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arXiv 1807.05201astro-ph.HEastro-ph.COgr-qchep-ex
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IceCube-170922A中微子与光子间微分Shapiro延迟的限制

Constraints on differential Shapiro delay between neutrinos and photons from IceCube-170922A

Sibel Boran, Shantanu Desai, Emre O. Kahya

摘要:

2017年9月22日,IceCube合作组织从伽马射线耀变体TXS 0506+056的方向检测到一个能量约为290 TeV的中微子,距离约为1.75 Gpc。在同一时间,多个望远镜同时观测到增强的伽马射线耀斑,这是继SN 1987 A之后第二次同时观测到中微子/光子。我们指出,对于这一事件,中微子和光子遇到了夏皮罗延迟约6300天的方式从源。从这个延迟和中微子和光子到达时间之间的相对时间差,人们可以限制对TeV中微子的爱因斯坦弱等效原理(WEP)的违反。我们使用参数化后牛顿(PPN)参数$γ$,这是由$|γ_{\rm ν}-γ_{\rm{EM}}|<5.5 \times 10^{-2}$,假设中微子和光子到达时间之间的时间差为175天,约束这样的违反WEP。

英文摘要:

On 22nd September 2017, the IceCube Collaboration detected a neutrino with energy of about 290 TeV from the direction of the gamma-ray blazar TXS 0506+056, located at a distance of about 1.75 Gpc. During the same time, enhanced gamma-ray flaring was also simultaneously observed from multiple telescopes, giving rise to only the second coincident astrophysical neutrino/photon observation after SN 1987A. We point out that for this event, both neutrinos and photons encountered a Shapiro delay of about 6300 days along the way from the source. From this delay and the relative time difference between the neutrino and photon arrival times, one can constrain violations of Einstein's Weak Equivalence Principle (WEP) for TeV neutrinos. We constrain such violations of WEP using the Parameterized Post-Newtonian (PPN) parameter $γ$, which is given by $|γ_{\rm ν}-γ_{\rm{EM}}|<5.5 \times 10^{-2}$, after assuming time difference of 175 days between neutrino and photon arrival times.

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