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arXiv 0904.0138hep-phastro-ph.HEgr-qc
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磁化伽马射线暴火球中的中微子振荡

Neutrino Oscillation in Magnetized Gamma-Ray Burst Fireball

Sarira Sahu, Nissim Fraija, Yong-Yeon Keum

摘要:

能量约为5-20 MeV的中微子是由于恒星坍缩或合并事件而产生的,这些事件触发了伽马射线暴。由于电子正电子湮没和核子韧致辐射,火球内也产生低能MeV的中微子。这些中微子中的许多将通过火球的致密和相对论性磁化等离子体传播。我们利用SNO、SuperKamiokande和液体闪烁探测器的中微子振荡参数研究了$ν_e\leftrightarrow ν_{μ,τ}$共振振荡的可能性。利用共振条件,我们计算了这些中微子的共振长度,并在假设火球半径为100 Km的基础上,估计了火球的轻子不对称性和重子载荷等观测量。

英文摘要:

Neutrinos of energy about 5-20 MeV are produced due to the stellar collapse or merger events that trigger the Gamma-Ray Burst. Also low energy MeV neutrinos are produced within the fireball due to electron positron annihilation and nucleonic bremsstrahlung. Many of these neutrinos will propagate through the dense and relativistic magnetized plasma of the fireball. We have studied the possibility of resonant oscillation of $ν_e\leftrightarrow ν_{μ,τ}$ by taking into account the neutrino oscillation parameters from SNO, SuperKamiokande and Liquid Scintillator Detector. Using the resonance condition we have calculated the resonance length for these neutrinos and also the fireball observables like lepton asymmetry and the baryon load are estimated based on the assumed fireball radius of 100 Km.

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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