Lorentz violation constraints with astroparticle physics

Topics in Lorentz and CPT violation

This talk given at the CPT'10 meeting provides a brief introduction to Lorentz and CPT violation and outlines a few recent developments in the subject.

利用天体粒子物理仪器寻找超出标准模型的物理

Searches for beyond-standard-model physics with astroparticle physics instruments

本文综述 IceCube、Fermi 和 KATRIN 等天体粒子物理仪器如何利用极端能区探测暗物质、轴子、惰性中微子及 LIV 等超出标准模型的物理。

Lorentz and Diffeomorphism Violations in Linearized Gravity

Lorentz and diffeomorphism violations are studied in linearized gravity using effective field theory. A classification of all gauge-invariant and gauge-violating terms is given. The exact covariant dispersion relation for gravitational modes involving operators of arbitrary mass dimension is constructed, and various special limits are discussed.

芬斯勒几何中的洛伦兹破缺

Lorentz Violation in Finsler Geometry

该研究介绍芬斯勒几何的数学基础，综述其与修正色散关系及双重狭义相对论、标准模型扩展、甚狭义相对论等洛伦兹破缺理论的关联，探讨其物理影响，为洛伦兹破缺研究提供几何工具支撑。

On the use of energy loss mechanisms to constrain Lorentz invariance violations

In light of recent and probably upcoming observations of very high energy astroparticles, such as those reported by the IceCube collaboration, we readdress the energy loss mechanism by Lorentz violating particles. We analytically show that Cohen-Glashow's formula for energy loss is connected with a Poisson distribution for the number of decays, whose large fluctuations prevent placing bounds on Lorentz invariance violations. However, this model ignores the sharp change in the decay width after each process. We propose replacing Poisson statistics with a new distribution that takes this into ac…

Constraints on neutrino speed, weak equivalence principle violation, Lorentz invariance violation, and dual lensing from the first high-energy astrophysical neutrino source TXS 0506+056

We derive stringent constraints on neutrino speed, weak equivalence principle violation, Lorentz invariance violation, and dual lensing from the first high-energy astrophysical neutrino source: TXS 0506+056. Observation of neutrino (IceCube-170922A) and photons in a similar time frame and from the same direction is used to derive these limits. We describe ways in which these constraints can be further improved by orders of magnitude.