QCD Axion Dark Matter with a Small Decay Constant.
| Autor: | Co RT; Leinweber Center for Theoretical Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.; Department of Physics, University of California, Berkeley, California 94720, USA.; Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Hall LJ; Department of Physics, University of California, Berkeley, California 94720, USA.; Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Harigaya K; Department of Physics, University of California, Berkeley, California 94720, USA.; Theoretical Physics Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. |
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| Jazyk: | angličtina |
| Zdroj: | Physical review letters [Phys Rev Lett] 2018 May 25; Vol. 120 (21), pp. 211602. |
| DOI: | 10.1103/PhysRevLett.120.211602 |
| Abstrakt: | The QCD axion is a good dark matter candidate. The observed dark matter abundance can arise from misalignment or defect mechanisms, which generically require an axion decay constant f_{a}∼O(10^{11}) GeV (or higher). We introduce a new cosmological origin for axion dark matter, parametric resonance from oscillations of the Peccei-Quinn symmetry breaking field, that requires f_{a}∼(10^{8}-10^{11}) GeV. The axions may be warm enough to give deviations from cold dark matter in large scale structure. |
| Databáze: | MEDLINE |
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