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arXiv 2301.02258hep-phastro-ph.HE
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18 TeV GRB 221009A 的轻标量解释

Light scalar explanation for 18 TeV GRB 221009A

Shyam Balaji, Maura E. Ramirez-Quezada, Joseph Silk, Yongchao Zhang

AI总结:

针对 GRB 221009A 中 18 TeV 光子因 EBL 衰减难以到达地球的问题,提出轻标量单态与 SM Higgs 混合的新物理机制,通过标量粒子在传播中衰变为光子解释观测结果。

摘要:

最近的天体物理暂现源 Swift J1913.1+1946 可能与伽马射线暴 GRB 221009A 相关联。该事件的红移为 $z\simeq 0.151$。极高能伽马射线(高达 18 TeV)伴随该暂现源出现并被 LHAASO 观测到,此外 Carpet-2 探测到了一个 251 TeV 的类光子空气簇射。如此高能的光子在到达地球前,预期会轻易与弥漫河外背景光(EBL)发生湮灭。如果伽马射线认证和红移测量正确,可能需要新物理来解释这些测量结果。本文提供了对 LHAASO 报告的最高能 18 TeV 事件的首次 CP 偶标量解释。在这一最简场景中,轻标量单态 $S$ 与标准模型(SM)Higgs 玻色子 $h$ 混合。高 Boost 的 $S$ 粒子在 GRB 中产生,随后在向地球传播时发生辐射衰变双光子 $S\rightarrow γγ$。因此,产生的光子可能在遥远区域产生,而未被 EBL 抵消。因此,伽马射线通常的指数衰减由于光学深度的倒数衰减而被消除,由于标量载流子,该光学深度变得大得多。

英文摘要:

Recent astrophysical transient Swift J1913.1+1946 may be associated with the $γ$-ray burst GRB 221009A. The redshift of this event is $z\simeq 0.151$. Very high-energy $γ$-rays (up to 18 TeV) followed the transient and were observed by LHAASO, additionally Carpet-2 detected a photon-like air shower of 251 TeV. Photons of such high energy are expected to readily annihilate with the diffuse extragalactic background light (EBL) before reaching Earth. If the $γ$-ray identification and redshift measurements are correct, new physics could be necessary to explain these measurements. This letter provides the first CP-even scalar explanation of the most energetic 18 TeV event reported by LHAASO. In this minimal scenario, the light scalar singlet $S$ mixes with the Standard Model (SM) Higgs boson $h$. The highly boosted $S$ particles are produced in the GRB and then undergo the radiative decay di-photon $S\rightarrow γγ$ while propagating to Earth. The resulting photons may thus be produced at a remote region without being nullified by the EBL. Hence, the usual exponential reduction of $γ$-rays is lifted due to an attenuation that is inverse in the optical depth, which becomes much larger due to the scalar carriers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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