Ivan Martínez-Soler
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View article: GLOBAL ANALYSIS OF NEUTRINO OSCILLATIONS
GLOBAL ANALYSIS OF NEUTRINO OSCILLATIONS Open
Plenary talk presented at the XXI International Workshop on Neutrino Telescopes - Padova 29 September - 3 October 2025 (https://agenda.infn.it/event/44606/)
View article: The Milky Way is a Laboratory for New Ultra-long-baseline Neutrino Physics
The Milky Way is a Laboratory for New Ultra-long-baseline Neutrino Physics Open
International audience
View article: Boomerang mechanism explaining the excess radio background
Boomerang mechanism explaining the excess radio background Open
We propose a {\em boomerang mechanism} for the explanation of the excess radio background detected by ARCADE. In an early stage, at a temperature $T \sim 100\,{\rm keV}$, a fraction of relic neutrinos is resonantly converted into dark neut…
View article: The Milky Way is a Laboratory for New Ultra-long-baseline Neutrino Physics
The Milky Way is a Laboratory for New Ultra-long-baseline Neutrino Physics Open
The IceCube Neutrino Observatory recently published evidence for diffuse neutrino emission from the Galactic Plane at $4.5σ$ significance. This new source of astrophysical neutrinos provides an exciting laboratory for probing the nature of…
View article: Sterile-active resonance: A global qualitative picture
Sterile-active resonance: A global qualitative picture Open
A bstract In the ν SM extended by adding an eV-scale sterile state, the (3 + 1) model, the sterile-active level crossing entails the MSW resonance, here referred as the sterile-active (SA) resonance. In this paper, we construct an effectiv…
View article: NuFit-6.0: updated global analysis of three-flavor neutrino oscillations
NuFit-6.0: updated global analysis of three-flavor neutrino oscillations Open
A bstract We present an updated global analysis of neutrino oscillation data as of September 2024. The parameters θ 12 , θ 13 , $$ \Delta {m}_{21}^2 $$ , and $$ \mid \Delta {m}_{3\ell}^2\mid $$ ( ℓ = 1 , 2) are well-determi…
View article: Sterile-active resonance: A global qualitative picture
Sterile-active resonance: A global qualitative picture Open
In the $ν$SM extended by adding an eV-scale sterile state, the $(3+1)$ model, the sterile-active level crossing entails the MSW resonance, here referred as the sterile-active (SA) resonance. In this paper, we construct an effective theory …
View article: Boosting neutrino mass ordering sensitivity with inelasticity for atmospheric neutrino oscillation measurement
Boosting neutrino mass ordering sensitivity with inelasticity for atmospheric neutrino oscillation measurement Open
In this letter, we study the potential of boosting the atmospheric neutrino experiments sensitivity to the neutrino mass ordering (NMO) sensitivity by incorporating inelasticity measurements. We show how this observable improves the sensit…
View article: Improving Neutrino Energy Reconstruction with Machine Learning
Improving Neutrino Energy Reconstruction with Machine Learning Open
Faithful energy reconstruction is foundational for precision neutrino experiments like DUNE, but is hindered by uncertainties in our understanding of neutrino--nucleus interactions. Here, we demonstrate that dense neural networks are very …
View article: Resonant Neutrino Flavor Conversion in the Atmosphere
Resonant Neutrino Flavor Conversion in the Atmosphere Open
Neutrinos produced in the atmosphere traverse a column density of air before being detected at neutrino observatories like IceCube or KM3NeT. In this work, we extend the neutrino flavor evolution in the {nuSQuIDS} code accounting for the v…
View article: Probing the Cosmic Neutrino Background and New Physics with TeV-Scale Astrophysical Neutrinos
Probing the Cosmic Neutrino Background and New Physics with TeV-Scale Astrophysical Neutrinos Open
We use recent evidence of TeV neutrino events from the most significant astrophysical sources detected by IceCube -- NGC 1068, TXS 0506+056, PKS 1424+240 -- to constrain the local and global overdensity of relic neutrinos and to explore po…
View article: Relic neutrino decay solution to the excess radio background
Relic neutrino decay solution to the excess radio background Open
The excess radio background detected by ARCADE 2 represents a puzzle within the standard cosmological model. There is no clear viable astrophysical solution, and therefore, it might indicate the presence of new physics. Radiative decays of…
View article: Probing pseudo-Dirac neutrinos with astrophysical sources at IceCube
Probing pseudo-Dirac neutrinos with astrophysical sources at IceCube Open
The recent observation of NGC 1068 by the IceCube Neutrino Observatory has opened a new window to neutrino physics with astrophysical baselines. In this paper, we propose a new method to probe the nature of neutrino masses using these obse…
View article: Boosting Neutrino Mass Ordering Sensitivity with Inelasticity for Atmospheric Neutrino Oscillation Measurement
Boosting Neutrino Mass Ordering Sensitivity with Inelasticity for Atmospheric Neutrino Oscillation Measurement Open
In this letter, we study the potential of boosting the atmospheric neutrino experiments sensitivity to the neutrino mass ordering (NMO) sensitivity by incorporating inelasticity measurements. We show how this observable improves the sensit…
View article: Measuring Oscillations with a Million Atmospheric Neutrinos
Measuring Oscillations with a Million Atmospheric Neutrinos Open
After two decades of measurements, neutrino physics is now advancing into the precision era. With the long-baseline experiments designed to tackle current open questions, a new query arises: Can atmospheric neutrino experiments also play a…
View article: Relic neutrino decay solution to the excess radio background
Relic neutrino decay solution to the excess radio background Open
The excess radio background detected by ARCADE 2 represents a puzzle within the standard cosmological model. There is no clear viable astrophysical solution, and therefore, it might indicate the presence of new physics. Radiative decays of…
View article: Atmospheric Neutrino Monte Carlo Simulations
Atmospheric Neutrino Monte Carlo Simulations Open
We provide the MC simlation files of atmospheric neutrinos for the following experiments in HDF5 (https://www.hdfgroup.org/solutions/hdf5/) format.
View article: New Clues about light sterile neutrinos: preference for models with damping effects in global fits
New Clues about light sterile neutrinos: preference for models with damping effects in global fits Open
A bstract This article reports global fits of short-baseline neutrino data to oscillation models involving light sterile neutrinos. In the commonly-used 3+1 plane wave model, there is a well-known 4.9 σ tension between data sets sensitive …
View article: Probing Pseudo-Dirac Neutrinos with Astrophysical Sources at IceCube
Probing Pseudo-Dirac Neutrinos with Astrophysical Sources at IceCube Open
The recent observation of NGC 1068 by the IceCube Neutrino Observatory has opened a new window to neutrino physics with astrophysical baselines. In this contribution, we show the results of a new method to probe the nature of neutrino mass…
View article: IceCube and the origin of ANITA-IV events
IceCube and the origin of ANITA-IV events Open
A bstract Recently, the ANITA collaboration announced the detection of new, unsettling upgoing Ultra-High-Energy (UHE) events. Understanding their origin is pressing to ensure success of the incoming UHE neutrino program. In this work, we …
View article: IceCube and the origin of ANITA-IV events
IceCube and the origin of ANITA-IV events Open
Recently, the ANITA collaboration announced the detection of new, unsettling upgoing Ultra-High-Energy (UHE) events. Understanding their origin is pressing to ensure success of the incoming UHE neutrino program. In this work, we study thei…
View article: Probing Pseudo-Dirac Neutrinos with Astrophysical Sources at IceCube
Probing Pseudo-Dirac Neutrinos with Astrophysical Sources at IceCube Open
The recent observation of NGC 1068 by the IceCube Neutrino Observatory has opened a new window to neutrino physics with astrophysical baselines. In this Letter, we propose a new method to probe the nature of neutrino masses using these obs…
View article: Diffuse supernova neutrino background as a probe of late-time neutrino mass generation
Diffuse supernova neutrino background as a probe of late-time neutrino mass generation Open
The relic neutrinos from old supernova explosions are among the most ancient neutrino fluxes within experimental reach. Thus, the diffuse supernova neutrino background (DSNB) could teach us if neutrino masses were different in the past (re…
View article: Tau neutrinos in the next decade: from GeV to EeV
Tau neutrinos in the next decade: from GeV to EeV Open
Tau neutrinos are the least studied particle in the standard model. This whitepaper discusses the current and expected upcoming status of tau neutrino physics with attention to the broad experimental and theoretical landscape spanning long…
View article: Signs of pseudo-Dirac neutrinos in SN1987A data
Signs of pseudo-Dirac neutrinos in SN1987A data Open
Ever since the discovery of neutrinos, we have wondered if neutrinos are their own antiparticles. One remarkable possibility is that neutrinos have a pseudo-Dirac nature, predicting a tiny mass difference between active and sterile states.…
View article: The diffuse supernova neutrino background as a probe of late-time neutrino mass generation
The diffuse supernova neutrino background as a probe of late-time neutrino mass generation Open
The relic neutrinos from old supernova explosions are among the most ancient neutrino fluxes within experimental reach. Thus, the diffuse supernova neutrino background (DSNB) could teach us if neutrino masses were different in the past (re…