Zobrazeno 1 - 10
of 174
pro vyhledávání: '"Mark Trodden"'
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 8, Pp 1-18 (2022)
Abstract We explore extensions of the double copy to massive theories and find a new cubic theory with a local double copy. We consider the nonlinear sigma model and the special galileon theory, massless versions of which are known to be related thro
Externí odkaz:
https://doaj.org/article/14bca6d2da044001bdd424a496c8752f
Autor:
Lasha Berezhiani, Mark Trodden
Publikováno v:
Physics Letters B, Vol 840, Iss , Pp 137852- (2023)
The possibility of the resilience of the beginning of inflation under unfavourable conditions is examined by considering the initial state of the inflaton field to be in the form of a relativistic gas with some of its properties in close proximity to
Externí odkaz:
https://doaj.org/article/22df68dbef374359b3d9139f0d2202e3
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-71 (2019)
Abstract If the graviton is the only high spin particle present during inflation, then the form of the observable tensor three-point function is fixed by de Sitter symmetry at leading order in slow-roll, regardless of the theory, to be a linear combi
Externí odkaz:
https://doaj.org/article/92e4b896d86640f4a1d98de4ac27b84f
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 11, Pp 1-25 (2018)
Abstract The double copy procedure relates gauge and gravity theories through color-kinematics replacements, and holds for both scattering amplitudes and in classical contexts. Moreover, it has been shown that there is a web of theories whose scatter
Externí odkaz:
https://doaj.org/article/f0fc28b220264b05b088ddc800b1702a
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 4, Pp 1-26 (2018)
Abstract The classical double copy procedure relates classical asymptotically-flat gravitational field solutions to Yang-Mills and scalar field solutions living in Minkowski space. In this paper we extend this correspondence to maximally symmetric cu
Externí odkaz:
https://doaj.org/article/7653b8b42e1149388c9846458dd6c9ce
Autor:
Jeremy Sakstein, Mark Trodden
Publikováno v:
Physics Letters B, Vol 774, Iss C, Pp 183-188 (2017)
We put forward a new proposal for generating the baryon asymmetry of the universe by making use of the dynamics of a U(1) scalar field coupled to dark matter. High dark matter densities cause the U(1) symmetry to break spontaneously so that the field
Externí odkaz:
https://doaj.org/article/bd246c282038456c9987d5808527c642
Publikováno v:
Physics Letters B, Vol 797, Iss , Pp - (2019)
We investigate the extent to which quintessence models for dark energy are fine-tuned in the context of recent swampland conjectures. In particular, the issue is whether there is a double fine-tuning in which both V and |∇V| are fine-tuned, or whet
Externí odkaz:
https://doaj.org/article/4373218abaab431dac50819af7299261
Autor:
Michael Koehn, Mark Trodden
Publikováno v:
Physics Letters B, Vol 755, Iss , Pp 498-503 (2016)
In supersymmetric theories, topological defects can have nontrivial behaviors determined purely by whether or not supersymmetry is restored in the defect core. A well-known example of this is that some supersymmetric cosmic strings are automatically
Externí odkaz:
https://doaj.org/article/d21a8482fd1342b18f7b848064a4b7e6
Autor:
Lasha Berezhiani, Mark Trodden
Publikováno v:
Physics Letters B, Vol 749, Iss C, Pp 425-430 (2015)
We propose an intuitive framework for studying the problem of initial conditions in slow-roll inflation. In particular, we consider a universe at high, but sub-Planckian energy density and analyze the circumstances under which it is plausible for it
Externí odkaz:
https://doaj.org/article/04f73fbf56224b44a3230f9ac34446bf
Publikováno v:
Physical Review
Conformal symmetry can be spontaneously broken due to the presence of a defect or other background, which gives a symmetry-breaking vacuum expectation value (VEV) to some scalar operators. We study the effective field theory of fluctuations around th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b5a4a16644f8a3da549fdfe0848d578
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