来自宇宙射线与暗物质碰撞的Cosmic-ray膝和弥散γ、e+和pbar通量
Cosmic-ray knee and diffuse gamma, e+ and pbar fluxes from collisions of cosmic rays with dark matter
摘要：
在具有额外维度的模型中，引力的基本尺度M_D可以是TeV量级。在这种情况下，能量为E的宇宙质子与暗物质粒子χ之间的相互作用截面将随着质心能量\sqrt{2m_χE}高于M_D的能量E而快速增长，当能量E \approx为10^9 GeV时，它可能达到1 mbarn。我们表明，这些引力介导的过程会打破质子，并产生粒子/反粒子的扩散通量，同时用初始质子能量的一小部分提高χ。我们发现，预期的横截面和暗物质密度是不足以产生一个可观察到的不对称性的最具活力的（河外）宇宙射线的流量。然而，我们建议，未抑制的TeV相互作用可能是在银河系宇宙射线的光谱中观察到的膝盖的起源。膝关节将出现在暗物质粒子与被\muG磁场捕获在星系中的宇宙质子相互作用的能量阈值处，这意味着次级反粒子和TeV伽马射线的明确通量。
英文摘要：
In models with extra dimensions the fundamental scale of gravity M_D could be of order TeV. In that case the interaction cross section between a cosmic proton of energy E and a dark matter particle χwill grow fast with E for center of mass energies \sqrt{2m_χE} above M_D, and it could reach 1 mbarn at E\approx 10^9 GeV. We show that these gravity-mediated processes would break the proton and produce a diffuse flux of particles/antiparticles, while boosting χwith a fraction of the initial proton energy. We find that the expected cross sections and dark matter densities are not enough to produce an observable asymmetry in the flux of the most energetic (extragalactic) cosmic rays. However, we propose that unsuppressed TeV interactions may be the origin of the knee observed in the spectrum of galactic cosmic rays. The knee would appear at the energy threshold for the interaction of dark matter particles with cosmic protons trapped in the galaxy by \muG magnetic fields, and it would imply a well defined flux of secondary antiparticles and TeV gamma rays.
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。
