Probes of Supersymmetry Breaking in the JEM-EUSO Observatory
摘要：
在本文中，我们提出了间接探测超对称破缺的规模，通过日本实验模块（JEM-EUSO）上的极端宇宙空间天文台的观测。我们考虑的情况下，最轻的超对称粒子是引力子，和下一个最轻的（NLSP）是一个长寿的slepton。我们表明，JEM-EUSO将能够探测NLSP衰变的模型，因此探测低于$5 \times 10^6$ GeV的超对称破缺标度。该观测站的视野将足够大，每年可以探测到几十个事件，这取决于它的能量阈值。这是对先前提议的补充（Albuquerque等人，2004年），其中表明1千米$^3$中微子望远镜可以直接探测这个尺度。NLSP将由地球中高能中微子的相互作用产生。在这里，我们研究了它们随后衰变的情况，无论是在逃离地球后在大气中还是在离开地球之前，产生τ。它们可以被JEM-EUSO探测到，并有两个独特的特征：一是它们在地球上产生，并在大气中向上传播，这允许与大气Taus区分开来，二是由于NLSP总是成对产生，重合Taus将是这些事件的强烈特征。假设中微子通量相当于Waxman-Bahcall极限，我们确定了到达JEM-EUSO视场的NLSP衰变的τ率。
英文摘要：
In this paper we propose indirect probes of the scale of supersymmetry breaking, through observations in the Extreme Universe Space Observatory onboard Japanese Experiment Module (JEM-EUSO). We consider scenarios where the lightest supersymmetric particle is the gravitino, and the next to lightest (NLSP) is a long lived slepton. We demonstrate that JEM-EUSO will be able to probe models where the NLSP decays, therefore probing supersymmetric breaking scales below $5 \times 10^6$ GeV. The observatory field of view will be large enough to detect a few tens of events per year, depending on its energy threshold. This is complementary to a previous proposal (Albuquerque et al., 2004) where it was shown that 1 Km$^3$ neutrino telescopes can directly probe this scale. NLSPs will be produced by the interaction of high energy neutrinos in the Earth. Here we investigate scenarios where they subsequently decay, either in the atmosphere after escaping the Earth or right before leaving the Earth, producing taus. These can be detected by JEM-EUSO and have two distinctive signatures: one, they are produced in the Earth and go upwards in the atmosphere, which allows discrimination from atmospheric taus and, second, as NLSPs are always produced in pairs, coincident taus will be a strong signature for these events. Assuming that the neutrino flux is equivalent to the Waxman-Bahcall limit, we determine the rate of taus from NLSP decays reaching JEM-EUSO's field of view.
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。
