The alp miracle : unified inflaton and dark matter
文献类型：期刊论文
| 作者 | Daido, Ryuji1; Takahashi, Fuminobu1,2; Yin, Wen3 |
| 刊名 | Journal of cosmology and astroparticle physics
 |
| 出版日期 | 2017-05-01 |
| 期号 | 5页码:29 |
| 关键词 | Axions Dark matter theory Inflation Particle physics - cosmology connection |
| ISSN号 | 1475-7516 |
| DOI | 10.1088/1475-7516/2017/05/044 |
| 通讯作者 | Daido, ryuji(daido@tuhep.phys.ac.jp) |
| 英文摘要 | We propose a scenario where both inflation and dark matter are described by a single axion-like particle (alp) in a unified manner. in a class of the minimal axion hilltop inflation, the effective masses at the maximum and mimimum of the potential have equal magnitude but opposite sign, so that the alp inflaton is light both during inflation and in the true vacuum. after inflation, most of the alps decay and evaporate into plasma through a coupling to photons, and the remaining ones become dark matter. we find that the observed cmb and matter power spectrum as well as the dark matter abundance point to an alp of mass m(phi) = o(0.01) ev and the axion-photon coupling g(phi gamma gamma) = o(10(-11)) gev-1 : the alp miracle. the suggested parameter region is within the reach of the next generation axion helioscope, iaxo, and high-intensity laser experiments in the future. furthermore, thermalized alps contribute to hot dark matter and its abundance is given in terms of the effective number of extra neutrino species, delta n-eff similar or equal to 0.03, which can be tested by the future cmb and bao observations. we also discuss a case with multiple alps, where the coupling to photons can be enhanced in the early universe by an order of magnitude or more, which enlarges the parameter space for the alp miracle. the heavy alp plays a role of the waterfall field in hybrid inflation, and reheats the universe, and it can be searched for in various experiments such as ship. |
| WOS关键词 | MULTI-NATURAL INFLATION ; NAMBU-GOLDSTONE BOSONS ; LARGE-SCALE STRUCTURE ; AXION LANDSCAPE ; SUPERGRAVITY ; CONSTRAINTS ; UNIVERSE ; PLANCK ; MODELS ; FIELDS |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000402878200044 |
| 出版者 | IOP PUBLISHING LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177399 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Daido, Ryuji |
| 作者单位 | 1.Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan 2.Univ Tokyo, UTIAS, Kavli IPMU WPI, Kashiwa, Chiba 2778583, Japan 3.Chinese Acad Sci, IHEP, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Daido, Ryuji,Takahashi, Fuminobu,Yin, Wen. The alp miracle : unified inflaton and dark matter[J]. Journal of cosmology and astroparticle physics,2017(5):29. |
| APA | Daido, Ryuji,Takahashi, Fuminobu,&Yin, Wen.(2017).The alp miracle : unified inflaton and dark matter.Journal of cosmology and astroparticle physics(5),29. |
| MLA | Daido, Ryuji,et al."The alp miracle : unified inflaton and dark matter".Journal of cosmology and astroparticle physics .5(2017):29. |
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来源：高能物理研究所
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