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We analyze the effective 3 dimensional theory previously constructed for the MSSM and multi-Higgs models to determine the regions of parameter space in which the electroweak phase transition is sufficiently strong for a $B+L$ asymmetry to…

High Energy Physics - Phenomenology · Physics 2009-10-30 Glennys R. Farrar , Marta Losada

To escape the current LHC supersymmetry (SUSY) search constraints while preserve the naturalness condition, we propose the heavy Lightest Supersymmetric Particle (LSP) SUSY. According to the different dependence on the LSP mass, we…

High Energy Physics - Phenomenology · Physics 2015-05-11 Taoli Cheng , Jinmian Li , Tianjun Li

The recent results of the LHC search for electroweak production of supersymmetric (SUSY) particles at $\sqrt{s}=13$ TeV have shown improved lower limits for their masses. In addition, the projected experiment E989 will be able to measure…

High Energy Physics - Phenomenology · Physics 2019-02-28 Hieu Minh Tran , Huong Thu Nguyen

Current data (LHC direct searches, Higgs mass, dark matter-related bounds) severely affect the constrained minimal SUSY standard model (CMSSM) with neutralinos as dark matter candidates. But the evidence for neutrino masses coming from…

High Energy Physics - Phenomenology · Physics 2016-07-22 Shankha Banerjee , Geneviève Bélanger , Biswarup Mukhopadhyaya , Pasquale D. Serpico

We analyse the predictions of both Higgs and top masses in a generic MSSM satisfying gauge-coupling unification, radiative electroweak symmetry breaking, with a natural (non-splitted) spectrum of soft-breaking terms, and an arbitrary…

High Energy Physics - Phenomenology · Physics 2018-06-06 Gino Isidori , Andrea Pattori

We observe that in SUSY models with non-universal GUT scale gaugino mass parameters, raising the GUT scale SU(2) gaugino mass |M_2| from its unified value results in a smaller value of -m_{H_u}^2 at the weak scale. By the electroweak…

High Energy Physics - Phenomenology · Physics 2008-11-26 Howard Baer , Azar Mustafayev , Heaya Summy , Xerxes Tata

We present the state-of-the-art of the effective field theory computation of the MSSM Higgs mass, improving the existing ones by including extra threshold corrections. We show that, with this approach, the theoretical uncertainty is within…

High Energy Physics - Phenomenology · Physics 2015-04-22 Javier Pardo Vega , Giovanni Villadoro

It is well known that excessively heavy supersymmetric particles (sparticles) are disfavored to explain the $(g-2)_\mu$ anomaly, but some people overlook that moderately light sparticles are also disfavored by the LHC probes of…

High Energy Physics - Phenomenology · Physics 2022-10-18 Junjie Cao , Fei Li , Jingwei Lian , Yusi Pan , Di Zhang

The discovery of a 125 GeV Higgs boson and rising lower bounds on the masses of superpartners have lead to concerns that supersymmetric models are now fine tuned. Large stop masses, required for a 125 GeV Higgs, feed into the electroweak…

High Energy Physics - Phenomenology · Physics 2015-07-23 P. Athron , D. Harries , A. G. Williams

We use the Higgs coupling and the muon anomalous magnetic moment measurements to constrain the parameter space of the natural supersymmetry (SUSY) in the Generalized Minimal Supergravity (GmSUGRA) model. We scan the parameter space of the…

High Energy Physics - Phenomenology · Physics 2016-04-06 Tianjun Li , Shabbar Raza , Kechen Wang

The natural supersymmetry (SUSY) requires that stop, sbottom, and gluino be around one TeV or lighter. By using the direct SUSY search bounds from both ATLAS and CMS Collaborations, we examine the constraints on the natural SUSY in the Next…

High Energy Physics - Phenomenology · Physics 2014-01-29 Taoli Cheng , Jinmian Li , Tianjun Li , Qi-Shu Yan

We present global fits of the constrained Minimal Supersymmetric Standard Model (cMSSM) and the Non-Universal Higgs Model (NUHM), including the most recent CMS constraint on the Higgs boson mass, 5.8/fb integrated luminosity null…

High Energy Physics - Phenomenology · Physics 2014-04-28 C. Strege , G. Bertone , F. Feroz , M. Fornasa , R. Ruiz de Austri , R. Trotta

{\tenrm The possibility of detecting supersymmetric dark matter is examined within the framework of the minimal supergravity model (MSGM), where the $\tilde{Z}_{1}$ is the LSP for almost the entire parameter space. A brief discussion is…

High Energy Physics - Phenomenology · Physics 2009-09-25 R. Arnowitt , Pran Nath

We explore the possibility that both the weak scale and the thermal relic dark matter abundance are environmentally selected in a multiverse. An underlying supersymmetric theory containing the states of the MSSM and singlets, with…

High Energy Physics - Phenomenology · Physics 2010-05-25 Gilly Elor , Hock-Seng Goh , Lawrence J. Hall , Piyush Kumar , Yasunori Nomura

We present the implementation of the radiative corrections of the Higgs sector in three public computer codes for the evaluation of the particle spectrum in the Minimal Supersymmetric Standard Model, Softsusy, Spheno and SuSpect. We…

High Energy Physics - Phenomenology · Physics 2018-05-24 B. C. Allanach , A. Djouadi , J. L. Kneur , W. Porod , P. Slavich

The identity of Dark Matter (DM) is one of the most captivating topics in particle physics today. The R-parity conserving Minimal Supersymmetric Standard Model (MSSM), which naturally provides a DM candidate in the form of the lightest…

High Energy Physics - Phenomenology · Physics 2018-01-15 Carlos Ávila , Andrés Flórez , Alfredo Gurrola , Dale Julson , Savanna Starko

The Exceptional Supersymmetric Standard Model (E$_6$SSM) is a low energy alternative to the MSSM with an extra $U(1)$ gauge symmetry and three generations of matter filling complete 27-plet representations of $E_6$. This provides both new D…

High Energy Physics - Phenomenology · Physics 2017-03-01 P. Athron , A. W. Thomas , S. J. Underwood , M. J. White

We propose the Supersymmetric Standard Models (SSMs) with a pseudo-Dirac gluino from hybrid $F-$ and $D-$term supersymmetry (SUSY) breakings. Similar to the SSMs before the LHC, all the supersymmetric particles in the Minimal SSM (MSSM)…

High Energy Physics - Phenomenology · Physics 2015-07-16 Ran Ding , Tianjun Li , Florian Staub , Chi Tian , Bin Zhu

The search for dark matter (DM) at colliders is founded on the idea of looking for something invisible. There are searches based on production and decay processes where DM may reveal itself as missing energy. If nothing is found, our best…

High Energy Physics - Phenomenology · Physics 2022-12-07 Felix Egle , Margarete Mühlleitner , Rui Santos , João Viana

At present, the Standard Model (SM) agrees with almost all collider data. Yet, three finetuning issues -- the Higgs mass problem, the strong CP problem and the cosmological constant problem -- all call for new physics. The most plausible…

High Energy Physics - Phenomenology · Physics 2024-05-03 Howard Baer