A5077361340- Particle physics theoretical and experimental studies
- Distributed and Parallel Computing Systems
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Quantum Computing Algorithms and Architecture
- Quantum Information and Cryptography
- Black Holes and Theoretical Physics
- Magnetic properties of thin films
- Quantum Chromodynamics and Particle Interactions
- Computational Physics and Python Applications
- Neutrino Physics Research
- High-Energy Particle Collisions Research
- Quantum Mechanics and Applications
- Neural Networks and Applications
- Magnetic and transport properties of perovskites and related materials
- Electromagnetic Scattering and Analysis
- Quantum and electron transport phenomena
- Scientific Research and Discoveries
- Scientific Computing and Data Management
- Astrophysics and Cosmic Phenomena
- Neural Networks and Reservoir Computing
- Neurobiology of Language and Bilingualism
- Electromagnetic Simulation and Numerical Methods
- Nanoporous metals and alloys
- Experimental and Theoretical Physics Studies
Universidad de Granada
2018-2024
Durham University
2020-2023
National Institute of Chemical Physics and Biophysics
2020-2021
We analyze a modular invariant model of lepton masses, with neutrino masses originating either from the Weinberg operator or seesaw. The constraint provided by invariance is so strong that mass ratios, mixing angles and Dirac/Majorana phases do not depend on any Lagrangian parameter. They only vacuum theory, parametrized in terms complex modulus real field. Thus eight measurable quantities are described three parameters, whose optimization provides an excellent fit to data for good seesaw...
A bstract We compute all the tree-level contributions to Wilson coefficients of dimension-six Standard-Model effective theory in ultraviolet completions with general scalar, spinor and vector field content arbitrary interactions. No assumption about renormalizability high-energy is made. This provides a complete ultraviolet/infrared dictionary at classical level, which can be used study low-energy implications any model interest, also look for explicit consistent data.
We explore alternative descriptions of the charged lepton sector in modular invariant models masses and mixing angles. In addition to modulus, symmetry breaking our includes ordinary flavons. Neutrino mass terms depend only on modulus are tailored minimize number free parameters. The Yukawa couplings rely upon flavons alone. build at levels 4 5, where neutrino described both Weinberg operator or through a type I seesaw mechanism. At level 4, reproduce hierarchy among electron, muon tau by...
A bstract The invariance of physical observables under redefinitions the quantum fields is a well-known and important property field theory. We study perturbative in effective theories, paying special attention to higher-order effects their impact on matching an ultraviolet theory at classical levels.
BasisGen is a Python package for the automatic generation of bases operators in effective field theories. It accepts any semisimple symmetry group and fields its finite dimensional irreducible representations. takes into account integration by parts redundancy and, optionally, use equations motion. The implementation based on well-known methods to generate decompose representations using roots weights, which allow fast calculations, even with large numbers high-dimensional operators. can...
Artificial neural networks are at the heart of modern deep learning algorithms. We describe how to embed and train a general network in quantum annealer without introducing any classical element training. To implement on state-of-the-art annealer, we develop three crucial ingredients: binary encoding free parameters network; polynomial approximation activation function; reduction higher-order polynomials into quadratic ones. Together, these ideas allow loss function as an Ising model...
A bstract As experiment charts new territory at the electroweak scale, enterprise to characterise all possible theories becomes more necessary. In absence of particles, this ambitious is attainable and has led Higgs Effective Field Theory (HEFT) as most general characterising framework, containing Standard Model (SMEFT) a subspace. The characterisation theory space dichotomy SMEFT vs. HEFT two realisations symmetry breaking. criterion distinguish these possibilities non-local in field space,...
We develop an effective field theory of a generic massive particle any spin and, as example, apply this to study higher-spin dark matter (DM). Our formalism does not introduce unphysical degrees freedom, thus avoiding the potential inconsistencies that may appear in other field-theoretical descriptions higher spin. Being useful reformulation Weinberg's original idea, proposed allows for consistent computations physical observables general-spin particles, although it admit Lagrangian...
We study how the indirect observation of dark matter substructures in Milky Way, using recent stellar stream studies, translates into constraints for different models. Particularly, we use measured number subhalos mass range $10^7-10^9\,{\rm M_{\odot}}$ to constrain modifications subhalo function compared cold scenario. obtain lower bounds $m_{\rm WDM} > 3.2\,{\rm keV}$ and FDM} 5.2\times 10^{-21}\,{\rm eV}$ on warm fuzzy particle mass, respectively. When is coupled a radiation bath, find...
We reanalyze the effective field theory (EFT) approach for scenario in which particles that account dark matter (DM) universe are vector states interact only through Standard Model-like Higgs boson. These DM searched direct and indirect detection astrophysical experiments invisible decays at LHC. The constraints obtained these two search types complementary correlated. In recent years, it has been advocated EFT is problematic small mass does not capture all aspects of DM; one should thus...
We study the impact of leading non-renormalizable terms in effective field theory that describes general extensions Standard Model with vector-like quarks. Dropping usual assumption renormalizability has several phenomenological consequences for production and decay heavy quarks also Higgs physics. The most dramatic effects, including those associated a long lifetime, occur non-standard quantum numbers.
A bstract Skyrmions are extended field configurations, initially proposed to describe baryons as topological solitons in an effective theory of mesons. We investigate and confirm the existence skyrmions within electroweak sector Standard Model study their properties. find that interplay with a dynamical Higgs Skyrme term leads non-trivial vacuum structure skyrmion perturbative sectors separated by finite energy barrier. identify dimension-8 operators stabilise spatially localised soliton...
The use of experimental data to constrain the values Wilson coefficients an effective field theory involves minimizing a ${\ensuremath{\chi}}^{2}$ function that may contain local minima. Classical optimization algorithms can become trapped in these minima, preventing determination global minimum. quantum annealing framework has potential overcome this limitation and reliably find minimum nonconvex functions. We present QFitter, method perform fits. Using state-of-the-art annealer, we show...
Abstract We present a general method, called Qade, for solving differential equations using quantum annealer. One of the main advantages this method is its flexibility and reliability. On current devices, Qade can solve systems coupled partial that depend linearly on solution derivatives, with non-linear variable coefficients arbitrary inhomogeneous terms. test through several examples we implement in state-of-the-art annealers. The include equation system equations. This first time these...
A bstract The dynamics of phase transitions (PT) in quantum field theories at finite temperature is most accurately described within the framework dimensional reduction. In this framework, thermodynamic quantities are computed 3-dimensional effective theory (EFT) that results from integrating out high-temperature Matsubara modes. However, strong-enough PTs, observable gravitational wave (GW) detectors, occur often nearby limit validity EFT, where operators can no longer be neglected. Here,...
The new measurement of the muon's anomalous magnetic moment released by Muon g-2 experiment at Fermilab sets strong constraints on properties many particles. Using an effective field theory approach to interactions higher-spin fields, we evaluate contribution electrically neutral and colour singlet spin-3/2 fermion $(g-2)_\mu$ derive corresponding its mass couplings. These are then compared with ones spin-1/2 fermions, such as vector-like leptons that predicted various extensions Standard...
We present Elvet, a Python package for solving differential equations and variational problems using machine learning methods. Elvet can deal with any system of coupled ordinary or partial arbitrary initial boundary conditions. It also minimize functional that depends on collection functions several variables while imposing constraints them. The solution to these is represented as neural network trained produce the desired function.
A bstract Using an effective field theory approach for higher-spin fields, we derive the interactions of colour singlet and electrically neutral particles with a spin higher than unity, concentrating on spin-3/2, spin-2, spin-5/2 spin-3 cases. We compute decay rates production cross sections in main channels spin-3/2 spin-2 states at both electron-positron hadron colliders, identify most promising novel experimental signatures discovering such LHC. The discussion is qualitatively extended to...
A bstract We present an effective field theory describing the relevant interactions of Standard Model with electrically neutral particle that can account for dark matter in Universe. The possible mediators these are assumed to be heavy. candidates we consider have spin 0, 1/2 or 1, belong electroweak multiplet arbitrary isospin and hypercharge their stability at cosmological scales is guaranteed by imposing a ℤ 2 symmetry. most general framework interaction standard particles, construct...
Background Perseverations in speech production tasks represent a pervasive symptom of chronic aphasia. Semantic perseverations (SPs) are defined as repetitive and unconscious specific linguistic forms previously produced, heard, or seen which share semantic relatedness with the target word. Neurochemically, SPs have been attributed to weakened activation word due depletion neurotransmitter systems (acetylcholine dopamine) occurring context competitors.Aims The present pilot study seeks...
The increasing interest in the phenomenology of Standard Model Effective Field Theory (SMEFT), has led to development a wide spectrum public codes which implement automatically different aspects SMEFT for phenomenological applications. In order discuss present and future such efforts, "SMEFT-Tools 2019" Workshop was held at IPPP Durham on 12th-14th June 2019. Here we collect summarize contents this workshop.