Gravitational Waves from the Big Bang - Inflation in String Theory after BICEP2
BICEP2 from Antarctica has given us the first clear evidence for primordial gravitational waves causing B-mode polarization at degree angular scales $\ell < 100$. If interpreted in the context of inflation, their signal corresponds to a tensor-to-scalar ratio $r=0.16^{+0.06}_{-0.05}$, which disfa...
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ftdesyvdb:oai:bib-pubdb1.desy.de:172335 2023-05-15T13:42:47+02:00 Gravitational Waves from the Big Bang - Inflation in String Theory after BICEP2 Westphal, Alexander DE 2014 https://bib-pubdb1.desy.de/record/172335 https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03685%22 eng eng https://bib-pubdb1.desy.de/record/172335 https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03685%22 info:eu-repo/semantics/openAccess info:eu-repo/semantics/other info:eu-repo/semantics/publishedVersion 2014 ftdesyvdb 2022-06-30T20:11:24Z BICEP2 from Antarctica has given us the first clear evidence for primordial gravitational waves causing B-mode polarization at degree angular scales $\ell < 100$. If interpreted in the context of inflation, their signal corresponds to a tensor-to-scalar ratio $r=0.16^{+0.06}_{-0.05}$, which disfavors $r<0.01$ at about $5\sigma$. We will discuss the implications of this result for models of single-field slow-roll inflation. Due to the Lyth bound, the new data represent strong evidence against virtually all small-field models of inflation. We will discuss the need for protective symmetries such as shift symmetries in large-field inflation models which are now favored, and review the situation of string inflation and its large-field version of (axion) monodromy. Other/Unknown Material Antarc* Antarctica DESY Publication Database (PUBDB) |
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DESY Publication Database (PUBDB) |
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English |
description |
BICEP2 from Antarctica has given us the first clear evidence for primordial gravitational waves causing B-mode polarization at degree angular scales $\ell < 100$. If interpreted in the context of inflation, their signal corresponds to a tensor-to-scalar ratio $r=0.16^{+0.06}_{-0.05}$, which disfavors $r<0.01$ at about $5\sigma$. We will discuss the implications of this result for models of single-field slow-roll inflation. Due to the Lyth bound, the new data represent strong evidence against virtually all small-field models of inflation. We will discuss the need for protective symmetries such as shift symmetries in large-field inflation models which are now favored, and review the situation of string inflation and its large-field version of (axion) monodromy. |
format |
Other/Unknown Material |
author |
Westphal, Alexander |
spellingShingle |
Westphal, Alexander Gravitational Waves from the Big Bang - Inflation in String Theory after BICEP2 |
author_facet |
Westphal, Alexander |
author_sort |
Westphal, Alexander |
title |
Gravitational Waves from the Big Bang - Inflation in String Theory after BICEP2 |
title_short |
Gravitational Waves from the Big Bang - Inflation in String Theory after BICEP2 |
title_full |
Gravitational Waves from the Big Bang - Inflation in String Theory after BICEP2 |
title_fullStr |
Gravitational Waves from the Big Bang - Inflation in String Theory after BICEP2 |
title_full_unstemmed |
Gravitational Waves from the Big Bang - Inflation in String Theory after BICEP2 |
title_sort |
gravitational waves from the big bang - inflation in string theory after bicep2 |
publishDate |
2014 |
url |
https://bib-pubdb1.desy.de/record/172335 https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03685%22 |
op_coverage |
DE |
genre |
Antarc* Antarctica |
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Antarc* Antarctica |
op_relation |
https://bib-pubdb1.desy.de/record/172335 https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-03685%22 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766172769053048832 |