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The constraints imposed on the Minimal Supersymmetric Standard Model (MSSM) parameter space by the Large Hadron Collider (LHC) Higgs mass limit and gluino mass lower bound are revisited. We also analyze the thermal relic abundance of…

High Energy Physics - Phenomenology · Physics 2016-01-12 W. Abdallah , S. Khalil

We discuss simple extensions of the Standard Model featuring a (fermionic) stable DM candidate interacting with SM fermions through a $Z^{'}$ mediator. These kind of models offer a wide phenomenology but result, at the same time,…

High Energy Physics - Phenomenology · Physics 2015-10-09 Giorgio Arcadi , Yann Mambrini , Mathias Pierre

We study the non-minimal composite Higgs model with global symmetry $\text{SO}(7)$ broken to $\text{SO}(5)\times \text{SO}(2)$. The model results in a composite Two-Higgs doublet model (2HDM) equipped with two extra singlets, the lightest…

High Energy Physics - Phenomenology · Physics 2019-11-20 Alessandro Davoli , Andrea De Simone , David Marzocca , Alessandro Morandini

In the General Next-to-Minimal Supersymmetric Standard Model (GNMSSM), singlet particles may form a secluded sector of dark matter (DM), in which Singlino-like DM could achieve the observed relic abundance through various channels such as…

High Energy Physics - Phenomenology · Physics 2024-08-16 Lei Meng , Junjie Cao , Fei Li , Shenshen Yang

The electroweak (EW) sector of the Minimal Supersymmetric Standard Model (MSSM) can account for variety of experimental data. The EW particles with masses of a few hundred GeV evade the LHC searches owing to their small production cross…

High Energy Physics - Phenomenology · Physics 2022-06-08 Manimala Chakraborti , Sven Heinemeyer , Ipsita Saha , Christian Schappacher

We explore constraints on multipartite dark matter (DM) framework composed of singlet scalar DM interacting with the Standard Model (SM) through Higgs portal coupling. We compute relic density and direct search constraints including the…

High Energy Physics - Phenomenology · Physics 2017-05-03 Subhaditya Bhattacharya , Purusottam Ghosh , Poulose Poulose

Weakly Interacting Massive Particles (WIMPs) are among the main candidates for the relic dark matter (DM). The idea of the direct DM detection relies on elastic spin-dependent (SD) and spin-independent (SI) interaction of WIMPs with target…

High Energy Physics - Phenomenology · Physics 2009-10-20 V. A. Bednyakov , H. V. Klapdor-Kleingrothaus

With growing agony of not finding a dark matter (DM) particle in direct search experiments so far (for example in XENON1T), frameworks where the freeze-out of DM is driven by number changing processes within the dark sector itself and do…

High Energy Physics - Phenomenology · Physics 2020-02-05 Subhaditya Bhattacharya , Purusottam Ghosh , Shivam Verma

We present a minimal secluded dark-matter (DM) framework based on an extra $U(1)_X$ gauge symmetry. The model contains a Dirac DM particle $\chi$, three heavy neutrinos $N_I$ with masses $M_{N,I}$, and a singlet scalar $R$ that mixes with…

High Energy Physics - Phenomenology · Physics 2025-11-26 Mattia Di Mauro

In the Next-to-Minimal-Supersymmetric-Standard-Model (NMSSM) the lightest supersymmetric particle (LSP) is a candidate for the dark matter (DM) in the universe. It is a mixture from the various gauginos and Higgsinos and can be bino-,…

High Energy Physics - Phenomenology · Physics 2017-09-25 C. Beskidt , W. de Boer , D. I. Kazakov , S. Wayand

The study of collision events with missing energy as searches for the dark matter (DM) component of the Universe are an essential part of the extensive program looking for new physics at the LHC. Given the unknown nature of DM, the…

We identify the parameter regions of the phenomenological minimal supersymmetric standard model (pMSSM) with the minimal possible fine-tuning. We show that the fine-tuning of the pMSSM is not large, nor under pressure by LHC searches. Low…

High Energy Physics - Phenomenology · Physics 2017-08-24 Melissa van Beekveld , Wim Beenakker , Sascha Caron , Ruud Peeters , Roberto Ruiz de Austri

We present an overview of supersymmetry searches, both at collider experiments and via searches for dark matter (DM). We focus on three DM possibilities in the SUSY context: the thermally produced neutralino, a mixture of axion and axino,…

High Energy Physics - Phenomenology · Physics 2014-11-18 Howard Baer , Eun-Kyung Park , Xerxes Tata

Supersymmetric Twin Higgs models have a discrete symmetry for which each Standard Model particle and its supersymmetric partner have a corresponding state that transforms under a mirror Standard Model gauge group. This framework is able to…

High Energy Physics - Phenomenology · Physics 2020-04-24 Marcin Badziak , Giovanni Grilli di Cortona , Keisuke Harigaya

We determine the prospects for direct and indirect detection of thermal relic neutralinos in supersymmetric theories with multi-TeV squarks and sleptons. We consider the concrete example of the focus point region of minimal supergravity,…

High Energy Physics - Phenomenology · Physics 2014-10-01 Patrick Draper , Jonathan Feng , Philipp Kant , Stefano Profumo , David Sanford

There are several ways to explain the dark matter relic density other than by the ordinary freeze-out scenario. For example, the freeze-in mechanism may constitute an alternative for generating the correct relic density for dark matter…

High Energy Physics - Phenomenology · Physics 2012-10-02 Andrew J. Williams , Celine Boehm , Stephen M. West , Daniel Albornoz Vasquez

We analyze a low energy effective model of Dark Matter in which the thermal relic density is provided by a singlet Majorana fermion which interacts with the Higgs fields via higher dimensional operators. Direct detection signatures may be…

High Energy Physics - Phenomenology · Physics 2018-04-18 Sebastian Baum , Marcela Carena , Nausheen R. Shah , Carlos E. M. Wagner

We consider a complex scalar field as SIMP dark matter in models with gauged $Z_3$ discrete symmetry appearing as a remnant of dark local $U(1)$. Dark matter (DM) annihilates dominantly by the 3-to-2 scattering, due to the DM cubic coupling…

High Energy Physics - Phenomenology · Physics 2015-08-27 Soo-Min Choi , Hyun Min Lee

We study the prospect of heavy singlet neutrinos as a dark matter (DM) candidate within a neutrinophilic U(1) model, where the Standard Model (SM) is extended with a U(1) gauge symmetry, and neutrino mass and oscillation parameters are…

High Energy Physics - Phenomenology · Physics 2024-05-27 Waleed Abdallah , Anjan Kumar Barik , Santosh Kumar Rai , Tousik Samui