SearcharxivSearch

arXiv · 2504.00014

Neutrino Theory in the Precision Era

Abstract

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 starting point is the realisation that neutrino physics offers unique opportunities to address some of the most fundamental questions in physics. This motivates a vigorous experimental programme which the theory community fully supports. \textbf{A strong effort in theoretical neutrino physics is paramount to optimally take advantage of upcoming neutrino experiments and to explore the synergies with other areas of particle, astroparticle, and nuclear physics, as well as cosmology.} Progress on the theory side has the potential to significantly boost the physics reach of experiments, as well as go well beyond their original scope. Strong collaboration between theory and experiment is essential in the precision era. To foster such collaboration, \textbf{we propose to establish a CERN Neutrino Physics Centre.} Taking inspiration from the highly successful LHC Physics Center at Fermilab, the CERN Neutrino Physics Centre would be the European hub of the neutrino community, covering experimental and theoretical activities.

Explore related subjects

Keep this discovery

BibTeXRIS

Asmaa Abada, Gabriela Barenboim, Toni Bertólez-Martínez, Sandipan Bhattacherjee, Sara Bolognesi, Patrick D. Bolton, Nilay Bostan, Gustavo C. Branco, Sabya Sachi Chatterjee, Adriano Cherchiglia, Marco Chianese, B. A. Couto e Silva, Peter B. Denton, Stephen Dolan, Marco Drewes, Ilham El Atmani, Miguel Escudero, Ivan Esteban, Manuel Ettengruber, Enrique Fernández-Martínez, Julien Froustey, Raj Gandhi, Julia Gehrlein, Srubabati Goswami, André de Gouvêa, Alessandro Granelli, Rasmi Hajjar, Pilar Hernández, Gonzalo Herrera, Matheus Hostert, Alejandro Ibarra, Yu Seon Jeong, Filipe R. Joaquim, Monireh Kabirnezhad, Kevin J. Kelly, Pyungwon Ko, Joachim Kopp, Zoha Laraib, Shirley Li, Chayan Majumdar, Xabier Marcano, Danny Marfatia, Hyun Min Lee, Manimala Mitra, Rukmani Mohanta, Biswarup Mukhopadhyaya, Maksym Ovchynnikov, Supriya Pan, Ornella Palamara, Stephen J. Parke, George A. Parker, Silvia Pascoli, Joselen Pena Quintero, João Paulo Pinheiro, Federica Pompa, Yago Porto, Suraj Prakash, M. N. Rebelo, Albert de Roeck, Juan Rojo, Valentina De Romeri, Salvador Rosauro-Alcaraz, Purushottam Sahu, Ina Sarcevic, Ninetta Saviano, Michael A. Schmidt, Ian M. Shoemaker, Alka Singh, Zahra Tabrizi, S. Uma Sankar, Salvador Urrea, Zoya Vallari, Biao Wang, Xin Wang, Zhi-zhong Xing, Farhana Zaidi, Di Zhang, Zhong Zhang, Shun Zhou. 2025-03-27. Neutrino Theory in the Precision Era. https://arxiv.org/abs/2504.00014

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

Axionic Wormholes in Metric-Affine Gravity

The axion is a promising candidate for solving the strong CP problem. To solve this problem, the global U(1) symmetry must be preserved to a high degree of accuracy. However, it is well known that global symmetries are explicitly violated by quantum gravity effects, giving rise to what is referred to as the axion quality problem. In this paper, we investigate axionic wormholes as a source of explicit U(1) violation in Metric-Affine Gravity. This framework allows for spacetime torsion and non-metricity, which accommodate additional curvature-like and topological terms, such as the Holst and Nieh--Yan terms, that are absent from the metric and Palatini formalisms. We show that non-minimal couplings to these terms modify the wormhole dynamics and enhance the Euclidean wormhole action, thereby alleviating the axion quality problem. We also find that the viable parameter space is enlarged when two of these couplings are simultaneously present. We further identify representative parameter regions where the alleviation of the axion quality problem is compatible with inflationary constraints.

hep-ph

Qubit-Qutrit Quantum Tomography of hadronic $\Lambda\phi$ and $\Lambda K^{\ast 0}$ systems

Quantum-information observables have emerged in recent years as new tools in nuclear and particle physics, from entanglement in top-quark pairs to spin correlations in $\Lambda\bar{\Lambda}$ production. Extending these studies to unequal-spin hadronic final states poses a fundamental challenge: the $6\times6$ density matrix of a qubit-qutrit system contains 35 independent spin parameters, but the decays of $\Lambda V$ pairs, with $V=\phi$ or $K^{*0}$, provide access to only 23 due to the hidden vector polarization from the strong decay. In this Letter, we formulate a qubit-qutrit quantum tomography (QQQT) technique for these spin-$\tfrac{1}{2}\otimes1$ systems and establish exact criteria for entanglement certification from the \textit{incomplete} density matrix. Compared with the $\Lambda\bar{\Lambda}$ system, QQQT of $\Lambda\phi$ and $\Lambda K^{*0}$ provides a new probe of nonperturbative QCD hadronization, enabling a direct comparison of the spin evolution of entangled quark pairs produced from the vacuum as they hadronize into a baryon or a vector meson.

hep-ph

Twist decomposition of exclusive heavy meson production cross sections

We study the twist decomposition of the total cross sections for exclusive heavy vector meson electroproduction and photoproduction in the $\gamma^\ast p$ processes, within the leading logarithmic $1/x$ BFKL formalism. The Mellin transforms of the impact factors of the vector meson are calculated. We show that the higher twist contributions are strongly suppressed in the low-$x$ kinematical regime. Possible enhancement of the higher twists effects for nuclei targets is discussed.

hep-ph