TY - JOUR
T1 - Effect of neutrino heating on primordial nucleosynthesis
AU - Fields, Brian D.
AU - Dodelson, Scott
AU - Turner, Michael S.
PY - 1993/1/1
Y1 - 1993/1/1
N2 - We modify the standard code for primordial nucleosynthesis to include the effect of the slight heating of neutrinos by e± annihilations. There is a small, systematic change in the He4 yield, ΔY+1.5×10-4, which is insensitive to the value of the baryon-to-photon ratio η for 10-10 η 10-9. We also find that the baryon-to-photon ratio decreases by about 0.5% less than the canonical factor of 411 because some of the entropy in e± pairs is transferred to neutrinos. These results are in accord with recent analytical estimates.
AB - We modify the standard code for primordial nucleosynthesis to include the effect of the slight heating of neutrinos by e± annihilations. There is a small, systematic change in the He4 yield, ΔY+1.5×10-4, which is insensitive to the value of the baryon-to-photon ratio η for 10-10 η 10-9. We also find that the baryon-to-photon ratio decreases by about 0.5% less than the canonical factor of 411 because some of the entropy in e± pairs is transferred to neutrinos. These results are in accord with recent analytical estimates.
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U2 - 10.1103/PhysRevD.47.4309
DO - 10.1103/PhysRevD.47.4309
M3 - Article
AN - SCOPUS:0000633883
VL - 47
SP - 4309
EP - 4314
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 10
ER -