Supernova Constraints on Massive (Pseudo)Scalar Coupling to Neutrinos

Lucien Heurtier; Yongchao Zhang

doi:10.1088/1475-7516/2017/02/042

paper

Supernova Constraints on Massive (Pseudo)Scalar Coupling to Neutrinos

arXiv:1609.05882 · doi:10.1088/1475-7516/2017/02/042

Abstract

In this paper we derive constraints on the emission of a massive (pseudo)scalar $S$ from annihilation of neutrinos in the core of supernovae through the dimension-4 coupling $ν ν S$ , as well as the effective dimension-5 operator $\frac{1}{Λ} (ν ν) (S S)$ . While most of earlier studies have focused on massless or ultralight scalars, our analysis involves scalar with masses of order $eV - GeV$ which can be copiously produced during the explosion of supernovae, whose core temperature is generally of order $T \sim O (10)$ MeV. From the luminosity and deleptonization arguments regarding the observation of SN1987A, we exclude a large range of couplings $1 0^{- 12} ≲ ∣ g_{α β} ∣ ≲ 1 0^{- 5}$ for the dimension-4 case, depending on the neutrino flavours involved and the scalar mass. In the case of dimension-5 operator, for a scalar mass from MeV to 100 MeV the coupling $h_{α β}$ get constrained from $1 0^{- 6}$ to $1 0^{- 2}$ , with the cutoff scale explicitly set $Λ = 1$ TeV. We finally show that if the neutrino burst of a nearby supernova explosion is detected by Super-Kamiokande and IceCube, the constraints will be largely reinforced.

arXiv comment17 pages, 4 figures, version to appear in JCAP

Supernova Constraints on Massive (Pseudo)Scalar Coupling to Neutrinos

Abstract

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