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We describe a natural UV complete theory with a composite little Higgs. Below a TeV we have the minimal Standard Model with a light Higgs, and an extra neutral scalar. At the TeV scale there are additional scalars, gauge bosons, and…

High Energy Physics - Phenomenology · Physics 2009-11-10 Emanuel Katz , Jaeyong Lee , Ann E. Nelson , Devin G. E. Walker

The six Higgs doublet model is a minimal extension of the Standard Model that addresses dark matter and gauge coupling unification. Another Higgs doublet in a 5 representation of a discrete symmetry group, such as S_6, is added to the SM.…

High Energy Physics - Phenomenology · Physics 2011-11-09 Mariangela Lisanti , Jay G. Wacker

The prediction for the Higgs mass in the dark matter selected high-scale SUSY is explored. We show the bounds on SUSY-breaking scale in models of SM $+\tilde{w}$ and SM $+\tilde{h}/\tilde{s}$ due to the observed Higgs mass at the LHC. We…

High Energy Physics - Phenomenology · Physics 2015-03-13 Sibo Zheng

If dark matter is a new species of particle produced in the early universe as a cold thermal relic (a weakly-interacting massive particle-WIMP), its present abundance, its scattering with matter in direct-detection experiments, its…

High Energy Physics - Phenomenology · Physics 2013-05-02 Jing-Yuan Chen , Edward W. Kolb , Lian-Tao Wang

The recent WMAP data provide a rather restricted range of the Cold Dark Matter (CDM) density $ \Omega_{CDM} h^2 $ of unprecedented accuracy. We combine these new data along with data from BNL E821 experiment measuring $ {(g_{\mu}-2)}$, $…

High Energy Physics - Phenomenology · Physics 2008-11-26 A. B. Lahanas , D. V. Nanopoulos

Increasingly sensitive direct detection dark matter experiments are testing important regions of parameter space for WIMP dark matter and pushing many models to the multi-TeV regime. This brings into question the perturbativity of these…

High Energy Physics - Phenomenology · Physics 2025-07-11 Miguel Escudero , Thomas Hambye

We study phenomenological implications of the ATLAS and CMS hint of a $125\pm 1$ GeV Higgs boson for the singlet, and singlet plus doublet non-supersymmetric dark matter models, and for the phenomenology of the CMSSM. We show that in scalar…

High Energy Physics - Phenomenology · Physics 2013-01-18 M. Kadastik , K. Kannike , A. Racioppi , M. Raidal

In the Minimal Supersymmetric Model (MSSM) and the Next to Minimal Supersymmetric Model [(M+1)SSM], an upper bound on the lightest higgs mass can be calculated. On the other hand, vacuum stability implies a lower limit on the mass of the…

High Energy Physics - Phenomenology · Physics 2009-10-28 Marco A. Diaz , Tonnis A. ter Veldhuis , Thomas J. Weiler

We examine the parameter space of the constrained MSSM by considering various experimental constraints. For the dark matter sector, we require the neutralino dark matter to account for the relic density measured by the WMAP and satisfy the…

High Energy Physics - Phenomenology · Physics 2012-04-12 Junjie Cao , Zhaoxia Heng , Dongwei Li , Jin Min Yang

Scalar singlet dark matter is one of the simplest and most predictive realisations of the WIMP (weakly-interacting massive particle) idea. Although the model is constrained from all directions by the latest experimental data, it still has…

High Energy Physics - Phenomenology · Physics 2020-08-06 Peter Athron , Jonathan M. Cornell , Felix Kahlhoefer , James McKay , Pat Scott , Sebastian Wild

We propose and study a scalar extension of the Standard Model which respects a $\mathbb{Z}_3$ symmetry remnant of the spontaneous breaking of a global $U(1)_\text{DM}$ symmetry. Consequently, this model has a natural dark matter candidate…

High Energy Physics - Phenomenology · Physics 2015-06-23 Nicolas Bernal , Camilo Garcia-Cely , Rogerio Rosenfeld

The Higgs doublet can mediate a long-range interaction between multi-TeV particles coupled to the Weak interactions of the Standard Model, while its emission can lead to very rapid bound-state formation processes and bound-to-bound…

High Energy Physics - Phenomenology · Physics 2021-09-03 Ruben Oncala , Kalliopi Petraki

We consider a minimal natural supersymmetric model based on an extra dimension with supersymmetry breaking provided by the Scherk-Schwarz mechanism. The lightest supersymmetric particle is a neutral, quasi-Dirac Higgsino and, unlike in…

High Energy Physics - Phenomenology · Physics 2019-04-24 Antonio Delgado , Adam Martin , Mariano Quiros

The vanishing of the Higgs quartic coupling at a high energy scale may be explained by Intermediate Scale Supersymmetry, where supersymmetry breaks at $(10^9$-$10^{12})$ GeV. The possible range of supersymmetry breaking scales can be…

High Energy Physics - Phenomenology · Physics 2021-04-21 David Dunsky , Lawrence J. Hall , Keisuke Harigaya

We discuss a model which would explain neutrino oscillation, dark matter, and baryon asymmetry of the Universe simultaneously by the physics at TeV scales. Tiny neutrino masses are generated at the three loop level due to the exact $Z_2$…

High Energy Physics - Phenomenology · Physics 2009-01-08 Mayumi Aoki , Shinya Kanemura , Osamu Seto

We suggest that dark matter can be identified with a stable composite fermion X^0, that arises within the holographic AdS/CFT models, where the Higgs boson emerges as a composite pseudo-goldstone boson. The predicted properties of X^0…

High Energy Physics - Phenomenology · Physics 2009-04-24 J. Lorenzo Diaz-Cruz

The CDMS Collaboration has reported two candidate events for dark matter. If the events are due to the elastic scattering of dark matter, the dark matter would be a WIMP dark matter with its mass of the order of 10-100GeV and its scattering…

High Energy Physics - Phenomenology · Physics 2010-07-29 Masaki Asano , Shigeki Matsumoto , Masato Senami , Hiroaki Sugiyama

Assuming that supersymmetry exists well above the weak scale, we derive the full one-loop matching conditions between the SM and the supersymmetric theory, allowing for the possibility of an intermediate Split-SUSY scale. We also compute…

High Energy Physics - Phenomenology · Physics 2014-09-18 Emanuele Bagnaschi , Gian F. Giudice , Pietro Slavich , Alessandro Strumia

We study light, thermal neutralino dark matter in the sub-GeV to 65 GeV mass range in the Minimal Supersymmetric extension of the Standard Model (MSSM). We consider realizations of the limit of alignment without decoupling in the Higgs…

High Energy Physics - Phenomenology · Physics 2016-12-20 Stefano Profumo , Tim Stefaniak

In the present universe visible and dark matter contribute comparable energy density although they have different properties. This coincidence can be elegantly explained if the dark matter relic density, originating from a dark matter…

High Energy Physics - Phenomenology · Physics 2011-09-05 Pei-Hong Gu , Manfred Lindner , Utpal Sarkar , Xinmin Zhang
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