Publications (32)
Non-standard neutrino cosmology dilutes the lensing anomaly
Ivan Esteban, Olga Mena, Jordi Salvado
Despite the impressive success of the standard cosmological model, several anomalies defy its triumph. Among them is the so-called lensing anomaly: the Planck satellite observes st…
On the effect of NSI in the present determination of the mass ordering
Ivan Esteban, M. C. Gonzalez-Garcia, Michele Maltoni
In a recent work by Capozzi et al (arXiv:1908.06992), it is observed that the introduction of non-standard neutrino-matter interactions considerably relaxes the preference of T2K a…
Detector Requirements for Model-Independent Measurements of Ultrahigh Energy Neutrino Cross Sections
Ivan Esteban, Steven Prohira, John F. Beacom
The ultrahigh energy range of neutrino physics (above ), as yet devoid of detections, is an open landscape with challenges to be met and discoveries to…
On the Determination of Leptonic CP Violation and Neutrino Mass Ordering in Presence of Non-Standard Interactions: Present Status
Ivan Esteban, M. C. Gonzalez-Garcia, Michele Maltoni
We perform a global analysis of neutrino data in the framework of three massive neutrinos with non-standard neutrino interactions which affect their evolution in the matter backgro…
Exploring neutrino loss with diffuse astrophysical neutrino fluxes
Ivan Esteban, Alberto M. Gago, M. C. Gonzalez-Garcia +1
We study the sensitivity of the diffuse high-energy neutrino flux observed in IceCube to new-physics effects resulting in an exponential flux attenuation along the trajectory, such…
Decaying Sterile Neutrinos and the Short Baseline Oscillation Anomalies
Mona Dentler, Ivan Esteban, Joachim Kopp +1
The MiniBooNE experiment has observed a significant excess of electron neutrinos in a muon neutrino beam at source-detector distances too short to be compatible with standard neutr…
Bounds on new physics with data of the Dresden-II reactor experiment and COHERENT
Pilar Coloma, Ivan Esteban, M. C. Gonzalez-Garcia +3
Coherent elastic neutrino-nucleus scattering was first experimentally established five years ago by the COHERENT experiment using neutrinos from the spallation neutron source at Oa…
Lessons from the first JUNO results
Ivan Esteban, M. C. Gonzalez-Garcia, Michele Maltoni +3
First results from the JUNO reactor neutrino experiment already determine with world-leading precision the small neutrino squared-mass splitting and the mixing angle $…
Global analysis of three-flavour neutrino oscillations: synergies and tensions in the determination of theta_23, delta_CP, and the mass ordering
Ivan Esteban, M. C. Gonzalez-Garcia, Alvaro Hernandez-Cabezudo +2
We present the results of a global analysis of the neutrino oscillation data available as of fall 2018 in the framework of three massive mixed neutrinos with the goal at determinin…
Updated fit to three neutrino mixing: exploring the accelerator-reactor complementarity
Ivan Esteban, M. C. Gonzalez-Garcia, Michele Maltoni +2
We perform a combined fit to global neutrino oscillation data available as of fall 2016 in the scenario of three-neutrino oscillations and present updated allowed ranges of the six…
Origin of cosmological neutrino mass bounds: background perturbations
Toni Bertólez-MartÃnez, Ivan Esteban, Rasmi Hajjar +2
The cosmological upper bound on the total neutrino mass is the dominant limit on this fundamental parameter. Recent observations-soon to be improved-have strongly tightened it, app…
Neutrino Theory in the Precision Era
Asmaa Abada, Gabriela Barenboim, Toni Bertólez-MartÃnez +76
This document summarises discussions on future directions in theoretical neutrino physics, which are the outcome of a neutrino theory workshop held at CERN in February 2025. The st…
On neutrino-mediated potentials in a neutrino background
Diego Blas, Ivan Esteban, M. C. Gonzalez-Garcia +1
The exchange of a pair of neutrinos with Standard Model weak interactions generates a long-range force between fermions. The associated potential is extremely feeble, $\propto G_F^…
Milky Way satellite velocities reveal the Dark Matter power spectrum at small scales
Ivan Esteban, Annika H. G. Peter, Stacy Y. Kim
Dark Matter (DM) properties at small scales remain uncertain. Recent theoretical and observational advances have provided the tools to narrow them down. Here, we show for the first…
Determining the nuclear neutron distribution from Coherent Elastic neutrino-Nucleus Scattering: current results and future prospects
Pilar Coloma, Ivan Esteban, M. C. Gonzalez-Garcia +1
Coherent elastic neutrino-nucleus scattering (CENS), a process recently measured for the first time at ORNL's Spallation Neutron Source, is directly sensitive to the weak form…
Neutrino Self-Interactions: A White Paper
Jeffrey M. Berryman, Nikita Blinov, Vedran Brdar +31
Neutrinos are the Standard Model (SM) particles which we understand the least, often due to how weakly they interact with the other SM particles. Beyond this, very little is known…
Detectable MeV Neutrino Signals from Neutron-Star Common-Envelope Systems
Ivan Esteban, John F. Beacom, Joachim Kopp
Common-envelope evolution - where a star is engulfed by a companion - is a critical but poorly understood step in, e.g., the formation pathways for gravitational-wave sources. Howe…
Coherent Elastic Neutrino-Nucleus Scattering at the Japan Proton Accelerator Research Complex
J. I. Collar, Ivan Esteban, J. J. Gomez-Cadenas +8
The Japan Proton Accelerator Research Complex (J-PARC) currently delivers a 1 MW, 3 GeV proton beam to the Materials and Life Science Experimental Facility (MLF). Power is expected…
NuFit-6.0: Updated global analysis of three-flavor neutrino oscillations
Ivan Esteban, M. C. Gonzalez-Garcia, Michele Maltoni +3
We present an updated global analysis of neutrino oscillation data as of September 2024. The parameters , , , and () are…
Improved global fit to Non-Standard neutrino Interactions using COHERENT energy and timing data
Pilar Coloma, Ivan Esteban, M. C. Gonzalez-Garcia +1
We perform a global fit to neutrino oscillation and coherent neutrino-nucleus scattering data, using both timing and energy information from the COHERENT experiment. The results ar…
Physics Briefing Book: Input for the 2026 update of the European Strategy for Particle Physics
Jorge de Blas, Monica Dunford, Emanuele Bagnaschi +127
The European Strategy for Particle Physics (ESPP) reflects the vision and presents concrete plans of the European particle physics community for advancing human knowledge in fundam…
Probing Secret Interactions of Astrophysical Neutrinos in the High-Statistics Era
Ivan Esteban, Sujata Pandey, Vedran Brdar +1
Do neutrinos have sizable self-interactions? They might. Laboratory constraints are weak, so strong effects are possible in astrophysical environments and the early universe. Obser…
European Spallation Source: a future for Coherent Neutrino Nucleus Scattering
Ivan Esteban
The European Spallation Source (ESS), currently finishing its construction, will soon provide the most intense neutron beams for multi-disciplinary science. At the same time, it wi…
IceCube and the origin of ANITA-IV events
Toni Bertólez-MartÃnez, Carlos A. Argüelles, Ivan Esteban +3
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…
Updated Constraints on Non-Standard Interactions from Global Analysis of Oscillation Data
Ivan Esteban, M. C. Gonzalez-Garcia, Michele Maltoni +2
We quantify our present knowledge of the size and flavor structure of non-standard neutrino interactions which affect the matter background in the evolution of solar, atmospheric,…
Leptonic CP Violation and its Origin
Ivan Esteban
This PhD thesis deals with the current experimental hint for large CP violation in the leptonic sector. We first quantify its global statistical significance, by combining the resu…
Long Range Interactions in Cosmology: Implications for Neutrinos
Ivan Esteban, Jordi Salvado
Cosmology is well suited to study the effects of long range interactions due to the large densities in the early Universe. In this article, we explore how the energy density and eq…
Looking at the axionic dark sector with ANITA
Ivan Esteban, Jacobo Lopez-Pavon, Ivan Martinez-Soler +1
The ANITA experiment has recently observed two anomalous events emerging from well below the horizon. Even though they are consistent with tau cascades, a high energy Standard Mode…
The fate of hints: updated global analysis of three-flavor neutrino oscillations
Ivan Esteban, M. C. Gonzalez-Garcia, Michele Maltoni +2
Our herein described combined analysis of the latest neutrino oscillation data presented at the Neutrino2020 conference shows that previous hints for the neutrino mass ordering hav…
Attenuation of the ultra-high-energy neutrino flux by dark matter scatterings
Ivan Esteban, Alejandro Ibarra
A flux of ultra-high-energy (UHE) neutrinos, produced by astrophysical sources at cosmological distances, is anticipated to exist and reach Earth. In this paper, we investigate the…
New limits on neutrino decay from high-energy astrophysical neutrinos
Victor B. Valera, Damiano F. G. Fiorillo, Ivan Esteban +1
Since neutrinos have mass differences, they could decay into one another. But their lifetimes are likely long, even when shortened by new physics, so decay likely impacts neutrinos…
Towards Powerful Probes of Neutrino Self-Interactions in Supernovae
Po-Wen Chang, Ivan Esteban, John F. Beacom +2
Neutrinos remain mysterious. As an example, enhanced self-interactions (SI), which would have broad implications, are allowed. At the high neutrino densities within core-collap…