A5066035950- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Black Holes and Theoretical Physics
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Computational Physics and Python Applications
- Distributed and Parallel Computing Systems
- Particle Accelerators and Free-Electron Lasers
- Physics of Superconductivity and Magnetism
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- International Science and Diplomacy
- Quantum, superfluid, helium dynamics
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Cosmic Phenomena
University of Chicago
2021-2025
Deutsches Elektronen-Synchrotron DESY
2020-2024
Sofia University
2024
Fermi National Accelerator Laboratory
2022-2024
Heidelberg University
2024
Heidelberg Institute for Theoretical Studies
2024
Universität Hamburg
2022-2024
Institut de Recherche sur les Lois Fondamentales de l'Univers
2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2024
Leibniz University Hannover
2024
In the Minimal Supersymmetric Standard Model heavy superparticles introduce large logarithms in calculation of lightest $$\mathscr {CP}$$ -even Higgs-boson mass. These logarithmic contributions can be resummed using effective field theory techniques. For light superparticles, however, fixed-order calculations are expected to more accurate. To gain a precise prediction also for intermediate mass scales, two approaches have combined. Here, we report on an improvement this method various steps:...
Various methods are used in the literature for predicting lightest CP-even Higgs boson mass Minimal Supersymmetric Standard Model (MSSM). Fixed-order diagrammatic calculations capture all effects at a given order and yield accurate results scales of supersymmetric (SUSY) particles that not separated too much from weak scale. Effective field theory allow resummation large logarithmic contributions up to orders therefore high SUSY A hybrid approach, where both have been combined, is...
We propose six new benchmark scenarios for Higgs boson searches in the Minimal Supersymmetric Standard Model. Our calculations follow recommendations of LHC Cross Section Working Group, and benefit from recent developments predictions Higgs-boson masses mixing. All proposed are compatible with most results Run 2 LHC. In particular, they feature a scalar mass couplings those observed boson, significant portion their parameter space is allowed by limits SUSY particles additional bosons. define...
Abstract Predictions for the Higgs masses are a distinctive feature of supersymmetric extensions Standard Model, where they play crucial role in constraining parameter space. The discovery boson and remarkably precise measurement its mass at LHC have spurred new efforts aimed improving accuracy theoretical predictions models. “ Precision SUSY Mass Calculation Initiative ” (KUTS) was launched 2014 to provide forum discussions between different groups involved these efforts. This report aims...
Recently, the CDF collaboration has reported a new precision measurement of $W$-boson mass, $M_W$, showing large deviation from value predicted by Standard Model (SM). In this paper, we analyse possible physics contributions to $M_W$ extended Higgs sectors. We focus on Two-Higgs-Doublet (2HDM) as concrete example. Employing predictions for electroweak observables in 2HDM at two-loop level and taking into account further theoretical experimental constraints, identify parameter regions which...
Abstract The remaining theoretical uncertainties from unknown higher-order corrections in the prediction for light Higgs-boson mass of MSSM are estimated. associated with three different approaches that implemented publicly available code compared: fixed-order diagrammatic approach, suitable low SUSY scales, effective field theory (EFT) high and hybrid approach which combines EFT approaches. It is demonstrated a simple single-scale scenario result based on yields precise low, intermediate...
CP violation in the Higgs couplings to fermions is an intriguing, but not yet extensively explored possibility. We use inclusive and differential LHC boson measurements fit structure of Yukawa couplings. Starting with simple effective models featuring a single Higgs-fermion coupling, we probe well-motivated up nine free parameters. also investigate complementarity constraints electron electric dipole moment bound, taking into account possibility modified assess which extent can contribute...
A bstract Two Higgs doublet models (2HDM) provide the low energy effective theory (EFT) description in many well motivated extensions of Standard Model. It is therefore relevant to study their properties, as theoretical constraints on these models. In this article we concentrate three requirements for validity 2HDM framework, namely perturbative unitarity bounds, bounded from below constraints, and vacuum stability constraints. study, most general renormalizable version — without imposing...
While CP violation in the Higgs interactions with massive vector boson is already tightly constrained, nature of fermions far less constrained. In this work, we assess potential machine-learning-based inference methods to constrain top-Yukawa coupling. This approach enables use full available kinematic information. Concentrating on top-associated production decaying two photons, derive expected exclusion bounds for LHC and high-luminosity phase LHC. We also study dependence these interaction...
Precise predictions for Higgs boson masses in the Minimal Supersymmetric Standard Model can be obtained by combining fixed-order calculations with effective field theory (EFT) methods resummation of large logarithms case heavy superpartners. This hybrid approach is implemented computer code FeynHiggs and has been applied previous studies calculating mass lightest CP-even low, intermediate high SUSY scales. In these works it was assumed that non-standard bosons share a common scale...
Ibata et al. recently reported the existence of a vast thin plane dwarf galaxies (VTPD) orbiting around Andromeda. We investigate whether such configuration can be reproduced within standard cosmological framework and search for similar planes corotating satellite Andromeda-like host haloes in data from Millennium II simulation combined with semi-analytic galaxy formation model. apply baryonic mass cut 2.8 × 104 M⊙ restrict to Pan-Andromeda Archaeological Survey-like field. If we include...
We propose two new benchmark scenarios for Higgs-boson searches in the Minimal Supersymmetric Standard Model (MSSM ). These are specifically designed low $$\tan \beta $$ region. A light mass prediction compatible with observed value of $$125\,\hbox {GeV}$$ is ensured almost entire parameter space by employing a flexible supersymmetric (SUSY) scale, reaching values up to $$10^{16}\,\hbox . The MSSM Higgs-sector predictions evaluated an effective field theory (EFT ) framework that exhibits...
The Higgs-gluon interaction is crucial for LHC phenomenology. To improve the constraints on \mathcal{CP} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mstyle mathvariant="script"><mml:mi>𝒞</mml:mi><mml:mi>𝒫</mml:mi></mml:mstyle></mml:math> structure of this coupling, we investigate Higgs production with two jets using machine learning. In particular, exploit sensitivity so far neglected phase space region that differs from typical vector boson fusion-like...
We discuss the parameter spaces of supersymmetry (SUSY) scenarios taking into account improved Higgs-mass prediction provided by FeynHiggs 2.14.1. Among other improvements, this incorporates three-loop renormalization-group effects and two-loop threshold corrections, can accommodate three separate mass scales: $$m_{{{\tilde{q}}}}$$ (for squarks), $$m_{\tilde{g\,}\!}$$ gluinos) $$m_{{{\tilde{\chi }}}}$$ electroweakinos). Furthermore, it contains an treatment $$\overline{\mathrm {DR}}$$ scalar...
The prediction of additional Higgs bosons is one the key features physics beyond Standard Model (SM) that gives rise to an extended sector. We assess sensitivity Large Hadron Collider (LHC) in high luminosity (HL) run alone and combination with a possible future International Linear (ILC) probe heavy neutral bosons. employ Minimal Supersymmetric (MSSM) as framework assume light CP-even MSSM boson be observed at 125 GeV. discuss constraints on parameter space arising from precision...
Abstract The program is a well-established tool for testing Beyond-the-Standard Model (BSM) theories with an extended Higgs sector against experimental limits from collider searches at LEP, Tevatron and LHC. Thus far, it could be applied to any neutral or charged bosons originating the modified sector. Implicitly, these particles were assumed exhibit somewhat hierarchical Yukawa structure as present in Standard Model, where particular couplings first generation fermions neglected. In this...
The trilinear Higgs coupling λ_{hhh} is crucial for determining the structure of potential and probing possible effects physics beyond standard model. Focusing on two-Higgs-doublet model as a concrete example, we identify parameter regions in which significantly enhanced with respect to Taking into account all relevant corrections up two-loop level, show that already current experimental bounds rule out significant parts space would otherwise be unconstrained. We illustrate interpretation...
A new precision measurement of the $W$ boson mass has been announced by CDF collaboration, which strongly deviates from Standard Model prediction. In this article, we study implications on parameter space $SU(2)_L$ triplet extension (with hypercharge $Y=1$) Higgs sector, focusing a limit where is approximate $\mathbb{Z}_2$-odd while SM $\mathbb{Z}_2$-even. We compatibility spectrum preferred measured CDF-II experiment with other electroweak observables and data. comprehensively consider...
We present an overview of the status and recent developments FeynHiggs (current version: 2.14.3) since version 2.12.2. The main purpose is calculation Higgs-boson masses other physical observables in MSSM. For a precise prediction for low high SUSY scales, state-of-the-art fixed-order effective-field-theory calculations are combined. first discuss improvements calculation, namely optional $\overline{\text{DR}}$ renormalization stop sector Higgs ensuring chosen input mass to be equivalent...
A bstract We investigate the determination of Higgs-boson propagator poles in MSSM. Based upon earlier works, we point out that case a large hierarchy between electroweak scale and one or more SUSY masses numerical with DR Higgs field renormalization induces higher order terms which would cancel complete calculation. The origin these is momentum dependence contributions involving at least heavy particles. present two different methods to avoid their appearance. In first approach, are...
State-of-the-art predictions for the mass of lightest MSSM Higgs boson usually involve resummation higher-order logarithmic contributions obtained within an effective-field-theory (EFT) approach, often combined with a fixed-order calculation into hybrid result. For phenomenologically interesting case significant hierarchy between gluino and masses scalar top quarks suffer from large theoretical uncertainties related to non-decoupling power-enhanced in EFT results employing DR‾...
Predictions for the Higgs masses are a distinctive feature of supersymmetric extensions Standard Model, where they play crucial role in constraining parameter space. The discovery boson and remarkably precise measurement its mass at LHC have spurred new efforts aimed improving accuracy theoretical predictions models. "Precision SUSY Mass Calculation Initiative" (KUTS) was launched 2014 to provide forum discussions between different groups involved these efforts. This report aims present...