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We present a minimal extension of the Standard Model (SM) providing a consistent picture of particle physics from the electroweak scale to the Planck scale and of cosmology from inflation until today. Three right-handed neutrinos $N_i$, a…

High Energy Physics - Phenomenology · Physics 2017-08-09 Guillermo Ballesteros , Javier Redondo , Andreas Ringwald , Carlos Tamarit

A minimal extension of the Standard Model (SM) with a single new mass scale and providing a complete and consistent picture of particle physics and cosmology up to the Planck scale is presented. We add to the SM three right-handed…

High Energy Physics - Phenomenology · Physics 2017-02-22 Guillermo Ballesteros , Javier Redondo , Andreas Ringwald , Carlos Tamarit

We present a minimal model for particle physics and cosmology. The Standard Model (SM) particle content is extended by three right-handed SM-singlet neutrinos N_i and a vector-like quark Q, all of them being charged under a global lepton…

High Energy Physics - Phenomenology · Physics 2016-10-18 Andreas Ringwald

Inspired by the S.M.A.S.H. framework we construct a model that addresses the strong CP problem, axion dark matter, inflation and Dirac neutrino masses as well as leptogenesis. The model possesses only two dynamical scales, namely the SM…

High Energy Physics - Phenomenology · Physics 2022-11-21 Maximilian Berbig

The Standard Model (SM) of particle physics is a big success. However, it lacks explanations for cosmic inflation, the matter-anti-matter asymmetry of the Universe, dark matter, neutrino oscillations, and the feebleness of CP violation in…

High Energy Physics - Phenomenology · Physics 2019-09-04 Guillermo Ballesteros , Javier Redondo , Andreas Ringwald , Carlos Tamarit

The Two-Higgs-Doublet-Standard Model-Axion-Seesaw-Higgs-Portal inflation (2hdSMASH) model consisting of two Higgs doublets, a Standard Model (SM) singlet complex scalar and three SM singlet right-handed neutrinos can embed axion dark…

High Energy Physics - Phenomenology · Physics 2024-07-17 Michael Matlis , Juhi Dutta , Gudrid Moortgat-Pick , Andreas Ringwald

Five fundamental problems - neutrino oscillations, baryogenesis, dark matter, inflation, strong CP problem - are solved at one stroke in "SM-A-S-H" (Standard Model-Axion-Seesaw-Higgs portal inflation) model by Andreas Ringwald et. al. The…

High Energy Physics - Phenomenology · Physics 2018-11-01 C. R. Das , Katri Huitu , Timo J. Karkkainen

In this paper we analyze the spectrum of the primordial gravitational waves (GWs) predicted in the Standard Model*Axion*Seesaw*Higgs portal inflation (SMASH) model, which was proposed as a minimal extension of the Standard Model that…

High Energy Physics - Phenomenology · Physics 2021-02-25 Andreas Ringwald , Ken'ichi Saikawa , Carlos Tamarit

We investigate the Two-Higgs-Doublet-Standard Model-Axion-Seesaw-Higgs-Portal inflation (2hdSMASH) model consisting of two Higgs doublets, a Standard Model (SM) singlet complex scalar and three SM singlet right-handed Majorana neutrinos…

High Energy Physics - Phenomenology · Physics 2023-12-22 Juhi Dutta

Several authors have recently argued that a satisfactory inflationary scenario can be implemented in the Standard Model (SM) by introducing a strong non-minimal coupling of the Higgs doublet to gravity. It is shown here that type I seesaw…

High Energy Physics - Phenomenology · Physics 2009-12-02 Nobuchika Okada , Mansoor Ur Rehman , Qaisar Shafi

Renormalisation group analysis with the present measurements of the top quark mass $m_t = 172.69\pm 0.30$ GeV indicates that the Standard Model (SM) Higgs potential becomes unstable at energy scales $\sim 10^{10}$ GeV. This may be…

High Energy Physics - Phenomenology · Physics 2024-02-26 Shinsuke Kawai , Nobuchika Okada , Qaisar Shafi

We propose a minimal extension of the Standard Model (SM) that addresses both the smallness of neutrino masses and the dark matter (DM) puzzle via the inverse seesaw mechanism and an axion portal fermionic DM. This model generates light…

High Energy Physics - Phenomenology · Physics 2025-06-10 Nakorn Thongyoi , Patipan Uttayarat , Chakrit Pongkitivanichkul

SM*A*S*H is an extension of the Standard Model of particle physics which has just the minimal number of fields in order to solve six puzzles of particle physics and cosmology in one smash: vacuum stability, inflation, baryon asymmetry,…

High Energy Physics - Phenomenology · Physics 2023-12-25 Andreas Ringwald

We investigate a simple model to explain inflation, neutrino masses and dark matter simultaneously. This is based on the so-called radiative seesaw model proposed by Ma in order to explain neutrino masses and dark matter by introducing a…

High Energy Physics - Phenomenology · Physics 2015-06-12 Shinya Kanemura , Toshinori Matsui , Takehiro Nabeshima

We propose a Standard Model extension, coined VISH$\nu$ (Variant-axIon Seesaw Higgs $\nu$-trino), that is an $N_{\text{DW}} = 1$ variation of its predecessor, the $\nu$DFSZ model. In accounting for the origin of neutrino masses, dark matter…

High Energy Physics - Phenomenology · Physics 2022-12-06 Alexei H. Sopov , Raymond R. Volkas

Extending the Standard Model with three right-handed neutrinos and a simple QCD axion sector can account for neutrino oscillations, dark matter and baryon asymmetry; at the same time, it solves the strong CP problem, stabilizes the…

High Energy Physics - Phenomenology · Physics 2021-09-24 Alberto Salvio , Simone Scollo

We show how to enlarge the $\nu$MSM (the minimal extension of the standard model by three right-handed neutrinos) to incorporate inflation and provide a common source for electroweak symmetry breaking and for right-handed neutrino masses.…

High Energy Physics - Phenomenology · Physics 2011-05-05 Mikhail Shaposhnikov , Igor Tkachev

We propose a simple extension of the minimal supersymmetric standard model by introducing a gauge singlet in addition to right-handed neutrinos. The model resolves the strong CP problem by Pecci-Quinn symmetry, explains the origin of…

High Energy Physics - Phenomenology · Physics 2010-08-02 Wan-Il Park

Explaining baryon asymmetry, dark matter and inflation are important elements of a successful theory that extends beyond the Standard Model of particle physics. In this paper we explore these issues within the Next-to-Minimal Supersymmetric…

High Energy Physics - Phenomenology · Physics 2017-04-25 Csaba Balazs , Anupam Mazumdar , Ernestas Pukartas , Graham White

We introduce an axion-inflation model embedded in the Left-Right symmetric extension of the SM in which $W_R$ is coupled to the axion. This model merges three milestones of modern cosmology, i.e., inflation, cold dark matter, and baryon…

High Energy Physics - Phenomenology · Physics 2021-10-13 Azadeh Maleknejad
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