期刊
PHYSICAL REVIEW D
卷 93, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.93.123503
关键词
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资金
- STFC studentship
- Advanced Research Fellowship at the University of Nottingham
- Royal Society University Research Fellowship
- STFC Consolidated Grant [ST/L000393/1]
- STFC [ST/L000393/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/L000393/1, 1367092] Funding Source: researchfish
We present the first complete Markov chain Monte Carlo analysis of cosmological models with evolving cosmic (super) string networks, using the unconnected segment model in the unequal-time correlator formalism. For ordinary cosmic string networks, we derive joint constraints on. cold dark matter (CDM) and string network parameters, namely the string tension G mu, the loop-chopping efficiency c(r), and the string wiggliness alpha. For cosmic superstrings, we obtain joint constraints on the fundamental string tension G mu(F), the string coupling g(s), the self-interaction coefficient c(s), and the volume of compact extra dimensions w. This constitutes the most comprehensive CMB analysis of Lambda CDM cosmology + strings to date. For ordinary cosmic string networks our updated constraint on the string tension, obtained using Planck2015 temperature and polarization data, is G mu < 1.1 x 10(-7) in relativistic units, while for cosmic superstrings our constraint on the fundamental string tension after marginalizing over g(s), c(s), and w is G mu(F) < 2.8 x 10(-8).
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