Neutrino Bounds on Astrophysical Sources and New Physics
Neutrino Bounds on Astrophysical Sources and New Physics
复制标题
中微子对天体物理来源和新物理学的影响
DOI：
10.1103/physrevd.66.103002
复制
发表时间：
2002
影响因子：
5
通讯作者：
A. Shapere
中科院分区：
文献类型：
--
作者：
L. Anchordoqui;Jonathan L. Feng;H. Goldberg;A. Shapere
超高能宇宙中微子既是天体物理源的尖端探测器，也是新TeV尺度物理的尖端探测器。这样的中微子将在大气层深处产生大范围的空气骤雨。没有这样的簇射意味着入射中微子通量和截面的上限。将现有最大的地面阵列AGASA的曝光与苍蝇眼荧光探测器在其所有运行时期的曝光相结合，我们得出了95%的CL界限，大大改善了现有的界限。我们从假设标准模型截面的天体物理通量的与模型无关的界限开始，以及假设保守的宇宙成因通量而对新的物理截面的模型无关的界限。然后，我们推导了几个假定的功率谱对中微子通量的新分量的依赖于模型的约束，并更新了来自黑洞产生的额外维度场景中基本普朗克尺度MD的界限。对于大量的额外维度，我们发现Mmin BH=MD(5MD)的MD>；2.0(1.1)TeV相当于或超过了迄今为止最严格的约束。
Ultra-high energy cosmic neutrinos are incisive probes of both astrophysical sources and new TeV-scale physics. Such neutrinos would create extensive air showers deep in the atmosphere. The absence of such showers implies upper limits on incoming neutrino fluxes and cross sections. Combining the exposures of AGASA, the largest existing ground array, with the exposure of the Fly’s Eye fluorescence detector integrated over all its operating epochs, we derive 95% CL bounds that substantially improve existing limits. We begin with model-independent bounds on astrophysical fluxes, assuming standard model cross sections, and model-independent bounds on new physics cross sections, assuming a conservative cosmogenic flux. We then derive model-dependent constraints on new components of neutrino flux for several assumed power spectra, and we update bounds on the fundamental Planck scale MD in extra dimension scenarios from black hole production. For large numbers of extra dimensions, we find MD > 2.0 (1.1) TeV for M min BH = MD (5MD), comparable to or exceeding the most stringent constraints to date.
影响因子：
8.6
作者：
Fukuda, Y;Hayakawa, T;Young, K
通讯作者：
Young, K