Stochastic axion scenario
Stochastic axion scenario
复制标题
随机轴子场景
作者：
P. Graham;Adam Scherlis
对于最小QCD轴子模型，一般认为暗物质的过度产生会限制轴子质量超过某个阈值，或者至少如果质量低于该阈值，则必须调整初始失准角。我们证明这是不正确的。在暴胀期间，如果哈勃尺度很低，轴子会趋向于平衡。这意味着最小的QCD轴子可以自然地给出整个质量范围较低部分的暗物质丰度，低至质量为10 ^{-12}$eV（或$f_a $直到几乎普朗克尺度）。轴子丰度是由膨胀期间场的量子涨落产生的。这种机制产生冷暗物质，等曲率扰动可以忽略不计。除了QCD轴子之外，这种机制还可以产生宇宙学上丰富的类轴子粒子和其他光场。
For the minimal QCD axion model it is generally believed that overproduction of dark matter constrains the axion mass to be above a certain threshold, or at least that the initial misalignment angle must be tuned if the mass is below that threshold. We demonstrate that this is incorrect. During inflation, if the Hubble scale is low, the axion tends toward an equilibrium. This means the minimal QCD axion can naturally give the observed dark matter abundance in the entire lower part of the mass range, down to masses $sim 10^{-12}$ eV (or $f_a$ up to almost the Planck scale). The axion abundance is generated by quantum fluctuations of the field during inflation. This mechanism generates cold dark matter with negligible isocurvature perturbations. In addition to the QCD axion, this mechanism can also generate a cosmological abundance of axion-like particles and other light fields.
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影响因子：
5
作者：
Keck Array;BICEP2 Collaborations P. A. R. Ade;Z. Ahmed;R. Aikin;K. Alexander;D. Barkats;S. Benton;C. Bischoff;J. Bock;R. Bowens-Rubin;J. Brevik;I. Buder;E. Bullock;V. Buza;J. Connors;B. Crill;L. Duband;C. Dvorkin;J. Filippini;S. Fliescher;T. S. Germaine;T. Ghosh;J. Grayson;S. Harrison;S. Hildebrandt;G. Hilton;H. Hui;K. Irwin;J. Kang;K. Karkare;E. Karpel;J. Kaufman;B. Keating;S. Kefeli;S. Kernasovskiy;J. Kovac;C. Kuo;N. Larsen;E. Leitch;K. Megerian;L. Moncelsi;T. Namikawa;C. Netterfield;H. Nguyen;R. O’Brient;IV R.W.Ogburn;C. Pryke;S. Richter;A. Schillaci;R. Schwarz;C. Sheehy;Z. Staniszewski;B. Steinbach;R. Sudiwala;G. Teply;K. Thompson;J. Tolan;C. Tucker;A. Turner;A. Vieregg;A. Weber;D. Wiebe;J. Willmert;C. L. Wong;W. L. K. Wu;K. Yoon
通讯作者：
Keck Array;BICEP2 Collaborations P. A. R. Ade;Z. Ahmed;R. Aikin;K. Alexander;D. Barkats;S. Benton;C. Bischoff;J. Bock;R. Bowens-Rubin;J. Brevik;I. Buder;E. Bullock;V. Buza;J. Connors;B. Crill;L. Duband;C. Dvorkin;J. Filippini;S. Fliescher;T. S. Germaine;T. Ghosh;J. Grayson;S. Harrison;S. Hildebrandt;G. Hilton;H. Hui;K. Irwin;J. Kang;K. Karkare;E. Karpel;J. Kaufman;B. Keating;S. Kefeli;S. Kernasovskiy;J. Kovac;C. Kuo;N. Larsen;E. Leitch;K. Megerian;L. Moncelsi;T. Namikawa;C. Netterfield;H. Nguyen;R. O’Brient;IV R.W.Ogburn;C. Pryke;S. Richter;A. Schillaci;R. Schwarz;C. Sheehy;Z. Staniszewski;B. Steinbach;R. Sudiwala;G. Teply;K. Thompson;J. Tolan;C. Tucker;A. Turner;A. Vieregg;A. Weber;D. Wiebe;J. Willmert;C. L. Wong;W. L. K. Wu;K. Yoon
影响因子：
5
作者：
L. Zhong;S. Al Kenany;K. Backes;B. Brubaker;S. Cahn;G. Carosi;Y. Gurevich;W. Kindel;S. Lamoreaux;K. Lehnert;S. Lewis;M. Malnou;R. Maruyama;D. Palken;N. Rapidis;J. Root;M. Simanovskaia;T. Shokair;D. Speller;I. Urdinaran;K. Van Bibber
通讯作者：
L. Zhong;S. Al Kenany;K. Backes;B. Brubaker;S. Cahn;G. Carosi;Y. Gurevich;W. Kindel;S. Lamoreaux;K. Lehnert;S. Lewis;M. Malnou;R. Maruyama;D. Palken;N. Rapidis;J. Root;M. Simanovskaia;T. Shokair;D. Speller;I. Urdinaran;K. Van Bibber
通货膨胀导致多个观众凝结
影响因子：
6.4
作者：
Hardwick R
通讯作者：
Hardwick R
影响因子：
19.6
作者：
Anastassopoulos, V.;Aune, S.;Zioutas, K.
通讯作者：
Zioutas, K.
影响因子：
6.7
作者：
Garcon, Antoine;Aybas, Deniz;Budker, Dmitry
通讯作者：
Budker, Dmitry