Antonio MarroneTheoretical Physics · Bari

Neutrino Phenomenology

Antonio Marrone

Full Professor of Theoretical Physics

Università degli Studi di Bari “Aldo Moro” · INFN Sezione di Bari

Research → Publications

Latest

Research statement

Neutrino phenomenology and the flavour puzzle

My research lies at the interface between neutrino physics, particle phenomenology and cosmology. With the Bari group I have contributed to a long line of global analyses of neutrino oscillation data, combining solar, atmospheric, reactor and accelerator experiments to determine the parameters of leptonic mixing with state-of-the-art precision.

As measurements enter the subpercent regime, these results constrain the neutrino mass ordering, leptonic CP violation and the absolute mass scale, and probe possible signatures of physics beyond the three-neutrino paradigm. A complementary line of work investigates modular invariance as a candidate symmetry underlying the flavour structure of quarks and leptons.

Full research statement → Analysis results global-nu.org
The upper half-plane with the shaded fundamental domain of the modular group SL(2,Z), bounded by the unit circle and the lines Re(tau) = ±1/2, with the fixed points i, omega and −omega-bar marked.
The complex modulus τ lives in the shaded fundamental domain of SL(2,ℤ). In the modular-invariant approach, Yukawa couplings are modular forms of τ; the fixed points i, ω, −ω̄ and i∞ carry residual symmetries.

Featured · interactive figure

What does a neutrino look like in a water-Cherenkov detector?

The neutrino itself is invisible: the ring of light comes from the charged lepton it produces.

Open the figure → All interactive figures

Oscillation parameters

Best-fit values and 3σ ranges from the global analysis of March 2025: Capozzi, Giarè, Lisi, Marrone, Melchiorri and Palazzo, Phys. Rev. D 111, 093006 (2025). The November 2025 update with the first JUNO results revises δm² and sin²θ₁₂.

Solar mixing angle
0.303 3σ: 0.264 – 0.345
sin²θ₁₂ · 4.5 % precision (1σ)
Reactor mixing angle
0.0223 3σ: 0.0206 – 0.0238
sin²θ₁₃ · 2.4 % precision (1σ)
Atmospheric mixing angle
0.473 3σ: 0.437 – 0.581
sin²θ₂₃ · first octant at 1.1σ, ambiguity persists
Solar splitting
7.37 ×10⁻⁵ eV²
δm² · 2.3 % precision (1σ)
Atmospheric splitting
2.495 ×10⁻³ eV²
|Δm²| · 0.8 % — the first 3ν parameter below 1 %
Leptonic CP phase
1.20 3σ: 0.73 – 2.03
δ/π · CP violation favoured at 1.3σ, still open
All analysis results →

Ci fu una grande battaglia di idee: alla fine non rimasero né vinti, né vincitori, né idee

Stefano Benni

L’ultimo che lascia la Terra spenga il Sole

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Photography

A selection of my own photographs, shown uncropped.

Two people passing a statue in a walled garden, in black and white.
Under the pines
Matera at night, the lit town climbing the hillside under a black sky.
Matera by night
A chevron road sign and a leaning utility pole in open countryside, in black and white.
Bend ahead
An avenue of cypresses beside a modern white colonnade, in black and white.
Cypresses
The Sassi of Matera: tufa houses carved into the rock face, in black and white.
Sassi di Matera
A road sign silhouetted against a heavy sky at dusk, in black and white.
Dusk

Contact

Students, collaborators and prospective thesis candidates are welcome to write to either institutional address.

Address

Dipartimento Interateneo di Fisica
Università degli Studi di Bari & INFN Bari
Via Amendola 173 — 70126 Bari, Italy

Email

antonio.marrone@ba.infn.it
antonio.marrone@uniba.it

Phone

+39 080 544 3463