A5058003522- Particle physics theoretical and experimental studies
- Black Holes and Theoretical Physics
- Quantum Chromodynamics and Particle Interactions
- Cosmology and Gravitation Theories
- Noncommutative and Quantum Gravity Theories
- Computational Physics and Python Applications
- High-Energy Particle Collisions Research
- Distributed and Parallel Computing Systems
- Superconducting Materials and Applications
- Spectral Theory in Mathematical Physics
- Physics of Superconductivity and Magnetism
- Advanced Operator Algebra Research
University of Zagreb
2018-2024
TU Dresden
2020-2022
Université Paris-Saclay
2017
Université Paris-Sud
2015-2017
Centre National de la Recherche Scientifique
2017
Laboratoire de Physique Théorique
2015-2017
We study the application of Breitenlohner-Maison-'t Hooft-Veltman (BMHV) scheme Dimensional Regularization to renormalization chiral gauge theories, focusing on specific counterterm structure required by non-anticommuting Dirac $\gamma_5$ matrix and breaking BRST invariance. Calculations are performed at one-loop level in a massless Yang-Mills theory with fermions real scalar fields. discuss setup properties regularized detail. Our central results full structures needed for correct...
This review provides a detailed introduction to chiral gauge theories, renormalization theory, and the application of dimensional regularization with non-anticommuting BMHV scheme for γ5. One goal was show how theories can be renormalized despite spurious breaking invariance obtain required symmetry-restoring counterterms. A second familiarize reader theoretical basis theorems that guarantee existence at all orders as consistent quantum theories. Relevant topics include BPHZ renormalization,...
We discuss the validity of Standard Model Effective Field Theory (SM EFT) as low-energy effective theory for two-Higgs-doublet (2HDM). Using up-to-date Higgs signal strength measurements at LHC, one can obtain a likelihood function Wilson coefficients dimension-6 operators in EFT Lagrangian. Given matching between 2HDM and EFT, constraints on be translated into parameters under which conditions such procedure correctly reproduces true limits 2HDM. Finally, we employ SM to identify pattern...
Probing the properties of discovered Higgs boson may tell us whether or not it is same particle as one predicted by Standard Model. To this aim we parametrize deviations couplings to matter from Model using Effective Field Theory framework. Starting with a general dimension-6 effective Lagrangian including both CP-even and CP-odd operators, requiring that operators do introduce power divergences in oblique parameters, reduce number independent theory. This framework then used put updated...
A bstract We apply the BMHV scheme for non-anticommuting γ 5 to an abelian chiral gauge theory at two-loop level. As our main result, we determine full structure of symmetry-restoring counterterms up These turn out have same as one-loop level and a simple interpretation in terms restoration well-known Ward identities. In addition, show that ultraviolet divergences cannot be canceled completely by generated field parameter renormalization, needed UV divergent evanescent counterterms. The...
We discuss exotic Higgs decays in an effective field theory where the Standard Model is extended by dimension-6 operators. review and update status of two-body lepton- quark-flavor-violating involving boson. also comment on possibility observing three-body flavor-violating this context.
We discuss how renormalisation group equations can be consistently formulated using the algebraic framework, in context of a dimensionally-renormalised chiral field theory BMHV scheme, where BRST symmetry, originally broken at quantum level, is restored via finite counterterms. compare it with more standard multiplicative approach, which application would cumbersome this setting. Both procedures are applied and compared on example massless right-handed QED model, beta-function anomalous...
We study the CP violating ZZZ vertex in two-Higgs doublet model, which is a probe of Jarlskog-type invariant extended Higgs sector. The form factor $f_4^Z$ evaluated at one loop general $R_\xi$ gauge and its magnitude estimated realistic parameter space. Then we turn to decoupling limit where extra scalars are heavy physics can be described by Standard Model supplemented higher-dimensional operators. leading operator contributing identified. not generated effective theory dimension-8...
The study of the properties scalar boson recently discovered at LHC (ATLAS and CMS experiments) may allow us to know whether it is well described by Standard Model. In case where deviations from SM predictions are present, this would be an evidence for presence new physics. We focus on Higgs couplings matter in a model-independent approach introducing dimension-6 effective Lagrangian that includes both CP-even CP-odd couplings. Constraints set some these coefficients using experimental data...
This review provides a detailed introduction to chiral gauge theories, renormalization theory, and the application of dimensional regularization with non-anticommuting BMHV scheme for $\gamma_5$. One goal is show how theories can be renormalized despite spurious breaking invariance obtain required symmetry-restoring counterterms. A second familiarize reader theoretical basis theorems that guarantee existence at all orders as consistent quantum theories. Relevant topics include BPHZ...
$\gamma_5$ is notoriously difficult to define in $D$ dimensions. The traditional BMHV scheme employs a non-anticommuting $\gamma_5$. Its key advantage mathematical consistency and the existence of all-order proofs. disadvantage spurious breaking gauge invariance chiral theories like electroweak standard model. Our research programme aims determine special finite counterterms which are necessary restore invariance, allow more straightforward applications cross-check alternative schemes. In...
We summarize current constraints on the couplings of Higgs boson in framework an effective theory beyond Standard Model.
In recent years, theoretical and phenomenological studies with effective field theories have become a trending prolific line of research in the high-energy physics. order to discuss present future prospects concerning automated tools this field, SMEFT-Tools 2022 workshop was held at University Zurich from 14th-16th September 2022. The current document collects summarizes content workshop.
We present in these proceedings, our analysis (arXiv:2004.14398) at one-loop level within the Breitenlohner--Maison--'t~Hooft--Veltman (BMHV) scheme of Dimensional Regularization, counterterm structure arising due to presence $\gamma_5$ matrix and breaking BRST invariance, a massless chiral Yang-Mills theory supplemented with real scalars. The full necessary for renormalization is obtained. This comprises singular counterterms, including evanescent ones, by using techniques from algebraic...
The Bonneau identities are a very convenient tool for e.g. restoring BRST symmetry and deriving renormalization group equations in content of chiral gauge theories. background the is Breitenlohner-Maison-'t Hooft-Veltman dimensional regularization scheme which reviewed here with special emphasis to bridge notational differences between Breitenlohner-Maison papers identifying notions these references. rederived but general theory reexpressed terms effective action, establishing expressions...
$\gamma_5$ is notoriously difficult to define in $D$ dimensions. The traditional BMHV scheme employs a non-anticommuting $\gamma_5$. Its key advantage mathematical consistency and the existence of all-order proofs. disadvantage spurious breaking gauge invariance chiral theories like electroweak standard model. Our research programme aims determine special finite counterterms which are necessary restore invariance, allow more straightforward applications cross-check alternative schemes. In...
We discuss how renormalisation group equations can be consistently formulated using the algebraic framework, in context of a dimensionally-renormalised chiral field theory BMHV scheme, where BRST symmetry, originally broken at quantum level, is restored via finite counterterms. compare it with more standard multiplicative approach, which application would cumbersome this setting. Both procedures are applied and compared on example massless right-handed QED model, beta-function anomalous...