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arXiv 0906.5329hep-ph
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在UHE天体物理学中微子味比中新物理学的极端方案

Extreme scenarios of new physics in the UHE astrophysical neutrino flavour ratios

M. Bustamante, A. M. Gago, C. Pena-Garay

摘要:

我们添加一个能量无关的哈密顿量的标准味振荡之一。这种物理学可能出现在中微子与引力场的非零挠率耦合不同的理论中,或者更戏剧性地出现在味振荡中的CPT违反物理学中。如果这种贡献存在,在更高的能量实验是更敏感的自由参数,和味道转换可能会严重修改。我们证明了这种新物理对中微子混合角的修正,并在三中微子形式下找到了新的有效角与标准振荡参数Δ m_{ij} ^2,θ ij和δ CP以及新物理哈密顿量中的参数之间的关系式.我们考虑的情况下,新的参数允许极端偏差的预期中微子味比在地球上从他们的标准值。我们表明,大偏离的标准风味的情况是合理的,这将是一个强烈的暗示违反保守对称性。

英文摘要:

We add an energy-independent Hamiltonian to the standard flavour oscillation one. This kind of physics might appear in theories where neutrinos couple differently to a plausible non-zero torsion of the gravitational field or more dramatically in the presence of CPT-violating physics in the flavour oscillations. If this contribution exists, experiments at higher energies are more sensitive to their free parameters, and flavour conversion could be severely modified. We show that this new physics modifies the neutrino mixing angles and find expressions that relate the new, effective, angles to the standard oscillation parameters Δ_m_{ij}^2, θ_{ij} and δ_{CP}, and to the parameters in the new-physics Hamiltonian, within a three-neutrino formalism. We consider scenarios where the new parameters allow for extreme deviations of the expected neutrino flavour ratios at Earth from their standard values. We show that large departures of the standard flavour scenario are plausible, which would be a strong hint of the violation of a conserved symmetry.

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