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arXiv 1109.4980hep-phhep-exhep-th
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长基线实验中的超光速中微子和SN1987a

Superluminal neutrinos in long baseline experiments and SN1987a

Giacomo Cacciapaglia, Aldo Deandrea, Luca Panizzi

摘要:

中微子洛伦兹不变性的精确测试可以使用长基线实验,如MINOS和OPERA或来自天体物理学来源的中微子。MINOS合作报告了一个μ子中微子速度的测量结果,暗示了超光速传播,最近由OPERA在6 sigma上证实。我们考虑一个一般的参数化,它超出了通常的线性或二次违反考虑量子引力模型。我们还提出了一个玩具模型,说明为什么洛伦兹破坏可以是特定的中微子部门,并引起一个通用的能量行为E^alpha,其中α不一定是一个整数。超新星边界和首选MINOS和OPERA地区显示出紧张局势,由于没有形状变形的中微子束在远探测器的MINOS。OPERA的结果也指出了这种效应的能量独立性。

英文摘要:

Precise tests of Lorentz invariance in neutrinos can be performed using long baseline experiments such as MINOS and OPERA or neutrinos from astrophysical sources. The MINOS collaboration reported a measurement of the muonic neutrino velocities that hints to super-luminal propagation, very recently confirmed at 6 sigma by OPERA. We consider a general parametrisation which goes beyond the usual linear or quadratic violation considered in quantum-gravitational models. We also propose a toy model showing why Lorentz violation can be specific to the neutrino sector and give rise to a generic energy behaviour E^alpha, where alpha is not necessarily an integer number. Supernova bounds and the preferred MINOS and OPERA regions show a tension, due to the absence of shape distortion in the neutrino bunch in the far detector of MINOS. The energy independence of the effect has also been pointed out by the OPERA results.

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