Neutrino Oscillation Workshop

NOW 2024 is the 12th edition of a biannual workshop series started in 1998 in Amsterdam and held since 2000 in the Apulian (Puglia) region of Italy. The editions 2000-2016 took place in Otranto (Lecce) and the editions 2018-2022 in Rosa Marina (Ostuni, Brindisi).   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.

The structure of the NOW 2024 Workshop will include four plenary and parallel sessions:
• Session I – Standard three-neutrino oscillations 
• Session II – Beyond the standard framework 
• Session III – Neutrino masses, states and interactions
• Session IV – Particle physics from the sky and the cosmos :
• Session – Crossing the portal  (only plenary)

The workshop will be held from September 2 (arrivals) to September 8 (departures) at the Basiliani Hotel in Otranto, at walking distance (~25’) from the old town of Otranto and from its local beach. Because of limitations in accommodation and to fulfill the workshop requirements, participation is by invitation, and is limited to about 115 participants.

The Proceedings of NOW 2000, 2004, 2006, 2008, 2010, 2012 and 2014 have been published in Nucl Phys. B (Proc. Suppl.) Vol. 100, 145, 168, 188, 217, 237-238, and 265-266, respectively. The Proceedings of NOW 2016, 2018 and 2022 have been published in PoS (pos.sissa.it/283  /337 and /421 , respectively).

NOW 2022 is the 11th workshop of a series started in 1998 in Amsterdam. In the years 2000-2016, this international workshop took place in Otranto (Lecce, Italy). This edition, as in 2018, will take place in Rosa Marina (Ostuni, Brindisi, Italy). NOW is locally organized by the INFN sections and Depts. of Physics of Bari and Lecce, ​and is one of the major conference series recognized by INSPIRES in the field of neutrino physics. The aim of the workshop is: to discuss Neutrino Oscillation Physics, in particular current experimental data and their theoretical interpretation; to outline future investigations of neutrino masses and mixings; and to explore the links with various research fields in Astroparticle Physics and Cosmology. The structure of the Workshop includes five sessions, with plenary and parallel talks on several topics of current interest. 
The sessions for the NOW 2022 edition are: 
• Session I - Oscillation parameters: present
• Session II - Oscillation parameters: future
• Session III - Multimessenger astrophysics
• Session IV - Neutrino masses, states and interactions
• Session V - Particle physics in the Cosmos

The Neutrino Oscillation Workshop NOW 2022 was held in Rosa Marina (Ostuni, Brindisi, Italy) from September 4th to September 11th, 2022. 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 PRIN project 2017W4HA7S “NAT-NET: Neutrino and Astroparticle Theory Network”.

NOW 2022 is the eleventh 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, also the latest Workshop (NOW 2022). Further information about NOW 2022 and the whole Workshop series can be found at the website https://www.ba.infn.it/now  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 five sessions: (1) Oscillation parameters: present; (2) Oscillations parameters: future; (3) Multi-messenger astrophysics; (4) Neutrinos masses, states and interactions; (5) Particle physics in the cosmos. In the NOW 2022 poster theme, these sessions are shown as flags fluttering from the masts and the bowsprit of a large vessel with the wind in its sails. The vessel represents the NOW ​Workshop series, that has taken place since the year 2000 along the Apulian coasts (from Otranto to Ostuni), and has witnessed many fascinating journeys across neutrino and astroparticle physics. The lands barely visible on the horizon, and an undefined direction of the compass rose, remind us that new physics awaits discovery in these fields. 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 2022.  
We would like to thank all the participants, a total of about 126 physicists coming from 19 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 Secretariat, formed by Daniela Dell’Anna (Lecce) and Antonio Silvestri (Bari), to the assistance of the INFN administrative managers Francesca Assisi (Bari) and Carla Gentile (Lecce), to the precious help of the System Manager Enrico Fasanelli and of the Technical Assistants Antonio Forte and Fulvio Ricciardi (Lecce). Warm thanks are also due to the PhD students Giuseppe Lucente and Francesco Sivo for their enthusiastic collaboration in the local organization, and to all the people who provided the workshop services. The organizers are also grateful to the official NOW 2022 Agency “I Viaggi di Salomone” (Bari, Italy) for providing 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
S. Katsanevas EGO and CNRS
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)

The Neutrino Oscillation Workshop NOW 2018 was held in Rosa Marina (Ostuni, Brindisi, Italy) from September 9th to September 16th, 2018. 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, with the financial support of the Italian Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR), of the INFN, and of the Universities of Bari and Salento. For the NOW 2018 Workshop Proceedings presented hereafter, we acknowledge partial support from MIUR through the Project of Relevant National Interest n. 2017W4HA7S (PRIN) NAT-NET: Neutrino and Astroparticle Theory Network.

NOW 2018 is the tenth of a series of Workshops, the first of which (NOW 1998) was held at NIKHEF (Amsterdam) in 1998. The second to ninth workshops (NOW 2000, 2004, 2006, 2008, 2010, 2012, 2014, 2016) took place in Otranto (Lecce, Italy). For the 2018 meeting, we selected the "Ostuni Rosa Marina Resort" location in Rosa Marina (Ostuni, Italy). Further information about NOW 2018 and its previous editions can be found at the website http://www.ba.infn.it/now . NOW remains among the few, well established “Major Conference Series” in high-energy physics, which have been selected on the SPIRES-HEP conference database: http://inspirehep.net/info/Conferences/series .

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. The NOW 2016 Proceedings appeared as electronic version in Proceedings of Science (SISSA, Italy), available at: https://pos.sissa.it/283/ .

The structure of the NOW Workshop includes five sessions: (1) Oscillation parameters: present; (2) Oscillations parameters: future; (3) Multi-messenger astrophysics; (4) Neutrinos masses, states and interactions; (5) Particle physics in the cosmos. In the NOW 2018 poster theme, these sessions are associated to sectors of a ν Compass Rose on a hand-drawn nautical map, with the inland town being an impression of Ostuni. In each Session, one morning plenary session and two afternoon parallel sessions were dedicated to the discussion of recent results and new developments and ideas. 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) in 2018.

We would like to thank all the participants, a total of about 130 physicists coming from 22 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 Administration Manager Loredana Napolitano (Bari) and of the Secretariat, formed by Daniela Dell’Anna (Lecce), Maria Concetta Gerardi (Lecce), and Antonio Silvestri (Bari), to the commitment and driving expertise of Frosino Spagna (Lecce), to the precious help of the System Manager Enrico Fasanelli and of the Technical Assistants Fulvio Ricciardi and Pierluigi Santo (Lecce). Warm thanks are also due to the PhD students Antonio De Benedittis and Margherita Di Santo for their enthusiastic collaboration in the organization.
 
We conclude with the hope that the eleventh workshop of the NOW series will take place in Rosa Marina in September 2020.

NOW 2016 is the 9th workshop of a series started in 1998 in Amsterdam. Since the year 2000, this international workshop takes place in Otranto (Lecce, Italy). NOW is locally organized by the INFN sections and Depts. of Physics of Bari and Lecce, and is one of the few "Major Conference Series" recognized by INSPIRES in the field of neutrino physics, https://inspirehep.net/info/Conferences/series

The aim of the workshop is: to discuss Neutrino Oscillation Physics, in particular current experimental data and their theoretical interpretation; to outline future investigations of neutrino masses and mixings; and to explore the links with various research fields in Astroparticle Physics and Cosmology.

The structure of the Workshop includes five sessions, with plenary and parallel talks on several topics of current interest. The sessions for the NOW 2016 edition are:

• Session I - Oscillation parameters: present
• Session II - Oscillation parameters: future
• Session III - Multimessenger astrophysics
• Session IV - Neutrino masses, states and interactions
• Session V - Particle physics in the Cosmos

The NOW 2016 Proceedings have been edited by Antonio Marrone (U. of Bari and INFN, Bari), Alessandro Mirizzi (U. of Bari and INFN, Bari), and Daniele Montanino (U. of Salento and INFN, Lecce). For further information see the NOW website, http://www.ba.infn.it/now

Foreword

Committees and sponsors