| Autor: |
Choi, Gongjun, Jinno, Ryusuke, Yanagida, Tsutomu T. |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| DOI: |
10.3204/pubdb-2021-03036 |
| Popis: |
We study an inevitable cosmological consequence in PeV scale SUSY-breaking scenarios. We focus on the SUSY-breaking scale corresponding to the gravitino mass $m_{3/2}=100{\rm eV}-1{\rm keV}$. We argue that the presence of an early matter-dominated era and the resulting entropy production are requisite for the Universe with this gravitino mass. We infer the model-independent minimum amount of the entropy production $\Delta$ by requiring that the number of dwarf satellite galaxies $N_{\rm sat}$ in the Milky Way exceed the currently observed value, i.e. $N_{\rm sat}\gtrsim63$. This entropy production is inevitably imprinted on the primordial gravitational waves (pGWs) produced during the inflationary era. We study how the information on the value of $\Delta$ and the time of entropy production are encoded in the pGW spectrum $\Omega_{\rm GW}(f_{\rm GW})$. In the case where the future GW surveys do not see any suppression in the pGW spectrum for the frequency range $\mathcal{O}(10^{-10}){\rm Hz}\lesssim f_{\rm GW}\lesssim\mathcal{O}(10^{-5}){\rm Hz}$, our study can be used to rule out all the PeV scale SUSY-breaking scenarios. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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