Percolating cosmic string networks from kination
We describe a new mechanism, whose ingredients are realised in string compactifications, for the formation of cosmic (super)string networks. Oscillating string loops grow when their tension µ decreases with time. If 2H + ˙µ/µ < 0, where H is the Hubble parameter, loops grow faster than the scale...
| Hlavní autoři: | , , , |
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| Médium: | Journal article |
| Jazyk: | English |
| Vydáno: |
American Physical Society
2024
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| _version_ | 1826315123318325248 |
|---|---|
| author | Conlon, JP Copeland, EJ Hardy, E Sánchez González, N |
| author_facet | Conlon, JP Copeland, EJ Hardy, E Sánchez González, N |
| author_sort | Conlon, JP |
| collection | OXFORD |
| description | We describe a new mechanism, whose ingredients are realised in string compactifications, for the
formation of cosmic (super)string networks. Oscillating string loops grow when their tension µ
decreases with time. If 2H + ˙µ/µ < 0, where H is the Hubble parameter, loops grow faster than the
scale factor and an initial population of isolated small loops (for example, produced by nucleation)
can grow, percolate and form a network. This condition is satisfied for fundamental strings in the
background of a kinating volume modulus rolling towards the asymptotic large volume region of
moduli space. Such long kination epochs are motivated in string cosmology by both the electroweak
hierarchy problem and the need to solve the overshoot problem. The tension of such a network
today is set by the final vacuum; for phenomenologically appealing Large Volume Scenario (LVS)
vacua, this would lead to a fundamental string network with Gµ ∼ 10−10. |
| first_indexed | 2024-12-09T03:20:12Z |
| format | Journal article |
| id | oxford-uuid:586d5932-e77b-43e8-ba3c-8ad40ebb70a0 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-12-09T03:20:12Z |
| publishDate | 2024 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:586d5932-e77b-43e8-ba3c-8ad40ebb70a02024-11-08T07:41:28ZPercolating cosmic string networks from kinationJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:586d5932-e77b-43e8-ba3c-8ad40ebb70a0EnglishSymplectic ElementsAmerican Physical Society2024Conlon, JPCopeland, EJHardy, ESánchez González, NWe describe a new mechanism, whose ingredients are realised in string compactifications, for the formation of cosmic (super)string networks. Oscillating string loops grow when their tension µ decreases with time. If 2H + ˙µ/µ < 0, where H is the Hubble parameter, loops grow faster than the scale factor and an initial population of isolated small loops (for example, produced by nucleation) can grow, percolate and form a network. This condition is satisfied for fundamental strings in the background of a kinating volume modulus rolling towards the asymptotic large volume region of moduli space. Such long kination epochs are motivated in string cosmology by both the electroweak hierarchy problem and the need to solve the overshoot problem. The tension of such a network today is set by the final vacuum; for phenomenologically appealing Large Volume Scenario (LVS) vacua, this would lead to a fundamental string network with Gµ ∼ 10−10. |
| spellingShingle | Conlon, JP Copeland, EJ Hardy, E Sánchez González, N Percolating cosmic string networks from kination |
| title | Percolating cosmic string networks from kination |
| title_full | Percolating cosmic string networks from kination |
| title_fullStr | Percolating cosmic string networks from kination |
| title_full_unstemmed | Percolating cosmic string networks from kination |
| title_short | Percolating cosmic string networks from kination |
| title_sort | percolating cosmic string networks from kination |
| work_keys_str_mv | AT conlonjp percolatingcosmicstringnetworksfromkination AT copelandej percolatingcosmicstringnetworksfromkination AT hardye percolatingcosmicstringnetworksfromkination AT sanchezgonzalezn percolatingcosmicstringnetworksfromkination |