PPC 2026

Session

Neutrino Physics

31 Aug 2026, 14:00

72. First results of the LEGEND experiment in the quest for Neutrinoless Double-Beta Decay

Raoul Cesarano (Gran Sasso Science Institute (GSSI))

31/08/2026, 14:00

Neutrino physics

The search for neutrinoless double beta (0$\nu\beta\beta$) decay is considered as the most promising way to prove the Majorana nature of neutrinos as well as to give an indication on the mass hierarchy and on the absolute mass scale. The discovery of 0$\nu\beta\beta$ decay would moreover open the way for theories predicting the observed matter anti-matter asymmetry of the universe being a...

4. OPOSSUM: Event Topology Discrimination in TeO₂ Cryogenic Calorimeters

Andrei Puiu (INFN - Laboratori Nazionali del Gran Sasso)

31/08/2026, 14:25

Neutrino physics

In this contribution we would like to present the progress of OPOSSUM. OPOSSUM aims to discriminate Single Site Events from Multi Site Events in mK calorimeters for rare-event searches. The OPOSSUM project, funded by an ERC Starting Grant in 2024, aims to improve by an order of magnitude the sensitivity of neutrinoless double-beta decay (0νββ) experiments,a key process which would redefine our...

50. Implications of solar neutrino CEvNS in dark matter experiments

Valentina De Romeri (IFIC CSIC/UV (Valencia, Spain))

31/08/2026, 14:50

Neutrino physics

The recent observation of coherent elastic neutrino–nucleus scattering (CEvNS) from solar $^8$B neutrinos in dark matter direct detection experiments marks the beginning of the so-called neutrino fog era and further establishes these detectors as powerful low-energy neutrino observatories. Recent results from XENONnT, PandaX-4T, and LUX-ZEPLIN open new opportunities to test Standard Model...

94. Neutrino–Nucleus Neutral Current Scattering in Next Generation Experiments

Jayden Newstead (University of Melbourne)

31/08/2026, 15:15

Neutrino physics

A new generation of detectors—DUNE, Hyper-Kamiokande, and JUNO—will record unprecedented samples of solar, supernova, and reactor neutrinos, transforming the field into a precision science. Fully exploiting this data demands matching advances in theory, since the interpretation of low-energy neutrino signals hinges on neutrino–nucleus cross sections that presently carry large, often...

52. The Dark Connections of Neutrinos

Shreyashi Chakdar

01/09/2026, 14:00

Neutrino physics

We propose a class of dark matter models based on a chiral $U(1)$ gauge symmetry acting on a dark sector. The chiral $U(1)$ protects the masses of the dark sector fermions, and also guarantees the stability of the dark matter particle by virtue of an unbroken discrete N gauge symmetry. We identify 38 such $U(1)$ models which are descendants of a chiral $SU(3)×SU(2)$ gauge symmetry, consisting...

59. Emergent Large Lepton Mixing from Neutrino Refraction in Dark Matter

Manibrata Sen

01/09/2026, 14:25

Neutrino physics

In this talk, I will discuss a novel origin for the disparity between quark and lepton flavour mixing based on the refractive nature of neutrino masses. We postulate that the fundamental mixing in both the quark and lepton sectors is CKM-like, together with tiny vacuum neutrino masses, while the observed PMNS mixing matrix emerges dynamically from coherent forward scattering of neutrinos on an...

3. RES-NOVA a Supernovae Neutrino Observatory

Andrei Puiu (INFN - Laboratori Nazionali del Gran Sasso)

01/09/2026, 14:50

Neutrino physics

The RES-NOVA project hunts neutrinos from the cosmos (e.g. Sun, Supernovae) via coherent elastic neutrino-nucleus scattering (CEνNS) using an array of archaeological lead (Pb) based cryogenic detectors. The high CEνNS cross-section on Pb and the ultra-high radiopurity of archaeological Pb enable the operation of a highly sensitive neutrino observatory, equally sensitive to all neutrino...

66. Prospects for relic neutrino detection using nuclear spin experiments

Yeray Garcia Del Castillo

01/09/2026, 15:15

Neutrino physics

Direct detection of the cosmic neutrino background (CνB) provides a unique window into the early Universe but remains experimentally challenging. I will present a study of CνB-induced coherent transitions in polarised nuclear spin samples, described within an open quantum system framework that includes realistic experimental effects such as dephasing and imperfect polarisation. Using an...

36. Measuring the CP-Violating Phase with Atmospheric Neutrinos

Prof. Nicole Bell (The University of Melbourne)

03/09/2026, 14:00

1

Neutrino physics

We propose a new approach to measuring the CP-violating phase in neutrino mixing using atmospheric neutrinos. We develop an up-down flux ratio for sub-GeV atmospheric neutrinos that incorporates realistic detection effects and reduces systematic uncertainties. For the example of Hyper-Kamiokande --- the first experiment with sufficient atmospheric-neutrino statistics in this energy range ---...

24. Potential of JUNO and primary cosmic ray

Mr Zhimin Wang (Institute of high energy physics, CAS)

03/09/2026, 14:25

Neutrino physics

The Jiangmen Underground Neutrino Observatory (JUNO) experiment is a multi-purpose neutrino experiment with a rock overburden of 700 m, located at south China. The main JUNO detector consists of a 20-kton liquid scintillator central detector (CD) with ~78% photomultiplier coverage and 3% at 1 MeV energy resolution, surrounded by a 30-kton water pool that serves as a muon veto system and...

65. The relevance of precise effective field theory calculation for the new generation of neutrino experiments.

James Vandeleur (University of New South Wales (UNSW))

03/09/2026, 14:50

Neutrino physics

Radiative neutrino mass models naturally explain the smallness of neutrino masses via loop suppression. The framework in which we study the phenomenology of these models is effective field theory. Within this framework, a proper treatment accounts for both matching conditions between the new high- and low- energy theories, as well as running effects within the low energy theory. We analyse the...

57. The usual suspect: has a heavy dark matter particle decayed to KM3-230213A?

Sara Rebecca Gozzini

03/09/2026, 15:15

Neutrino physics

KM3NeT has recorded the transit of the highest-energy neutrino ever observed (KM3-230213A) whose provenience remains at the current time unknown. No astrophysical emitters were identified with a conclusive space correlation to the event, while cosmogenic interpretations require parameters ranges stretched to debated regions of the model. Alternatively to an astrophysical acceleration process,...