A5040888720- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Astrophysics and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Cosmology and Gravitation Theories
- Superconducting Materials and Applications
- Galaxies: Formation, Evolution, Phenomena
- Black Holes and Theoretical Physics
- Nuclear physics research studies
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Cardiomyopathy and Myosin Studies
- Advanced Data Storage Technologies
Pontifical Catholic University of Peru
2007-2023
University of Würzburg
2020
Universitat de València
2008-2016
Instituto de Física Corpuscular
2015
European Organization for Nuclear Research
2012-2014
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2011-2013
Max Planck Institute for Physics
2012
University of Padua
2012
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2012
A bstract The addition of d = 5 operators to the Seesaw model leads Dimension-5 Portal. Here, two new provide interactions for heavy sterile neutrinos. In particular, Higgs boson can have a large branching ratio into neutrinos, meaning that these states be searched at LHC. Moreover, neutrinos now decay dominantly light and photons. If are long-lived, then searches delayed, non-pointing photons constrain model. this work, we carry out detailed recast an ATLAS search such displaced photons,...
The observation of Higgs decays into heavy neutrinos would be strong evidence for new physics associated to neutrino masses. In this work we propose a search such within the Type I Seesaw model in few-GeV mass range via displaced vertices. Using 300 fb $$^{-1}$$ integrated luminosity, at 13 TeV, explore region parameter space where are measurable. We show that, after imposing pseudorapidity cuts, there still exists number events is larger than $$\mathcal {O}\left( {10}\right) $$ . also find...
Abstract Weakly- and Feebly-Interacting Massive Particles (WIMPs FIMPs) are among the best-motivated dark matter (DM) candidates. In this paper, we investigate production of DM through WIMP FIMP mechanisms during inflationary reheating. We show that details reheating, such as inflaton potential reheating temperature, have a strong impact on genesis DM. The entropy injection caused by decay has to be compensated reduction portal coupling in case WIMPs, or an increase FIMPs. pinpoint smooth...
Abstract In the context of non-standard cosmologies, an early matter-dominated (EMD) era can significantly alter conventional dark matter (DM) genesis. this work, we reexamine impact EMD on weakly- and feebly-interacting massive particle (WIMP FIMP) paradigms. eras modify genesis DM because change in Hubble expansion rate injection entropy. The WIMP paradigm be realized with couplings much smaller than standard cosmological scenario, whereas larger are required FIMP case. Using...
A bstract The Dimension-5 Seesaw Portal is a Type-I model extended by d = 5 operators involving the sterile neutrino states, leading to new interactions between all neutrinos and Standard Model neutral bosons. In this work we focus primarily on implications of these at GeV-scale. particular, recalculate heavy full decay width, up three-body decays. We also review bounds dipole operator, revisit LEP constraints its coefficient. Finally, turn pair production from Higgs decays, where former are...
A bstract We investigate the present constraints from MINOS and T2K experiments for neutrino decay scenario induced by non-diagonal couplings of Majorons to neutrinos. As novelty, on top typical invisible prescription, we add contribution visible decay, where final products can be observed. This new effect depends nature neutrino-Majoron coupling, which scalar or pseudoscalar type. Using combination disappearance data appearance T2K, normal ordering, constrain parameter α ≡ E Γ heaviest...
Neutrino masses could originate in seesaw models testable at colliders, with light mediators and an approximate lepton number symmetry. The minimal model of this type contains two quasi-degenerate Majorana fermions forming a pseudo-Dirac pair. An important question is to what extent future colliders will have sensitivity the splitting between components, since quantity signals breaking connected neutrino masses. We consider production these neutral heavy leptons ILC, where their displaced...
In the context of non-standard cosmologies, an early matter-dominated (EMD) era can significantly alter conventional dark matter (DM) genesis. this work, we reexamine impact EMD on weakly- and feebly-interacting massive particle (WIMP FIMP) paradigms. eras modify genesis DM because change in Hubble expansion rate injection entropy. The WIMP paradigm be realized with couplings much smaller than standard cosmological scenario, whereas larger are required FIMP case. Using singlet-scalar model...
Neutrino visible decay in the presence of matter is re-evaluated. We study these effects two future long-baseline experiments where are relevant: DUNE (1300 km) and a hypothetical beam aimed towards ANDES (7650 km). find that negligible for component neutrino at DUNE, being much more relevant ANDES. perform detailed simulation considering $\nu_\mu$ disappearance $\nu_e$ appearance channels, both FHC RHC modes. The sensitivity to constant $\alpha_3$ can be as low $2\times10^{-6}$ eV$^2$ 90%...
Abstract Leptoquarks ( $$\textrm{LQ}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mtext>LQ</mml:mtext> </mml:math> s) are hypothetical particles that appear in various extensions of the Standard Model (SM), can explain observed differences between SM theory predictions and experimental results. The production these has been widely studied at experiments, most recently Large Hadron Collider (LHC), stringent bounds have placed on their masses couplings, assuming simplest...
The so-called supersymmetric flavor and $CP$ problems are deeply related to the origin of hence standard model Yukawa couplings themselves. We show that realistic $SU(3)$ symmetries with spontaneous violation reproducing correctly matrices can simultaneously solve both without ad hoc modifications model. analyze leptonic electric dipole moments lepton processes in these models. electron moment decay $\ensuremath{\mu}\ensuremath{\rightarrow}e\ensuremath{\gamma}$ naturally within reach...
We have explored the question of whether renormalization group running neutrino mixing parameters in Minimal Supersymmetric Standard Model is detectable with ultra-high energy neutrinos from active galactic nuclei (AGN). use as observables ratios fluxes produced at AGN, focusing on four different production models: $ \left( {\Phi_{{\nu_e} + {{\bar{\nu }}_e}}^0:\Phi_{{\nu_\mu } }}_\mu }}^0:\Phi_{{\nu_\tau }}_\tau }}^0} \right) = {1:2:0} \right),\left( {0:1:0} {1:0:0} , and (1 : 1 0). The...
The main goals of the first "Workshop on FLAvor SYmmetries and consequences in accelerators cosmology" (FLASY) was to summarize theoretical status flavor symmetries, bringing together young researchers field stimulate discussions new collaborations, with aim investigating possible physics scenarios be tested at LHC, as well future neutrino, cosmology experiments dark matter searches.
We study natural supersymmetric scenarios with light right-handed neutrino superfields, and consider the possibility of having either a or sneutrino as dark matter candidate. For former, we evaluate SUSY corrections on ${\ensuremath{\nu}}_{4}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{\ensuremath{\ell}}\ensuremath{\gamma}$ decay rate, such that NuStar bounds are relaxed. find too small. matter, thermal nonthermal production, taking into account freeze-out, freeze-in, super-weakly interacting...
The observation of Higgs decays into heavy neutrinos would be strong evidence for new physics associated to neutrino masses. In this work we propose a search such within the Type I seesaw model in few-GeV mass range via displaced vertices. Using 300 fb$^{-1}$ integrated luminosity, at 13 TeV, explore region parameter space where are measurable. We show that, after imposing pseudorapidity cuts, there still exists number events is larger than $\mathcal{O}(10)$. also find that conventional...
Abstract The charged current production of long-lived heavy neutrinos at the LHC can use a prompt lepton for triggering measurement process. However, in order to fully characterize neutrino interactions, it is necessary also probe Higgs or Z mediated neutral production. In this case not available, so other means are required. work, we explore possibility using vector boson fusion trigger context GeV-scale Type I Seesaw model. We consider minimal model, where both and -mediated contributions...
We consider a scenario inspired by natural supersymmetry, where neutrino data is explained within low-scale seesaw scenario. extend the Minimal Supersymmetric Standard Model adding light right-handed neutrinos and their superpartners, R-sneutrinos, lightest neutralinos to be higgsino-like. possibilities of having either an R-sneutrino or higgsino as supersymmetric particle. Assuming that squarks gauginos are heavy, we systematically evaluate bounds on slepton masses due existing LHC data.
Weakly- and Feebly-Interacting Massive Particles (WIMPs FIMPs) are among the best-motivated dark matter (DM) candidates. In this paper, we investigate production of DM through WIMP FIMP mechanisms during inflationary reheating. We show that details reheating, such as inflaton potential reheating temperature, have a strong impact on genesis DM. The entropy injection caused by decay has to be compensated reduction portal coupling in case WIMPs, or an increase FIMPs. pinpoint smooth transition...
In order to satisfy current FCNC and CP violation bounds, SUSY flavour structures cannot be generic. An interesting solution these Flavour Problems lies on the use of an SU(3) family symmetry which spontaneously breaks symmetry. Typical observables such a model are electric dipole moments LFV processes. addition, models can give contributions in neutral meson mixing. We show how latter used restrict allowed parameter space, induce correlations between EDM predictions.