Constraining Anisotropic Lorentz Violation via the Spectral-lag Transition of GRB 160625B
Constraining Anisotropic Lorentz Violation via the Spectral-lag Transition of GRB 160625B
复制标题
通过 GRB 160625B 的光谱滞后转变约束各向异性洛伦兹破坏
DOI：
10.3847/1538-4357/aa7630
复制
发表时间：
2017
影响因子：
4.9
通讯作者：
Kostelecky V. Alan
中科院分区：
文献类型：
--
作者：
Wei Jun-Jie;Wu Xue-Feng;Zhang Bin-Bin;Shao Lang;Meszaros Peter;Kostelecky V. Alan
违反洛伦兹不变性会导致光的能量依赖真空色散，从而导致从给定瞬态源产生的具有不同能量的光子的到达时间差异。利用观测到的伽玛射线暴GRB 160625B的光谱滞后，获得了非双折射洛伦兹违反效应的方向依赖色散约束。这种爆发具有异常大的高能光子统计量，因此我们可以从高能光子束的真实光谱时间滞后中获得约束，而不是从单个最高能量光子的粗略时间滞后中获得约束。此外，GRB 160625B是迄今为止唯一一个具有从正滞后到负滞后的明确转变的爆发，这为区分洛伦兹违反效应和不同能带光子发射的任何源固有时间滞后提供了独特的机会。我们的研究结果为洛伦兹违反的各种各向同性和各向异性系数提供了相对稳健的双边约束，包括光子扇区中质量维数为10的算子的洛伦兹违反效应的第一个边界。
Violations of Lorentz invariance can lead to an energy-dependent vacuum dispersion of light, which results in arrival-time differences of photons with different energies arising from a given transient source. In this work, direction-dependent dispersion constraints are obtained on nonbirefringent Lorentz-violating effects using the observed spectral lags of the gamma-ray burst GRB 160625B. This burst has unusually large high-energy photon statistics, so we can obtain constraints from the true spectral time lags of bunches of high-energy photons rather than from the rough time lag of a single highest-energy photon. Also, GRB 160625B is the only burst to date having a well-defined transition from positive lags to negative lags, providing a unique opportunity to distinguish Lorentz-violating effects from any source-intrinsic time lag in the emission of photons of different energy bands. Our results place comparatively robust two-sided constraints on a variety of isotropic and anisotropic coefficients for Lorentz violation, including the first bounds on Lorentz-violating effects from operators of mass dimension 10 in the photon sector.