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arXiv 1808.08158hep-ph
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Majoron暗物质及对Majoron-中微子耦合的约束

Majoron Dark Matter and Constraints on the Majoron-Neutrino Coupling

Tim Brune, Heinrich Päs

摘要:

我们重新审视了一个单重Majoron模型,其中中微子质量来自轻子数的自发破坏。如果Majoron获得MeV量级的质量,它就可以扮演暗物质的角色。我们讨论的约束条件的大规模的Majoron与质量的顺序MeV中微子的超新星数据的耦合。在致密的超新星核心中,允许发射Majoron的中微子湮灭,并且可以改变超新星的信号。基于对SN 1987 A的观测,我们从光度和去质子化参数中排除了大范围的耦合,并考虑了背景介质的影响。如果Majoron质量不超过实验的Q值,中微子-Majoron耦合允许无中微子双β衰变和Majoron发射。我们推导出的相空间的抑制和减少的信号背景比,由于Majoron质量的基础上的耦合为兆电子伏的Majoron质量的约束。天体物理学和实验室实验的限制相结合,排除了大范围的中微子-马约伦耦合的质量范围内的利益为马约伦暗物质。

英文摘要:

We revisit a singlet Majoron model in which neutrino masses arise from the spontaneous violation of lepton number. If the Majoron obtains a mass of order MeV, it can play the role of dark matter. We discuss constraints on the couplings of the massive Majoron with masses of order MeV to neutrinos from supernova data. In the dense supernova core, Majoron-emitting neutrino annihilations are allowed and can change the signal of a supernova. Based on the observation of SN1987A, we exclude a large range of couplings from the luminosity and the deleptonization arguments, taking the effect of the background medium into account. If the Majoron mass does not exceed the Q-value of the experiment, the neutrino-Majoron couplings allow for neutrinoless double beta decay with Majoron emission. We derive constraints on the couplings for a Majoron mass of order MeV based on the phase space suppression and the diminishing signal-to-background ratio due to the Majoron mass. The combination of constraints from astrophysics and laboratory experiments excludes a large range of neutrino-Majoron couplings in the mass range of intererest for Majoron dark matter.

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