The Neutrino Oscillation Workshop NOW 2024 was held in Otranto (Lecce, Italy) from September 2th to September 8th, 2024. The meeting was organized by the Departments of Physics and by the Sections of the Istituto Nazionale di Fisica Nucleare (INFN) of Bari and Lecce, and was financially supported by the INFN, by the Universities of Bari and of Salento, and by the Italian Ministero dell’Università e della Ricerca (MUR) through the project grant number 2022E2J4RK PANTHEON “Perspectives in Astroparticle and Neutrino THEory with Old and New messengers,” under the program PRIN 2022 (Mission 4, Component 1, CUP I53D23001110006) funded by MUR and by the Europ. Union – Next Generation EU.

NOW 2024 is the twelfth of a series of Workshops, the first of which (NOW 1998) was held at NIKHEF (Amsterdam) in 1998. The second to ninth editions (NOW 2000, 2004, 2006, 2008, 2010, 2012, 2014, 2016) took place in Otranto (Lecce, Italy). The Rosa Marina Resort in Ostuni (Brindisi, Italy) hosted the tenth edition (NOW 2018) and after the pandemic interruption in 2020, the eleventh edition (NOW 2022). Further information about NOW 2024 and the whole Workshop series can be found at the website https://home.ba.infn.it/~now/now2024/ The inspiring idea of the NOW series is to organize a specialized meeting three months after the International Neutrino Conference, in order to stimulate the exchange of opinions in a truly workshop-like atmosphere, with a few survey talks, short contributions, and ample time for discussion among the participants.

The Workshop is focused on one of the hottest topics of contemporary physics, i.e., Neutrino Oscillations, together with its connections with particle physics, cosmic ray physics, astrophysics, and cosmology. Indeed, a growing emphasis is being given to astroparticle physics and multimessenger astronomy in the Workshop. Starting from NOW 2000, it was decided to publish the Proceedings of this series; in particular, the NOW 2000, 2004, 2006, 2008, 2010, 2012 and 2014 Proceedings appeared in Nucl. Phys. B (Proc. Suppl.), in Vols. 100, 145, 168, 188, 217, 237-238, and 265-266 respectively. Starting from NOW 2016, the Proceedings appeared as electronic versions in PoS (Proceedings of Science, SISSA, Italy), available at: https://pos.sissa.it/cgi-bin/reader/family.cgi?code=now

The structure of the NOW Workshop includes four sessions both with plenary and parallel contributions: (1) Standard three-neutrino oscillations; (2) Beyond the standard framework; (3) Neutrino masses, states and interactions; (4) Particle Physics from the sky and the cosmos; and an extra plenary session named Crossing the Portal.

In the NOW 2024 poster theme, these sessions are shown down below four pillars at the sides of a portal (inspired by the portal of the Cathedral of Otranto). The pillars represent the state of the art of the current knowledge in Neutrino Physics while the door represents what we will learn from the future experiments and observation. These Proceedings can thus be considered as an up-to-date survey of the status and prospects of Neutrino Oscillation Physics (and of closely related fields in Astroparticle Physics) as of 2024.  

We would like to thank all the participants, a total of about 110 physicists coming from 15 different countries, and in particular the speakers and the conveners who, in collaboration with the members of the Organizing Committee, contributed with enthusiasm to the scientific success of the Workshop.

Special thanks go to all the people actively involved in the organization of the Workshop. The smooth running of the meeting was due to the invaluable work of the official NOW 2024 Agency “Intermeeting Sud Agency” (Bari, Italy), whose staff included Mary Lonigro (coordinator), Federica Giannattasio (secretariat) and Emilia Colaianni (collaborator). We are grateful to the INFN Administrative Managers Francesca Assisi (Bari) and Carla Gentile (Lecce) for assistance, and to the System Manager Enrico Fasanelli and the Technical Assistants Antonio Forte and Fulvio Ricciardi (Lecce) for their precious help. Warm thanks are also due to the PhD students Elisabetta Casilli and Alessandro Lella for their enthusiastic collaboration in the local organization, and to all the people who provided the workshop services. 

Organizing Committee
Paolo Bernardini (*), Lecce
Gabriella Catanesi, Bari
Giampaolo Co’, Lecce
Marilisa De Serio, Bari
Gianluigi Fogli (*), Bari
Eligio Lisi (*), Bari
Antonio Marrone, Bari
Gennaro Miele, Napoli
Alessandro Mirizzi, Bari
Daniele Montanino, Lecce
Antonio Palazzo, Bari
Saverio Simone, Bari
Antonio Surdo, Lecce

(*) Chairpersons
 

Scientific Advisory Committee
J. Beacom, CCAPP Columbus
N. Bell, Melbourne
J. Cao, IHEP Beijing
M. Chen, Queen’s U. Canada
J. Ellis, London
S. Goswami, Ahmedabad
S. Hannestad, Aahrus
D. Harris, FNAL and Toronto
T. Kajita, Tokyo
T. Lasserre, CEA France
M. Lindner, MPI Heidelberg
E. Resconi, TU Munich
Eun-Suk Seo,  U. Maryland
A.Yu. Smirnov,  MPI Heidelberg
Y. Suzuki, Tokyo
J.W.F. Valle, Valencia
E. Waxmann, Weizmann Inst.
 

Sponsors
Dipartimento Interateneo di Fisica “Michelangelo Merlin,” Bari
Dipartimento di Matematica e Fisica “Ennio de Giorgi,” Lecce
Università di Bari
Università del Salento
Istituto Nazionale di Fisica Nucleare (INFN)
Ministero dell’Università e della Ricerca (MUR)

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