Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Brümmer, Felix"'
We construct a hybrid-inflation model where the inflaton potential is generated radiatively, as gauge symmetries guarantee it to be accidentally flat at tree level. The model can be regarded as a small-field version of Natural Inflation, with inflati
Externí odkaz:
http://arxiv.org/abs/2406.02531
Publikováno v:
J. High Energ. Phys. 2024, 75 (2024)
In models with spontaneous symmetry breaking by scalar fields in large group representations, we observe that some of the scalar masses can be loop-suppressed with respect to the naive expectation from symmetry selection rules. We present minimal mod
Externí odkaz:
http://arxiv.org/abs/2307.10092
Autor:
Brümmer, Felix
Publikováno v:
JHEP 2001 (2020) 113
In some models of thermal relic dark matter, the relic abundance may be set by inelastic scattering processes (rather than annihilations) becoming inefficient as the universe cools down. This effect has been called coscattering. We present a procedur
Externí odkaz:
http://arxiv.org/abs/1910.01549
We examine the collider signatures of a WIMP dark matter scenario comprising a singlet fermion and an SU(2) n-plet fermion, with a focus on n=3 and n=5. The singlet and n-plet masses are of the order of the electroweak scale. The n-plet contains new
Externí odkaz:
http://arxiv.org/abs/1804.02357
We investigate the stability of the electroweak vacuum for two-Higgs doublet models with a supersymmetric UV completion. The supersymmetry breaking scale is taken to be of the order of the grand unification scale. We first study the case where all su
Externí odkaz:
http://arxiv.org/abs/1512.07761
Publikováno v:
Eur.Phys.J. C74 (2014) 3059
An inverted mass hierarchy in the squark sector, as in so-called "natural supersymmetry", requires non-universal boundary conditions at the mediation scale of supersymmetry breaking. We propose a formalism to define such boundary conditions in a basi
Externí odkaz:
http://arxiv.org/abs/1402.4024
Publikováno v:
JHEP 1404 (2014) 078
We study models of gauge-mediated supersymmetry breaking with a gauged horizontal SU(3)_F symmetry acting on the quark superfields. If SU(3)_F is broken non-supersymmetrically by F-term vacuum expectation values, the massive gauge bosons and gauginos
Externí odkaz:
http://arxiv.org/abs/1312.0935
Autor:
Brümmer, Felix, Buchmüller, Wilfried
Publikováno v:
JHEP 1403 (2014) 075
In supersymmetric extensions of the Standard Model, the Fermi scale of electroweak symmetry breaking is determined by the pattern of supersymmetry breaking. We present an example, motivated by a higher-dimensional GUT model, where a particular mass r
Externí odkaz:
http://arxiv.org/abs/1311.1114
Autor:
Berggren, Mikael, Brümmer, Felix, List, Jenny, Moortgat-Pick, Gudrid, Robens, Tania, Rolbiecki, Krzysztof, Sert, Hale
Publikováno v:
EPJC (2013) 73:2660
In supersymmetric extensions of the Standard Model, higgsino-like charginos and neutralinos are preferred to have masses of the order of the electroweak scale by naturalness arguments. Such light $\widetilde{\chi}^0_1$, $\widetilde{\chi}^0_2$ and $\w
Externí odkaz:
http://arxiv.org/abs/1307.3566
Publikováno v:
Phys.Lett.B726:364-369,2013
In certain models of gauge-mediated supersymmetry breaking with messenger fields in incomplete GUT multiplets, the radiative corrections to the Higgs potential cancel out during renormalization group running. This allows for relatively heavy superpar
Externí odkaz:
http://arxiv.org/abs/1303.1622