A5078280757- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Quantum Chromodynamics and Particle Interactions
- Particle Accelerators and Free-Electron Lasers
- High-Energy Particle Collisions Research
- Advanced NMR Techniques and Applications
- Cosmology and Gravitation Theories
- Comparative International Legal Studies
- Atomic and Subatomic Physics Research
- Black Holes and Theoretical Physics
- Muon and positron interactions and applications
Valparaiso University
2025
Federico Santa María Technical University
2013-2022
Centro Científico Tecnológico de Valparaíso
2014-2020
Pontificia Universidad Católica de Chile
2017
Hospital Carmen y Severo Ochoa
1998
The Compact Linear Collider (CLIC) is a multi-TeV high-luminosity linear e+e- collider under development. For an optimal exploitation of its physics potential, CLIC foreseen to be built and operated in staged approach with three centre-of-mass energy stages ranging from few hundred GeV up 3 TeV. first stage will focus on precision Standard Model physics, particular Higgs top-quark measurements. Subsequent measurements rare processes, as well searches for new processes states, e.g. states...
We revisit the mechanism of neutrinoless double beta ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) decay mediated by exchange with heavy Majorana neutrino $N$ arbitrary mass ${m}_{N}$, slightly mixed $\ensuremath{\sim}{U}_{\mathit{eN}}$ electron ${\ensuremath{\nu}}_{e}$. By assuming dominance this mechanism, we update well-known $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$-decay exclusion plot in ${m}_{N}\ensuremath{-}{U}_{\mathit{eN}}$ plane taking into account recent...
Below the electroweak scale, new physics that violates lepton number in two units (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi mathvariant="normal">Δ</a:mi><a:mi>L</a:mi><a:mo>=</a:mo><a:mn>2</a:mn></a:math>) and is mediated by heavy particle exchange can be parametrized a dimension-nine low-energy effective Lagrangian. Operators this Lagrangian involving first-generation quarks leptons contribute to short-range mechanism of neutrinoless double beta decay...
A bstract We discuss an extension of the standard model with a real scalar triplet, T , including non-renormalizable operators (NROs) up to d = 6. If is odd under Z 2 symmetry, neutral component good candidate for dark matter (DM) universe. calculate relic density and constraints from direct indirect detection on such setup, concentrating differences respect simple DM only renormalizable interactions. Bosonic can change triplet drastically, opening new parameter space model. Indirect...
The decay rate of neutrinoless double beta ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) contains terms from heavy particle exchange, which lead to dimension-9 ($d=9$) six fermion operators at low energies. Limits on the coefficients these have been derived previously neglecting running between high scale, where they are generated, and energy scale $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ decay, measured. Here we calculate leading-order QCD corrections all possible...
We analyze the impact of QCD corrections on limits derived from neutrinoless double beta decay ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$). As demonstrated previously, effect color mismatch arising loops with gluons linking quarks different color-singlet currents participating in effective operators has a dramatic predictions for some particular Wilson coefficients. Here, we consider all possible contributions heavy particle exchange, i.e. so-called short-range mechanism...
Recently it has been demonstrated that QCD corrections are numerically important for short-range mechanisms (SRM) of neutrinoless double beta decay ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) mediated by heavy particle exchange. This is due to the effect color mismatch certain effective operators, which leads mixing between different operators with vastly nuclear matrix elements (NMEs). In this note we analyze long-range (LRM), diagrams light-neutrino exchange a Standard Model...
We revisit the status of Lepton Flavor Violating (LFV) \mu e qq contact interactions from view point - -conversion in nuclei. consider their contribution to this LFV process via two mechanisms on hadronic level: direct nucleon and meson exchange ones. In former case quarks are embedded directly into nucleons while latter mesons which then interact with a nucleus. revise some cases reevaluate parameters relevant for both calculate above mentioned coherent various Then we update existing upper...
There is a common belief that the main uncertainties in theoretical analysis of neutrinoless double beta ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) decay originate from nuclear matrix elements. Here, we uncover another previously overlooked source potentially large stemming nonperturbative QCD effects. Recently perturbative corrections have been calculated for all dimension 6 and 9 effective operators describing $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$-decay...
In contrast to the original type I seesaw mechanism that requires right-handed Majorana neutrinos at energies much higher than electroweak scale, so-called low scale models allow lighter masses for additional neutrinos. Here we propose an alternative model, where neither linear nor inverse mechanisms take place, but spontaneous breaking of a discrete symmetry energy lower model cutoff is responsible smallness light active neutrino masses. this scenario, defined with minimal particle content,...
Abstract We consider the lepton-flavor violating (LFV) lepton-quark dimension-6 operators and analyze their contributions to LFV leptonic decays of vector, pseudoscalar, scalar neutral mesons $$M\rightarrow \ell _1 _2$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>M</mml:mi> <mml:mo>→</mml:mo> <mml:msub> <mml:mi>ℓ</mml:mi> <mml:mn>1</mml:mn> </mml:msub> <mml:mn>2</mml:mn> </mml:mrow> </mml:math> as well $$\mu (\tau ) \rightarrow ee, \gamma $$...
We discuss an extension of the standard model with a real scalar triplet, $T$, including non-renormalizable operators (NROs) up to $d=6$. If $T$ is odd under $Z_2$ symmetry, neutral component good candidate for dark matter (DM) universe. calculate relic density and constraints from direct indirect detection on such setup, concentrating differences respect simple DM only renormalizable interactions. Bosonic can change triplet drastically, opening new parameter space model. Indirect...
Below the electroweak scale, new physics that violates lepton number in two units ($\Delta L = 2$) and is mediated by heavy particle exchange can be parameterized a dimension-9 low-energy effective Lagrangian. Operators this Lagrangian involving first-generation quarks leptons contribute to short-range mechanism of neutrinoless double beta decay ($0\nu\beta\beta$) therefore they are strongly constrained. On other hand, operators with quark families bounded non-observation different violating...