Phys. Rev. Lett. 84, 3248–3251 (2000)Lithium-6: A Probe of the Early UniverseReceived 15 October 1999; published in the issue dated 10 April 2000 I consider the synthesis of 6Li due to the decay of relic particles, such as gravitinos or moduli, after the epoch of big bang nucleosynthesis. The synthesized 6Li/H ratio may be compared to 6Li/H in metal-poor stars which, in the absence of stellar depletion of 6Li, yields significantly stronger constraints on relic particle densities than the usual consideration of overproduction of 3He. Production of 6Li during such an era of nonthermal nucleosynthesis may also be regarded as a possible explanation for the relatively high 6Li/H ratios observed in metal-poor halo stars. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.3248
DOI:
10.1103/PhysRevLett.84.3248
PACS:
98.80.Ft, 25.55.-e, 26.35.+c, 26.40.+r
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.