Luca Di Luzio

$S U (N)$ baryon formation in the early Universe and dark matter

Luca Di Luzio, Samuele Di Valeriano, Enrico Nardi

We study the formation of $N$ -quark baryons during the confinement crossover of an $S U (N)$ gauge theory containing quarks in the fundamental representation, wit…

A Casimir bottleneck in primordial large-N baryon formation

Luca Di Luzio, Samuele Di Valeriano, Enrico Nardi

We study baryon $(B)$ formation in the early Universe in a confining $S U (N)$ gauge theory with quarks transforming in the fundamental representation. Casimir sc…

Reconciling axion quality with post-inflation cosmology

Luca Di Luzio, Samuele Di Valeriano, Marco Nardecchia +1

We address the axion quality/cosmology tension that often plagues QCD axion models in post-inflationary Peccei-Quinn (PQ) breaking scenarios. In the proposed framework, the PQ symm…

Searching for Axions on a Higher Note: Third-Harmonic Generation from Colliding High-Intensity Laser Beams

Ashis Paul, Leone di Mauro Villari, Davide Tedeschi +3

We propose a new laboratory strategy to generate and detect axion-like particles via third-harmonic generation induced by two non-collinear, polarised high-intensity laser beams of…

How invisible can QCD axions be? From Supernova emission to Cherenkov signals

Luca Di Luzio, Vincenzo Fiorentino, Maurizio Giannotti +2

We investigate the scenario of maximally invisible axions, namely QCD axions whose interactions with matter arise exclusively from the irreducible coupling to gluons responsible fo…

hep-ph2026★ 1 cited

Axions at the meV Crossroads: Theory, Cosmology, Astrophysics, and Experiments

Michele Cicoli, Francesco D'Eramo, Luca Di Luzio +18

The meV mass range has emerged as a focal point in axion physics, where advances in theory, cosmology, astrophysics, and experimental techniques converge. Axions in this mass range…

A framework for missing-energy searches with anomalous light vectors

Luca Di Luzio, Marco Nardecchia, Stefano Scacco +1

We study light spin-1 gauge bosons coupled to electroweak-anomalous currents. For generic charge assignments, anomaly cancellation requires new fermions (anomalons) that are chiral…

hep-ex2026

RadioAxion results on the search for axion dark matter under Gran Sasso

Carlo Broggini, Giuseppe Di Carlo, Luca Di Luzio +2

We report first results from RadioAxion, an underground experiment searching for axion dark matter through periodic modulations of radioisotope decays. We monitor the $α$ decay of…

The Too Visible QCD Axion

Luca Di Luzio, Michele Redi, Alessandro Strumia +2

Murayama proposed a GeV-scale axion theory where the up-quark mass term is generated dynamically by the QCD chiral condensate, spontaneously breaking a Peccei-Quinn symmetry. It pr…

Axion production via trapped misalignment from Peccei-Quinn symmetry breaking

Luca Di Luzio, Philip Sørensen

The Peccei-Quinn (PQ) symmetry does not need to be exact, and even a tiny source of PQ breaking not aligned with the QCD anomaly might have significant phenomenological implication…

hep-ph2024★ 19 cited

Model Independent Tests of the Hadronic Vacuum Polarization Contribution to the Muon $g$ $-$ $2$

Luca Di Luzio, Alexander Keshavarzi, Antonio Masiero +1

The hadronic vacuum polarization (HVP) contributions to the muon $g$ $-$ $2$ are the crucial quantity to resolve whether new physics is present or not in the comparison between the S…

hep-ph2024★ 2 cited

Axion Window on New Macroscopic Forces

Luca Di Luzio, Hector Gisbert, Fabrizio Nesti +1

Axion-mediated forces are enhanced by the presence of CP-violating axion couplings, which are however tightly constrained by electric dipole moment (EDM) searches. We discuss the u…

Alpha radioactivity deep-underground as a probe of axion dark matter

Carlo Broggini, Giuseppe Di Carlo, Luca Di Luzio +1

We propose to investigate the time modulation of radioisotope decays deep underground as a method to explore axion dark matter. In this work, we focus on the $α$ -decay of heavy iso…

Radiative Quarkonium decays into an Invisible ALP

Luca Di Luzio, Alfredo Walter Mario Guerrera, Xavier Ponce Díaz +1

In this talk the ALP production from radiative quarkonium decays is presented. To this purpose, the relevant cross-section is computed from a $d = 5$ effective Lagrangian containing…

Axion-Like Particles in Radiative Quarkonia Decays

Luca Di Luzio, Alfredo Walter Mario Guerrera, Xavier Ponce Díaz +1

Radiative quarkonia decays offer an ideal setting for probing Axion-Like Particle (ALP) interactions. This paper provides a comprehensive review of ALP production mechanisms throug…

CP-Violating Axions: A Theory Review

Luca Di Luzio, Hector Gisbert, Gabriele Levati +2

We review the physics case for CP-violating axions. In the first part, we focus on the Quantum Chromodynamics (QCD) axion and argue that new sources of CP violation beyond QCD misa…

hep-ph2023★ 10 cited

Closing in on new chiral leptons at the LHC

Daniele Barducci, Luca Di Luzio, Marco Nardecchia +1

We study the phenomenological viability of chiral extensions of the Standard Model, with new chiral fermions acquiring their mass through interactions with a single Higgs. We exami…

hep-ph2023★ 21 cited

The Chiral Lagrangian of CP-Violating Axion-Like Particles

Luca Di Luzio, Gabriele Levati, Paride Paradisi

We discuss the construction of the most general CP-violating chiral Lagrangian for an axion-like particle (ALP). Starting with an effective Lagrangian containing light quarks and g…

Low-energy flavour probes of light vector bosons

Luca Di Luzio, Gabriele Levati, Paride Paradisi +1

In this work, we construct the chiral Lagrangian for a light spin-1 boson $X$ possessing both vectorial and axial couplings to the light Standard Model quarks $u, d, s$ . We then us…

Flavour constraints on light spin-1 bosons within a chiral Lagrangian approach

Luca Di Luzio, Gabriele Levati, Paride Paradisi +1

We discuss the construction of the chiral Lagrangian for a light spin-1 boson, here denoted as $X$ , featuring both vector and axial-vector couplings to light $u, d, s$ quarks. Focusi…

hep-ph2023★ 4 cited

On the oscillating electric dipole moment induced by axion-fermion couplings

Luca Di Luzio, Hector Gisbert, Philip Sørensen

It has been recently claimed that the axion coupling to fermions is responsible for an oscillating electric dipole moment (EDM) in the background of axion dark matter. In this work…