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1.
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Inflationary Gravitational Leptogenesis
/ Co, Raymond T. (Minnesota U., Theor. Phys. Inst.) ; Mambrini, Yann (IJCLab, Orsay ; CERN) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
We consider the generation of the baryon asymmetry in models with right-handed neutrinos produced through gravitational scattering of the inflaton during reheating. The right-handed neutrinos later decay and generate a lepton asymmetry, which is partially converted to a baryon asymmetry by Standard Model sphaleron processes. [...]
arXiv:2205.01689; CERN-TH-2022-071; UMN-TH-4121/22; FTPI-MINN-22/12.-
2022-10-01 - 6 p.
- Published in : Phys. Rev. D 106 (2022) 075006
Fulltext: 2205.01689 - PDF; Publication - PDF;
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2.
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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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3.
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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;
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4.
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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;
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5.
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Extra U(1), effective operators, anomalies and dark matter
/ Dudas, Emilian (Ecole Polytechnique, CPHT) ; Heurtier, Lucien (Ecole Polytechnique, CPHT) ; Mambrini, Yann (Orsay, LPT) ; Zaldivar, Bryan (Madrid, IFT)
A general analysis is performed on the dimension-six operators mixing an almost hidden Z' to the Standard Model (SM), when the Z' communicates with the SM via heavy mediators. These are fermions charged under both Z' and the SM, while all SM fermions are neutral under Z'. [...]
arXiv:1307.0005; LPT-Orsay-13-49; CPHT-RR-054-0613; IFT-UAM-CSIC-13-76.-
2013 - 35 p.
- Published in : JHEP 11 (2013) 083
Springer Open Access article: PDF; External link: Preprint
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6.
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Strong moduli stabilization and phenomenology
/ Dudas, Emilian (Orsay, LPT ; Ecole Polytechnique, CPHT ; CERN) ; Linde, Andrei (Stanford U., Phys. Dept. ; Stanford U., ITP) ; Mambrini, Yann (Orsay, LPT) ; Mustafayev, Azar (Hawaii U. ; Minnesota U., Theor. Phys. Inst.) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
We describe the resulting phenomenology of string theory/supergravity models with strong moduli stabilization. The KL model with F-term uplifting, is one such example. [...]
arXiv:1209.0499; CERN-PH-TH-2012-228; CPHT-RR069.0812; UMN-TH-3116-12; LPT-ORSAY-12-92; UH-511-1199-12; FTPI-MINN-12-28; CERN-PH-TH-2012-228; CPHT-RR069.0812; UMN-TH-3116-12; FTPI-MINN-12-28; LPT-ORSAY-12-92; UH-511-1199-12.-
2013-01-15 - 21 p.
- Published in : Eur. Phys. J. C 73 (2013) 2268
Fulltext: PDF; External link: Preprint
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7.
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Relating the CMSSM and SUGRA models with GUT scale and Super-GUT scale Supersymmetry Breaking
/ Dudas, Emilian (Orsay, LPT ; Ecole Polytechnique, CPHT ; CERN) ; Mambrini, Yann (Orsay, LPT) ; Mustafayev, Azar (Minnesota U., Theor. Phys. Inst.) ; Olive, Keith A. (Minnesota U., Theor. Phys. Inst.)
While the constrained minimal supersymmetric standard model (CMSSM) with universal gaugino masses, $m_{1/2}$, scalar masses, $m_0$, and A-terms, $A_0$, defined at some high energy scale (usually taken to be the GUT scale) is motivated by general features of supergravity models, it does not carry all of the constraints imposed by minimal supergravity (mSUGRA). In particular, the CMSSM does not impose a relation between the trilinear and bilinear soft supersymmetry breaking terms, $B_0 = A_0 - m_0$, nor does it impose the relation between the soft scalar masses and the gravitino mass, $m_0 = m_{3/2}$. [...]
UMN-TH-3103-12; FTPI-MINN-12-17; LPT-ORSAY-12-49; arXiv:1205.5988; UMN--TH--3103-12; FTPI--MINN--12-17; LPT--ORSAY-12-49.-
2012 - 16 p.
- Published in : Eur. Phys. J. C 72 (2012) 2138
Fulltext: PDF; External link: Preprint
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8.
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9.
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Extra U(1) as natural source of a monochromatic gamma ray line
/ Dudas, Emilian (CERN ; Ecole Polytechnique, CPHT) ; Mambrini, Yann (Orsay, LPT) ; Pokorski, Stefan (Warsaw U. ; TUM-IAS, Munich) ; Romagnoni, Alberto (Madrid, IFT ; Madrid, Autonoma U.)
Extensions of the Standard Model with an extra U'(1) abelian group generically generate terms coming from loops of heavy fermions, leading to three gauge boson couplings, in particular Z'Z gamma. We show that WMAP data constrains the gauge coupling of the group g_D to values comparable with the electro-weak ones, rather independently of the mass of Z'. [...]
arXiv:1205.1520; CERN-PH-TH-2012-109; CPHT-RR-018.0512; FTUAM-12-90; IFT-UAM-CSIC-12-37; LPT-ORSAY-12-39; CERN-PH-TH-2012-109.-
2012 - 6 p.
- Published in : JHEP 10 (2012) 123
Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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