Extremely long-lived charged massive particles as a probe for reheating of the Universe

Extremely long-lived charged massive particles as a probe for reheating of the Universe
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寿命极长的带电大质量粒子作为宇宙再加热的探针

DOI:
10.1103/physrevd.77.116003
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发表时间:
2007
期刊:
影响因子:
5
通讯作者:
F. Takayama
F. Takayama
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
F. Takayama

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我们讨论了带电大质量粒子大爆炸的影响 核合成(CBBN)探索宇宙重新升温的本质 一种新的极长寿命带电质量粒子(CHAMP) 是存在的。如果冠军的质量在对撞机的触手可及范围内,它的寿命是 超过10^4$秒,CBBN预测与观测之间的比较 $^6$Li丰度可能表明早期宇宙中的非标准再热 而不依赖于衰变特性的细节。即使冠军弥撒是 在对撞机无法触及的范围之外,宇宙学的考虑可能会提供一个 这不是无关紧要的线索,暗示着存在如此沉重的、长寿的来自 如果子粒子是宇宙末期的主要成分 现在的暗物质。我们认为一个低再加热温度模型是一个 非标准重新加热方案的示例。
We discuss the impact of charged massive particle big bang nucleosynthesis(CBBN) to explore the nature of the reheating of the Universe in the case that a new extremely long-lived charged massive particle(CHAMP) exists. If the mass of the CHAMP is within collider reach and it's lifetime is longer than $10^4$sec, the comparison between the CBBN prediction and observed $^6$Li abundances may indicate nonstandard reheating in the early Universe without relying on details of the decay properties. Even if the CHAMP mass is outside the reach of colliders, the cosmological considerations may provide a nontrivial hint for the existence of such very heavy long-lived CHAMPs from the late Universe if the daughter particles are the dominant component of the present dark matter. We consider a low reheating temperature model as an example of the nonstandard reheating scenarios.
DOI: 10.1088/1475-7516/2006/09/001
发表时间: 2006-05
影响因子: 6.4
作者:
F. Steffen
通讯作者: F. Steffen
DOI: 10.1103/physrevd.70.115007
发表时间: 2004-09
期刊: Physical Review D
影响因子: 5
作者:
K. Hamaguchi;Y. Kuno;T. Nakaya;M. Nojiri
通讯作者: K. Hamaguchi;Y. Kuno;T. Nakaya;M. Nojiri
对撞机的超重力
DOI: --
发表时间: 2004
期刊: Phys. Lett. B 588
影响因子: --
作者:
T.;Sakai;S.;Sugimoto;M.Ibe;M.Kawasaki;S.Kaneko;T.Higaki;M.Frigerio;M. Bando;M. Bando;W. Buchmuller
通讯作者: W. Buchmuller