TY - JOUR
T1 - Massive Dirac neutrinos and the SN1987A signal
AU - Gandhi, Raj
AU - Burrows, Adam
N1 - Funding Information:
This work is supportedin part by DOE grant DE-FG02-85ER40213a nd NSF grants AST87-14176a nd AST89-1434 6.
PY - 1990/8/23
Y1 - 1990/8/23
N2 - We present results of calculations which incorporate the effect of massive Dirac neutrinos in numerical models for the cooling of the neutron star associated with SN1987A. In the Weinberg-Salam standard model, minimally extended to include Dirac neutrino masses, the production of sterile (positive helicity) neutrinos via neutral-current neutrino-nucleon scattering proceeds at a rate that significantly affects the energetics of cooling. We determine the expected number of events, total energy in neutrinos and the burst duration for both Kamiokande II and Irvine-Michigan-Brookhaven detectors. Due to an increase in the cooling rate caused by sterile neutrinos, we find that for mνμ,τ= mνμ2+mντ 2≥14 keV, the expected neutrino burst is shortened t o a duration that is inconsistent with the observations reported by both detectors. The calculations incorporate the feedback effects of the cooling due to sterile neutrinos in a self-consistent manner and the mass limit obtained is found to be largely insensitive to the equation of state used.
AB - We present results of calculations which incorporate the effect of massive Dirac neutrinos in numerical models for the cooling of the neutron star associated with SN1987A. In the Weinberg-Salam standard model, minimally extended to include Dirac neutrino masses, the production of sterile (positive helicity) neutrinos via neutral-current neutrino-nucleon scattering proceeds at a rate that significantly affects the energetics of cooling. We determine the expected number of events, total energy in neutrinos and the burst duration for both Kamiokande II and Irvine-Michigan-Brookhaven detectors. Due to an increase in the cooling rate caused by sterile neutrinos, we find that for mνμ,τ= mνμ2+mντ 2≥14 keV, the expected neutrino burst is shortened t o a duration that is inconsistent with the observations reported by both detectors. The calculations incorporate the feedback effects of the cooling due to sterile neutrinos in a self-consistent manner and the mass limit obtained is found to be largely insensitive to the equation of state used.
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U2 - 10.1016/0370-2693(90)91323-4
DO - 10.1016/0370-2693(90)91323-4
M3 - Article
AN - SCOPUS:0038537913
SN - 0370-2693
VL - 246
SP - 149
EP - 155
JO - Physics Letters B
JF - Physics Letters B
IS - 1-2
ER -