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Exploring Cosmic Origins with CORE: Inflation
/ Finelli, Fabio (Bologna Observ. ; INFN, Bologna) ; Bucher, Martin (APC, Paris) ; Achúcarro, Ana (Leiden U. ; Basque U., Bilbao) ; Ballardini, Mario (Bologna U. ; Bologna Observ. ; INFN, Bologna) ; Bartolo, Nicola (Padua U. ; INFN, Padua ; Padua Observ.) ; Baumann, Daniel (Cambridge U., DAMTP ; Amsterdam U.) ; Clesse, Sébastien (Aachen, Tech. Hochsch.) ; Errard, Josquin (ILP, Paris ; Paris U., VI-VII) ; Handley, Will (Cambridge U. ; Cambridge U., KICC) ; Hindmarsh, Mark (Sussex U. ; Helsinki Inst. of Phys. ; Helsinki U.) et al.
/CORE
We forecast the scientific capabilities to improve our understanding of cosmic inflation of CORE, a proposed CMB space satellite submitted in response to the ESA fifth call for a medium-size mission opportunity. The CORE satellite will map the CMB anisotropies in temperature and polarization in 19 frequency channels spanning the range 60-600 GHz. [...]
arXiv:1612.08270.-
2018-04-05 - 100 p.
- Published in : JCAP 04 (2018) 016
Fulltext: PDF;
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Magnon Inflation: Slow Roll with Steep Potentials
/ Adshead, Peter (Illinois U., Urbana) ; Blas, Diego (CERN) ; Burgess, C.P. (McMaster U. ; Perimeter Inst. Theor. Phys.) ; Hayman, Peter (McMaster U. ; Perimeter Inst. Theor. Phys.) ; Patil, Subodh P (Geneva U.)
We find multi-scalar effective field theories (EFTs) that can achieve a slow inflationary roll despite having a scalar potential that does not satisfy the usual slow-roll condition (d V)^2 << V^2/Mp^2. They evade the usual slow-roll conditions on $V$ because their kinetic energies are dominated by single-derivative terms rather than the usual two-derivative terms. [...]
arXiv:1604.06048; CERN-TH-2016-067; CERN-TH-2016-067.-
Geneva : CERN, 2016-11-04 - 35 p.
- Published in : JCAP 11 (2016) 009
Article from SCOAP3: PDF; Fulltext: 10.1088_1475-7516_2016_11_009 - PDF; arXiv:1604.06048 - PDF; IOP Open Access article: PDF; External link: Preprint
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Relaxing the Electroweak Scale: the Role of Broken dS Symmetry
/ Patil, Subodh P. (Geneva U., Dept. Theor. Phys.) ; Schwaller, Pedro (CERN)
Recently, a novel mechanism to address the hierarchy problem has been proposed \cite{Graham:2015cka}, where the hierarchy between weak scale physics and any putative `cutoff' $M$ is translated into a parametrically large field excursion for the so-called relaxion field, driving the Higgs mass to values much less than $M$ through cosmological dynamics. In its simplest incarnation, the relaxion mechanism requires nothing beyond the standard model other than an axion (the relaxion field) and an inflaton. [...]
arXiv:1507.08649; CERN-PH-TH-2015-179; CERN-PH-TH-2015-179.-
Geneva : CERN, 2016-02-11 - 16 p.
- Published in : JHEP 02 (2016) 077
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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On the Predictiveness of Single-Field Inflationary Models
/ Burgess, C.P. (McMaster U. ; Perimeter Inst. Theor. Phys.) ; Patil, Subodh P. (CERN) ; Trott, Michael (CERN)
We re-examine the predictiveness of single-field inflationary models and discuss how an unknown UV completion can complicate determining inflationary model parameters from observations, even from precision measurements. Besides the usual naturalness issues associated with having a shallow inflationary potential, we describe another issue for inflation, namely, unknown UV physics modifies the running of Standard Model (SM) parameters and thereby introduces uncertainty into the potential inflationary predictions. [...]
arXiv:1402.1476; CERN-PH-TH-2014-024; CERN-PH-TH-2014-024.-
2014 - 31 p.
- Published in : JHEP 06 (2014) 010
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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Cosmological Perturbations Across an S-brane
/ Brandenberger, Robert H. (McGill U.) ; Kounnas, Costas (Ecole Normale Superieure) ; Partouche, Hervé (Ecole Polytechnique, CPHT) ; Patil, Subodh P. (CERN) ; Toumbas, N. (Cyprus U.)
Space-filling S-branes can mediate a transition between a contracting and an expanding universe in the Einstein frame. Following up on previous work that uncovered such bouncing solutions in the context of weakly coupled thermal configurations of a certain class of type II superstrings, we set up here the formalism in which we can study the evolution of metric fluctuations across such an S-brane. [...]
arXiv:1312.2524; CERN-PH-TH-2013-289; CPHT-RR001.0113; LPTENS-13-18; CERN-PH-TH-2013-289; CPHT-RR001.0113; LPTENS-13-18.-
2014-03-10 - 48 p.
- Published in : JCAP 03 (2014) 015
Article from SCOAP3: PDF; Fulltext: PDF; IOP Open Access article: PDF; External link: Preprint
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