Charm contribution to ultrahigh-energy neutrinos from newborn magnetars
Charm contribution to ultrahigh-energy neutrinos from newborn magnetars
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DOI：
10.1103/physrevd.102.103001
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发表时间：
2020-07
影响因子：
5
通讯作者：
J. Carpio;K. Murase;M. Reno;I. Sarcevic;A. Staśto
中科院分区：
文献类型：
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作者：
J. Carpio;K. Murase;M. Reno;I. Sarcevic;A. Staśto
新生的强磁化中子星（所谓磁星）被它们的恒星或合并喷出物所包围，预计将通过质子强子相互作用产生的介子衰变成为超高能中微子的来源，质子通过\km{磁}耗散自旋下降能量而加速到100万能量。我们发现，不仅π介子和K介子，但也魅力强子，这是通常被忽视的，由于其小的生产截面，可以代表占主导地位的贡献中微子注量在中微子能量，因为它们的寿命短，而超高能中微子注量从π介子和K介子生产被抑制在早期，由于其显着的冷却前衰变。我们表明，下一代探测器，如极端多信使天体物理探测器（POEMMA），用于神经元探测的巨型射电阵列（GRAND）和IceCube-Gen 2有很好的机会观测中微子，主要来自附近的磁星的粲强子。我们还表明，来自附近磁星驱动的合并新星的中微子可以在10^2 $ s和10^3 $ s之间的时间间隔内被观测到，其中粲强子的贡献对于中微子能量超过10^8 $ GeV是占主导地位的，这与下一代探测器有关。我们还评论的魅力强子的贡献扩散中微子通量的潜在影响。
Newborn, strongly magnetized neutron stars (so-called magnetars) surrounded by their stellar or merger ejecta are expected to be sources of ultrahigh-energy neutrinos via decay of mesons produced in hadronic interactions of protons which are accelerated to ultrahigh energies by \km{magnetic} dissipation of the spindown energy. We show that not only pions and kaons but also charm hadrons, which are typically neglected due to their small production cross sections, can represent dominant contributions to neutrino fluence at ultrahigh energies, because of their short lifetimes, while the ultrahigh-energy neutrino fluence from pion and kaon production is suppressed at early times due to their significant cooling before their decay. We show that the next-generation detectors such as Probe Of Extreme Multi-Messenger Astrophysics (POEMMA), Giant Radio Array for Neurtino Detection (GRAND) and IceCube-Gen2 have a good chance of observing neutrinos, primarily originating from charm hadrons, from nearby magnetars. We also show that neutrinos from nearby magnetar-driven merger novae could be observed in the time interval between $10^2$ s and $10^3$ s, where the charm hadron contribution is dominant for neutrino energies above $10^8$ GeV, of relevance to next generation detectors. We also comment on potential impacts of the charm hadron contribution to the diffuse neutrino flux.