New BBN limits on physics beyond the standard model from 4He
نویسندگان
چکیده
منابع مشابه
limits on Physics Beyond the Standard Model from 4 He
A recent analysis of the He abundance determined from observations of extragalactic HII regions indicates a significantly greater uncertainty for the He mass fraction. The derived value is now in line with predictions from big bang nucleosynthesis when the baryon density determined by WMAP is assumed. Based on this new analysis of He, we derive constraints on a host of particle properties which...
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ژورنال
عنوان ژورنال: Astroparticle Physics
سال: 2005
ISSN: 0927-6505
DOI: 10.1016/j.astropartphys.2005.01.005