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In the natural realization of the Next-to-minimal Supersymmetric Standard Model, Higgsinos tend to be lighter than about several hundred GeVs, which can induce detectable leptonic signals at the LHC as well as large DM-nucleon scattering…

High Energy Physics - Phenomenology · Physics 2019-04-24 Junjie Cao , Yangle He , Liangliang Shang , Yang Zhang , Pengxuan Zhu

We study dark matter at the MSSM pseudoscalar Higgs resonance (A-funnel), which is one of the few remaining MSSM thermal dark matter candidates in the $100-1000$ GeV range safe from direct detection constraints. To illustrate the various…

High Energy Physics - Phenomenology · Physics 2015-03-05 Archana Anandakrishnan , Bibhushan Shakya , Kuver Sinha

We examine the present and future XENON limits on the neutralino dark matter in split supersymmetry (split-SUSY). Through a scan over the parameter space under the current constraints from collider experiments and the WMAP measurement of…

High Energy Physics - Phenomenology · Physics 2011-11-16 Junjie Cao , Wenyu Wang , Jin Min Yang

We introduce four supersymmetric (SUSY) axion models in which the strong CP problem and the $\mu$ problem are solved with the help of the Peccei-Quinn mechanism and the Kim-Nilles mechanism, respectively. The axion physics enriches the SUSY…

High Energy Physics - Phenomenology · Physics 2024-10-15 Zhong-Jun Yang , Tai-Fu Feng , Xing-Gang Wu

We explore the parameter space of the phenomenological Minimal Supersymmetric Standard Model (pMSSM) with a light neutralino thermal dark matter ($m_{\tilde{\chi}_1^0} \leq m_h/2$) that is consistent with current collider and astrophysical…

High Energy Physics - Phenomenology · Physics 2023-07-20 Rahool Kumar Barman , Geneviève Bélanger , Biplob Bhattacherjee , Rohini M. Godbole , Rhitaja Sengupta

The E989 experiment at the Fermi National Laboratory reported a 4.2$\sigma$ discrepancy between the measured magnetic dipole moment of the muon, and its prediction in the Standard Model (SM). In this study, we address the anomaly by…

High Energy Physics - Phenomenology · Physics 2021-12-17 Jan Tristram Acuña , Patrick Stengel , Piero Ullio

An analysis of supersymmetric dark matter under the Yukawa unification constraint is given. The analysis utilizes the recently discovered region of the parameter space of models with gaugino mass nonuniversalities where large negative…

High Energy Physics - Phenomenology · Physics 2011-05-05 Utpal Chattopadhyay , Achille Corsetti , Pran Nath

We evaluate the amount of fine-tuning in constrained versions of the minimal supersymmetric standard model (MSSM), with different boundary conditions at the GUT scale. Specifically we study the fully constrained version as well as the cases…

High Energy Physics - Phenomenology · Physics 2017-03-09 Graham G. Ross , Kai Schmidt-Hoberg , Florian Staub

Motivated by specific connections to dark matter signatures, we study the prospects of observing the presence of a relatively light gluino whose mass is in the range ~(500-900) GeV with a wino-like lightest supersymmetric particle with mass…

High Energy Physics - Phenomenology · Physics 2010-04-30 Daniel Feldman , Gordon Kane , Ran Lu , Brent D. Nelson

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 focus point region of supersymmetric models is compelling in that it simultaneously features low fine-tuning, provides a decoupling solution to the SUSY flavor and CP problems, suppresses proton decay rates and can accommodate the WMAP…

High Energy Physics - Phenomenology · Physics 2009-11-11 Howard Baer , Tadas Krupovnickas , Stefano Profumo , Piero Ullio

Recent measurements by Planck, LHC experiments, and Xenon100 have significant impact on supersymmetric models and their parameters. We first illustrate the constraints in the mSUGRA plane and then perform a detailed analysis of the general…

Recent experimental results from the LHC have placed strong constraints on the masses of QCD-charged superpartners. The MSSM parameter space is also constrained by the measurement of the Higgs boson mass, and the requirement that the relic…

High Energy Physics - Phenomenology · Physics 2021-04-12 Keita Fukushima , Chris Kelso , Jason Kumar , Pearl Sandick , Takahiro Yamamoto

We fit the $\gamma$-ray excess from the galactic centre (GC) in terms of parameters of the minimal supersymmetric standard model (MSSM). Consistency with other $\gamma$-ray observation, such as those from dwarf spheroidal galaxies, is also…

High Energy Physics - Phenomenology · Physics 2018-02-27 Arpan Kar , Sourav Mitra , Biswarup Mukhopadhyaya , Tirthankar Roy Choudhury

The CMS Collaboration has released the results of its search for supersymmetry, by applying an alphaT method to 1.1/fb of data at 7 TeV. The null result excludes (at 95% CL) a low-mass region of the Constrained MSSM's parameter space that…

High Energy Physics - Phenomenology · Physics 2016-09-19 Andrew Fowlie , Artur Kalinowski , Malgorzata Kazana , Leszek Roszkowski , Yue-Lin Sming Tsai

We study the implications of dark matter searches, together with collider constraints, on the phenomenological MSSM with neutralino dark matter and focus on the consequences of the related uncertainties in some detail. We consider, inter…

High Energy Physics - Phenomenology · Physics 2017-11-30 A. Arbey , M. Boudaud , F. Mahmoudi , G. Robbins

We perform a comprehensive exploration of the Constrained MSSM parameters using a Markov Chain Monte Carlo technique and a Bayesian analysis. We compute superpartner masses and other collider observables as well as a cold dark matter…

High Energy Physics - Phenomenology · Physics 2010-04-06 Roberto Ruiz de Austri , Roberto Trotta , Leszek Roszkowski

The constrained minimal supersymmetric standard model with mu>0 supplemented by an `asymptotic' Yukawa coupling quasi-unification condition, which allows an acceptable b-quark mass, is reinvestigated. Imposing updated constraints from the…

High Energy Physics - Phenomenology · Physics 2015-03-19 N. Karagiannakis , G. Lazarides , C. Pallis

Despite being a simple and well-motivated thermal relic scenario, coannihilation dark matter (DM) has remained largely unexplored experimentally due to the difficulty of probing its nearly degenerate mass spectrum. Recent LHC searches,…

High Energy Physics - Phenomenology · Physics 2026-03-20 Koichi Hamaguchi , Atsuya Niki , Kwok Hei To

In light of current constraints from supersymmetry (SUSY) searches within the LHC, as well as findings from direct dark matter detection experiments such as LUX-ZEPLIN (LZ), we revisit the three-family Pati-Salam model derived from…

High Energy Physics - Phenomenology · Physics 2025-06-17 Imtiaz Khan , Ali Muhammad , Tianjun Li , Shabbar Raza