2022-03-19 08:55 |
Non-minimally assisted chaotic inflation
/ Hyun, Sang Chul (Yonsei U. ; IPAP, Seoul) ; Kim, Jinsu (CERN) ; Park, Seong Chan (Yonsei U. ; Korea Inst. Advanced Study, Seoul) ; Takahashi, Tomo (Saga U., Japan)
Conventional wisdom says that a chaotic inflation model with a power-law potential is ruled out by the recent Planck-BICEP/Keck results. We find, however, that the model can be assisted by a non-minimally coupled scalar field and still provides a successful inflation. [...]
arXiv:2203.09201; YHEP-COS22-01; KIAS-P22015; CERN-TH-2022-040.-
2022-05-31 - 14 p.
- Published in : JCAP 2205 (2022) 045
Fulltext: document - PDF; 2203.09201 - PDF;
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2022-03-16 04:13 |
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2022-03-08 04:09 |
Scaling and adiabaticity in a rapidly expanding gluon plasma
/ Brewer, Jasmine (CERN) ; Scheihing-Hitschfeld, Bruno (MIT, Cambridge, CTP) ; Yin, Yi (Lanzhou, Inst. Modern Phys.)
In this work we aim to gain qualitative insight on the far-from-equilibrium behavior of the gluon plasma produced in the early stages of a heavy-ion collision. It was recently discovered arXiv:1810.10554 that the distribution functions of quarks and gluons in QCD effective kinetic theory (EKT) exhibit self-similar "scaling" evolution with time-dependent scaling exponents long before those exponents reach their pre-hydrodynamic fixed-point values. [...]
arXiv:2203.02427; CERN-TH-2022-026; MIT-CTP/5411.-
2022-05-23 - 38 p.
- Published in : JHEP 2205 (2022) 145
Fulltext: 2203.02427 - PDF; document - PDF;
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2022-03-08 04:02 |
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;
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2022-03-08 04:02 |
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2022-03-02 04:22 |
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2022-02-22 04:12 |
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2022-02-14 09:08 |
RG-induced modulus stabilization: perturbative de Sitter vacua and improved D3-$ \overline{\mathrm{D}3} $ inflation
/ Burgess, C.P. (McMaster U. ; Perimeter Inst. Theor. Phys. ; CERN) ; Quevedo, F. (Cambridge U., DAMTP)
We propose a new mechanism that adapts to string theory a perturbative method for stabilizing moduli without leaving the domain of perturbative control, thereby evading the `Dine-Seiberg' problem. The only required nonperturbative information comes from the standard renormalization-group resummation of leading logarithms that allow us simultaneously to work to a fixed order in the perturbative parameter $\alpha$ and to all orders in $\alpha \ln\tau$ where $\tau$ is a large extra-dimensional modulus. [...]
arXiv:2202.05344; CERN-TH-2022-009.-
2022-06-30 - 46 p.
- Published in : JHEP 2206 (2022) 167
Fulltext: 2202.05344 - PDF; document - PDF;
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2022-02-04 04:13 |
Gegenbauer's Twin
/ Durieux, Gauthier (CERN) ; McCullough, Matthew (CERN) ; Salvioni, Ennio (U. Padua, Dept. Phys. Astron. ; INFN, Padua)
In Twin Higgs models the dominant source of fine-tuning is the cancellation of order $v^2/f^2$ required to obtain a Standard Model-like Higgs, where $v$ and $f$ are the electroweak and new physics scales, respectively. Recently proposed Gegenbauer Goldstone models naturally realise $v^2/f^2 \ll 1$ and hence remove this source of fine-tuning. [...]
arXiv:2202.01228; CERN-TH-2022-012.-
2022-05-20 - 7 p.
Fulltext: document - PDF; 2202.01228 - PDF;
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2022-01-21 04:06 |
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