Time-dependent quark masses and big bang nucleosynthesis revisited

被引：21

作者：

Cheoun, Myung-Ki ^{[1
]}

Kajino, Toshitaka ^{[2
,3
,4
]}

Kusakabe, Motohiko ^{[5
]}

Mathews, Grant J. ^{[6
,7
]}

机构：

[1] Soongsil Univ, Dept Phys, Seoul 156743, South Korea

[2] Natl Astron Observ Japan, Div Theoret Astron, Tokyo 1818588, Japan

[3] Univ Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan

[4] Grad Univ Adv Studies, Dept Astron Sci, Tokyo 1818588, Japan

[5] Univ Tokyo, Inst Cosm Ray Res, Chiba 2778582, Japan

[6] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[7] Univ Notre Dame, Ctr Astrophys, Notre Dame, IN 46556 USA

来源：

PHYSICAL REVIEW D | 2011年 / 84卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

FUNDAMENTAL CONSTANTS; WMAP; DEUTERIUM; ABUNDANCE; EVOLUTION; LITHIUM; HE-3;

D O I：

10.1103/PhysRevD.84.043001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We reinvestigate the constraints from primordial nucleosynthesis on a possible time-dependent quark mass. The limits on such quark-mass variations are particularly sensitive to the adopted observational abundance constraints. Hence, in the present study we have considered updated light-element abundances and uncertainties deduced from observations. We also consider new nuclear reaction rates and an independent analysis of the influence of such quark-mass variations on the resonance properties of the important He-3(d; p)He-4 reaction. We find that the updated abundance and resonance constraints imply a narrower range on the possible quark-mass variations in the early universe. We also find that, contrary to previous investigations, the optimum concordance region reduces to a (95% C. L.) value of -0.005 less than or similar to delta m(q)/m(q) less than or similar to 0.007 consistent with no variation in the averaged quark mass.

引用

页数：8

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