|
1.
|
Gravitational portals with nonminimal couplings
/ Clery, Simon (IJCLab, Orsay) ; Mambrini, Yann (IJCLab, Orsay ; CERN) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Shkerin, Andrey (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
We consider the effects of non-minimal couplings to curvature of the form $\xi_S S^2 R$, for three types of scalars: the Higgs boson, the inflaton, and a scalar dark matter candidate. We compute the abundance of dark matter produced by these non-minimal couplings to gravity and compare to similar results with minimal couplings. [...]
arXiv:2203.02004; UMN--TH--4116/22; FTPI--MINN--22/07; CERN-TH-2022-025.-
2022-05-01 - 14 p.
- Published in : Phys. Rev. D 105 (2022) 095042
Fulltext: PhysRevD.105.095042 - PDF; 2203.02004 - PDF;
|
|
|
2.
|
Gravitational portals in the early Universe
/ Clery, Simon (IJCLab, Orsay) ; Mambrini, Yann (IJCLab, Orsay ; CERN) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
We consider the production of matter and radiation during reheating after inflation, restricting our attention solely to gravitational interactions. Processes considered are the exchange of a graviton, $h_{\mu \nu}$, involved in the scattering of the inflaton or particles in the newly created radiation bath. [...]
arXiv:2112.15214; UMN-TH-4110/22; FTPI-MINN-22/02; CERN-TH-2021-222.-
2022-04-01 - 15 p.
- Published in : Phys. Rev. D 105 (2022) 075005
Fulltext: PDF;
|
|
|
3.
|
BICEP/Keck Constraints on Attractor Models of Inflation and Reheating
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Garcia, Marcos A.G. (Mexico U.) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
Recent BICEP/Keck data on the cosmic microwave background, in combination with previous WMAP and Planck data, impose strong new constraints on the tilt in the scalar perturbation spectrum, $n_s$, as well as the tensor-to-scalar ratio, $r$. These constrain the number of e-folds of inflation, $N_*$, the magnitude of the inflaton coupling to matter, $y$, and the reheating temperature, $T_{\rm reh}$, which we evaluate in attractor models of inflation as formulated in no-scale supergravity. [...]
arXiv:2112.04466; KCL-PH-TH/2021-90; CERN-TH-2021-199; ACT-06-21; MI-HET-769,
UMN-TH-4107/21; FTPI-MINN-21/26.-
2022-02-03 - 9 p.
- Published in : Phys. Rev. D 105 (2022) 043504
Fulltext: 2112.04466 - PDF; PhysRevD.105.043504 - PDF;
|
|
|
4.
|
Freeze-in from Preheating
/ Garcia, Marcos A.G. (Madrid, IFT ; Madrid, Autonoma U. ; INFN, Padua ; U. Padua (main)) ; Kaneta, Kunio (Tokyo Woman's Christian U.) ; Mambrini, Yann (IJCLab, Orsay ; CERN) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
We consider the production of dark matter during the process of reheating after inflation. The relic density of dark matter from freeze-in depends on both the energy density and energy distribution of the inflaton scattering or decay products composing the radiation bath. [...]
arXiv:2109.13280; UMN-TH-4101/21; FTPI-MINN-21/19; CERN-TH-2021-121.-
2022-03-08 - 39 p.
- Published in : JCAP 2203 (2022) 016
Fulltext: PDF;
|
|
|
5.
|
Non-Oscillatory No-Scale Inflation
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U.) ; Verner, Sarunas (Minnesota U.)
We propose a non-oscillatory no-scale supergravity model of inflation (NO-NO inflation) in which the inflaton does not oscillate at the end of the inflationary era. Instead, the Universe is then dominated by the inflaton kinetic energy density (kination). [...]
arXiv:2008.09099; UMN-TH-3924/20; FTPI-MINN-20/27; KCL-PH-TH/2020-38,
CERN-TH-2020-123; ACT-05-20; MI-TH-2020.-
2021-03-16 - 31 p.
- Published in : JCAP 2103 (2021) 052
Fulltext: PDF;
|
|
|
6.
|
Building Models of Inflation in No-Scale Supergravity
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Garcia, Marcos A.G. (Madrid, IFT) ; Nagata, Natsumi (Tokyo U.) ; Nanopoulos Dimitri V. (TAMU, College Station ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U.) ; Verner, Sarunas (Minnesota U.)
After reviewing the motivations for cosmological inflation formulated in the formalism of supersymmetry, we argue that the appropriate framework is that of no-scale supergravity. We then show how to construct within this framework inflationary models whose predictions for the tilt in the spectrum of scalar perturbations, $n_s$, and the ratio, $r$, of tensor and scalar perturbations coincide with those of the $R + R^2$ model of inflation proposed by Starobinsky. [...]
arXiv:2009.01709; KCL-PH-TH/2020-44; CERN-TH-2020-136; ACT-6-20; MI-TH-2024, UMN-TH-3926/20; MI-TH-2024,
UMN-TH-3926/20; FTPI-MINN-20/29; IFT-UAM/CSIC-20-126.-
2020-10-22 - 85 p.
- Published in : Int. J. Mod. Phys. D 29 (2020) 2030011
Fulltext: PDF;
|
|
|
7.
|
Phenomenology and Cosmology of No-Scale Attractor Models of Inflation
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
We have recently proposed attractor models for modulus fixing, inflation, supersymmetry breaking and dark energy based on no-scale supergravity. In this paper we develop phenomenological and cosmological aspects of these no-scale attractor models that underpin their physical applications. [...]
arXiv:2004.00643; KCL-PH-TH/2020-14; CERN-TH-2020-046; ACT-02-20; MI-TH-2010,
UMN-TH-3915/20; MI-TH-2010, UMN-TH-3915/20; FTPI-MINN-20/05.-
2020-08-19 - 41 p.
- Published in : JCAP 2008 (2020) 037
Fulltext: PDF;
|
|
|
8.
|
From Minkowski to de Sitter in Multifield No-Scale Models
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Nagaraj, Balakrishnan (Texas A-M) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
We show the uniqueness of superpotentials leading to Minkowski vacua of single-field no-scale supergravity models, and the construction of dS/AdS solutions using pairs of these single-field Minkowski superpotentials. We then extend the construction to two- and multifield no-scale supergravity models, providing also a geometrical interpretation. [...]
arXiv:1907.09123; KCL-PH-TH/2019-62; CERN-TH-2019-119; ACT-04-19; MI-TH-1928, UMN-TH-3829/19; MI-TH-1928,
UMN-TH-3829/19; FTPI-MINN-19/20.-
2019-10-14 - 31 p.
- Published in : JHEP 1910 (2019) 161
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
|
|
|
9.
|
Unified No-Scale Attractors
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Nanopoulos, Dimitri V. (TAMU, College Station ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U.) ; Verner, Sarunas (Minnesota U.)
We have presented previously a general treatment of Starobinsky-like inflation in no-scale supergravity where the tensor-to-scalar ratio $r = 3(1 - n_s)^2$, and $n_s$ is the tilt of the scalar perturbations. In particular, we have shown how this scenario can be unified with modulus fixing, supersymmetry breaking and a small cosmological constant. [...]
arXiv:1906.10176; KCL-PH-TH/2019-51; CERN-TH-2019-089; ACT-03-19; MI-TH-1923; UMN-TH-3826/19; MI-TH-1923,
UMN-TH-3826/19; FTPI-MINN-19/17.-
2019-09-20 - 32 p.
- Published in : JCAP 1909 (2019) 040
Fulltext: PDF;
|
|
|
10.
|
A Unified No-Scale Model of Modulus Fixing, Inflation, Supersymmetry Breaking and Dark Energy
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Nanopoulos, Dimitri V. (Texas A-M ; HARC, Woodlands ; Athens Academy) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.) ; Verner, Sarunas (Minnesota U., Theor. Phys. Inst.)
We present a minimal SU(2,1)/SU(2) x U(1) no-scale model that incorporates in an economical way modulus fixing, Starobinsky-like inflation, an adjustable scale for supersymmetry breaking and the possibility of a small cosmological constant, a.k.a. dark energy..
arXiv:1903.05267; KCL-PH-TH/2019-24; CERN-TH-2019-024; ACT-01-19; MI-TH-1917; MI-TH-1917,
UMN-TH-3820/19; FTPI-MINN-19/11; UMN-TH-3820/19.-
2019-07-19 - 6 p.
- Published in : Phys. Rev. D 100 (2019) 025009
Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF;
|
|
email alert
or subscribe to the 
RSS feed.