EFFECT OF NEUTRINO HEATING ON PRIMORDIAL NUCLEOSYNTHESIS

被引：46

作者：

FIELDS, BD

DODELSON, S

TURNER, MS

机构：

[1] FERMILAB NATL ACCELERATOR LAB,NASA FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510

[2] UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637

来源：

PHYSICAL REVIEW D | 1993年 / 47卷 / 10期

关键词：

D O I：

10.1103/PhysRevD.47.4309

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 He-4 yield, DELTAY congruent-to +1.5X10(-4), which is insensitive to the value of the baryon-to-photon ratio eta for 10(-10) less than or similar to eta less than or similar to 10(-9). We also find that the baryon-to-photon ratio decreases by about 0.5% less than the canonical factor of 4/11 because some of the entropy in e+/- pairs is transferred to neutrinos. These results are in accord with recent analytical estimates.

引用

页码：4309 / 4314

页数：6

共 25 条

[1] MEASUREMENTS OF THE HE-3 ABUNDANCE IN THE INTERSTELLAR-MEDIUM [J].