Hadronic decay of late-decaying particles and big-bang nucleosynthesis

被引：363

作者：

Kawasaki, M ^{[1
]}

Kohri, K

Moroi, T

机构：

[1] Univ Tokyo, Grad Sch Sci, Res Ctr Early Universe, Tokyo 1130033, Japan

[2] Osaka Univ, Dept Earth & Space Sci, Osaka 5600043, Japan

[3] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

来源：

PHYSICS LETTERS B | 2005年 / 625卷 / 1-2期

关键词：

D O I：

10.1016/j.physletb.2005.08.045

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the big-bang nucleosynthesis (BBN) scenario with late-decaying exotic particles with lifetime longer than similar to 1 s. With a late-decaying particle in the early universe, predictions of the standard BBN scenario can be significantly altered. Therefore, we derive constraints on its primordial abundance. We pay particular attention to hadronic decay modes of such particles. We see that the non-thermal production process of D, He-3 and Li-6 provides a stringent upper bound on the primordial abundance of late-decaying particles with hadronic branching ratio. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：7 / 12

页数：6

共 23 条

[21] HIGH-ENERGY-PHYSICS EVENT GENERATION WITH PYTHIA-5.7 AND JETSET-7.4 [J].

SJOSTRAND, T .

COMPUTER PHYSICS COMMUNICATIONS, 1994, 82 (01) :74-89

[22] THE LI-6/LI-7 RATIO IN THE METAL-POOR HALO DWARFS HD-19445 AND HD-84937 [J].

SMITH, VV ;

LAMBERT, DL ;

NISSEN, PE .

ASTROPHYSICAL JOURNAL, 1993, 408 (01) :262-276

[23] First-year Wilkinson Microwave Anisotropy Probe (WMAP) observations:: Determination of cosmological parameters [J].

Spergel, DN ;

Verde, L ;

Peiris, HV ;

Komatsu, E ;

Nolta, MR ;

Bennett, CL ;

Halpern, M ;

Hinshaw, G ;

Jarosik, N ;

Kogut, A ;

Limon, M ;

Meyer, SS ;

Page, L ;

Tucker, GS ;

Weiland, JL ;

Wollack, E ;

Wright, EL .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2003, 148 (01) :175-194

← 1 2 3 →