A5086099469- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Cosmology and Gravitation Theories
- Superconducting Materials and Applications
- Computational Physics and Python Applications
- Advanced NMR Techniques and Applications
- Astrophysics and Cosmic Phenomena
- High-pressure geophysics and materials
- Noncommutative and Quantum Gravity Theories
- Particle Accelerators and Free-Electron Lasers
Universidad Andrés Bello
2020-2023
Millennium Science Initiative
2022-2023
European Organization for Nuclear Research
2023
Technical University of Munich
2023
Universidade Federal do Rio Grande do Norte
2022
Universidade Federal da Paraíba
2022
Federico Santa María Technical University
2007-2016
Centro Científico Tecnológico de Valparaíso
2011-2016
Universidad Técnica Federico Santa María
2011-2015
Universitat de València
2013
We carried out a model-independent search for light scalar ($s$) and pseudoscalar axionlike ($a$) particles that couple to two photons by using the high-energy CERN SPS H4 electron beam. The new particles, if they exist, could be produced through Primakoff effect in interactions of hard bremsstrahlung generated 100 GeV electrons NA64 active dump with virtual provided nuclei dump. $a(s)$ would penetrate downstream HCAL module, serving as shield, observed either their...
We report the direct observation of muon neutrino interactions with SND@LHC detector at Large Hadron Collider. A dataset proton-proton collisions sqrt[s]=13.6 TeV collected by in 2022 is used, corresponding to an integrated luminosity 36.8 fb^{-1}. The search based on information from active electronic components detector, which covers pseudorapidity region 7.2<η<8.4, inaccessible other experiments collider. Muon candidates are identified through their charged-current interaction topology, a...
Neutrinoless double beta decay ($\znbb$) induced by superparticle exchange is investigated. Such a supersymmetric (SUSY) mechanism of $\znbb$ arises within SUSY theories with R-parity non-conservation (\rp). We consider the minimal standard model (MSSM) explicit \rp terms in superpotential (\rp MSSM). The rate for calculated. Numerical values nuclear matrix elements experimentally most interesting isotopes are calculated pn-QRPA. Constraints on MSSM parameter space extracted from current...
Lepton number violation (LNV) mediated by short-range operators can manifest itself in both neutrinoless double beta decay ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) and processes with same-sign dilepton final states at the LHC. We derive limits from existing LHC data $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$ compare discovery potential of forthcoming $\sqrt{s}=14\text{ phase sensitivity current future $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ experiments,...
We compare the discovery potential of LHC for lepton number violating (LNV) signals with sensitivity current and future double beta decay experiments, assuming $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ is dominated by heavy particle exchange. consider charged scalar, leptoquark diquark mechanisms decay, covering operators both, smallest largest, possible rates. demonstrate, if were found a half-life below ${10}^{26}--{10}^{27}\text{ }\mathrm{\text{years}}$ positive signal...
We examine the compatibility between existing experimental data and a recently proposed explanation of LSND MiniBooNE anomalies, given in terms sterile neutrino $N$ whose decay is dominated by radiative mode. find that current on $\tau\rightarrow \mu\nu\nu\gamma$ decays are compatible with parameters required for but $K\rightarrow \mu\nu\gamma$ shows marginal tension those parameters. also propose cuts $K$ could test hypothesis better. Finally, we study contribution this to $K\to\mu\nu e e$,...
We study constraints on left-right symmetric models from searches of semileptonic decays $D$, ${D}_{s}$, and $B$ mesons, mediated by heavy neutrinos $N$ with masses ${m}_{N}\ensuremath{\sim}\mathrm{GeV}$ that go their mass shell leading to a resonant enhancement the rates. Using these processes, we examine, as function ${m}_{N}$ ${M}_{{W}_{R}}$, physics reach recently proposed high-intensity beam dump experiment SHiP, which is expected produce large sample ${D}_{s}$ mesons. compare results...
It is well-known that at tree-level the d=5 Weinberg operator can be generated in exactly three different ways, famous seesaw models. In this paper we study related question of how many phenomenologically consistent 1-loop models one construct d=5. First, discuss there are two possible classes neutrino mass models, allow avoiding stable charged relics: (i) Models with dark matter candidates and (ii) "exits". Here, define "exits" as particles decay into standard model fields. Considering new...
We present the measurement of intrinsic hadronic contamination at CERN SPS H4 beamline configured to transport electrons and positrons 100 GeV/c. The analysis, performed using data collected by NA64-e experiment in 2022, is based on calorimetric measurements, exploiting different interaction mechanisms hadrons NA64 detector. determined comparing results obtained nominal electron/positron configuration with those from a dedicated setup, which only impinged also an estimate relative protons,...
We study lepton number violating (LNV) process of muon-positron conversion in nuclei mediated by the exchange light and heavy Majorana neutrinos. Nuclear structure calculations have been carried out for case experimentally interesting nucleus 48Ti framework renormalized proton-neutron Quasiparticle Random Phase Approximation. demonstrate that imaginary part amplitude neutrino mechanism gives an appreciable contribution to rate. This specific feature is absent allied neutrinoless double beta...
The decay rate of neutrinoless double beta (0νββ) could be dominated by Lepton Number Violating (LNV) short-range diagrams involving only heavy scalar intermediate particles, known as "topology-II" diagrams. Examples are with diquarks, leptoquarks or charged scalars. Here, we compare the LNV discovery potentials LHC and 0νββ-decay experiments, resorting to three example models, which cover range optimistic-pessimistic cases for 0νββ decay. We use constraints from dijet well leptoquark...
We consider deep inelastic (quasi)elastic lepton-nucleon scattering and investigate the possibilities of eliminating or suppressing theoretical uncertainties induced by nucleon structure in measuring standard model parameters searching for new physics. On basis rather general assumptions about we have obtained relations between cross sections neutral current which are weakly dependent on structure. also dependence QCD $\ensuremath{\Lambda}$ parameter extracted from data unknown large-scale...
Currently, studying the effects of new particles contributing to muon anomalous magnetic moment ($g-2$) through virtual loops as evidence for physics beyond standard model attracts high interest. Therefore, we present results Implications g-2 five models based on gauge symmetry $\text{SU(3)}_{\text{C}} \times \text{SU(3)}_{\text{L}} \text{U(1)}_{\text{X}}$ (3-3-1). We consider a current and projected accuracy experiment at FERMILAB analyze these implications. In this way, obtain $Z^\prime$...