Search for Ultra-High-Energy Neutrinos at the Pierre Auger Observatory: New Triggers, Methods, and Constraints
The Pierre Auger Observatory has the capability to identify neutrino-induced extensive air showers above $10^{17}$ eV by using its large Surface Detector (SD) array. Data from the Observatory have been used to set some of the most stringent upper limits to the neutrino flux in the ultra-high energy (UHE) range. The data have also been used for follow-up detection of transient events in the context of multi-messenger astrophysics. In mid-2013, two additional SD triggers (Time-over-Threshold-deconvolved (ToTd) and Multiplicity-of-Positive Steps (MoPS)) were shown to increase the detection capability for the neutrino-induced air showers in the energy regime below $10^{19}$ eV by a factor of 5-10. This contribution will give an overview of the ongoing work regarding the searches for UHE neutrinos at the Pierre Auger Observatory. The impact of the ToTd and MoPS triggers for neutrino search in the zenith angle range of $60^{\circ} < \theta < 75^{\circ}$ is discussed. A novel neutrino identification method, which integrates these triggers, is applied to observational data to look for neutrino-like events using a \textit{blind} search strategy. New constraints to point-like sources of UHE neutrinos will be presented for the angular range explored.
Authors
- Belén Andrada
- Pedro J. Costa (ORCID: https://orcid.org/0000-0002-7476-7875)
- Zbigniew Szadkowski (ORCID: https://orcid.org/0000-0002-2690-9912)
- Bruno L. Lago (ORCID: https://orcid.org/0000-0001-9672-0499)
- Carla Taricco (ORCID: https://orcid.org/0000-0002-0129-5539)
- Giovanni Consolati (ORCID: https://orcid.org/0000-0003-3614-245X)
- Juan Manuel Gonzalez (ORCID: https://orcid.org/0000-0001-9193-0921)
- S. Petrera (ORCID: https://orcid.org/0000-0002-6029-1255)
- Varada Varma Kizakke Covilakam (ORCID: https://orcid.org/0000-0001-5278-3172)
- T. Pierog (ORCID: https://orcid.org/0000-0002-7472-8710)
- G. Sigl (ORCID: https://orcid.org/0000-0002-4396-645X)
- Mateo Fernandez
- T. Huege (ORCID: https://orcid.org/0000-0002-2783-4772)
- Marta Bianciotto (ORCID: https://orcid.org/0000-0002-9599-3214)
- Nicolas Leal
- Carmina Pérez Bertolli (ORCID: https://orcid.org/0000-0002-9790-5732)
- Carlo Salvattore Cruz Sanchez (ORCID: https://orcid.org/0009-0002-6173-0974)
- Frank Schröder (ORCID: https://orcid.org/0000-0001-8495-7210)
- A. Bueno (ORCID: https://orcid.org/0000-0002-7439-4247)
- Gustavo Medina‐Tanco (ORCID: https://orcid.org/0000-0002-3202-319X)
- A. C. Fauth (ORCID: https://orcid.org/0000-0001-7239-0288)
- Enrico Arnone (ORCID: https://orcid.org/0000-0001-6740-5051)
- Enrique Varela (ORCID: https://orcid.org/0000-0003-0715-7513)
- O. Schölten (ORCID: https://orcid.org/0000-0003-3649-1254)
- Olena Tkachenko (ORCID: https://orcid.org/0000-0001-6393-7851)
- Lorenzo Cazon (ORCID: https://orcid.org/0000-0001-6748-8395)
- B. R. Dawson (ORCID: https://orcid.org/0000-0002-4271-3055)
- Matteo Conte (ORCID: https://orcid.org/0000-0002-9932-224X)
- A. Haungs (ORCID: https://orcid.org/0000-0002-9638-7574)
- Dalibor Nosek (ORCID: https://orcid.org/0000-0001-6219-200X)
- G. Parente (ORCID: https://orcid.org/0000-0003-2847-0461)
- Paula Gina Isar (ORCID: https://orcid.org/0000-0002-1241-584X)
- Laura Valore (ORCID: https://orcid.org/0000-0003-2682-8378)
- Janning Meinert (ORCID: https://orcid.org/0000-0001-7582-3456)
- Emanuele De Vito (ORCID: https://orcid.org/0000-0003-2045-7588)
- Dušan Mandát (ORCID: https://orcid.org/0000-0001-7748-7468)
- M. Roth (ORCID: https://orcid.org/0000-0003-1281-4477)
- Adila Abdul Halim (ORCID: https://orcid.org/0000-0003-1218-1737)
- Gonzalo Rodriguez Fernandez (ORCID: https://orcid.org/0000-0002-4683-230X)
- Jiří Blažek (ORCID: https://orcid.org/0000-0002-5870-8947)
- Therese Paulsen
- Adriel Bartz Mocellin
- Berenika Čermáková
- S. J. de Jong (ORCID: https://orcid.org/0000-0002-3120-3367)
- Armando di Matteo (ORCID: https://orcid.org/0000-0002-8260-1867)
- Alexey Yushkov (ORCID: https://orcid.org/0000-0001-5107-9116)
- K. Daumiller (ORCID: https://orcid.org/0000-0002-0527-4823)
- A. Insolia (ORCID: https://orcid.org/0000-0002-9040-1566)
- Lorenzo Caccianiga (ORCID: https://orcid.org/0000-0002-2245-5108)
- Darko Veberič (ORCID: https://orcid.org/0000-0003-2683-1526)
- María Isabel Micheletti (ORCID: https://orcid.org/0000-0002-1063-9938)
- A. Segreto (ORCID: https://orcid.org/0000-0001-7341-6603)
- L. Nellen (ORCID: https://orcid.org/0000-0003-1059-8731)
- Felicia Barbato (ORCID: https://orcid.org/0000-0003-0751-6731)
- Jan Pękala
- Alexandra Ramos Fernandes (ORCID: https://orcid.org/0000-0003-2054-4438)
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- R. Caruso (ORCID: https://orcid.org/0000-0003-1622-8731)
- I. Allekotte (ORCID: https://orcid.org/0000-0002-9624-3044)
- F. Sarazin (ORCID: https://orcid.org/0000-0001-5614-1986)
- Luis A. Núñez
- Chaitanya Priyadarshi (ORCID: https://orcid.org/0000-0002-9160-9617)
- M. Cristinziani (ORCID: https://orcid.org/0000-0003-3893-9171)
- E. Zas (ORCID: https://orcid.org/0000-0002-4430-8117)
- Clara Keiko Oliveira Watanabe
- Roberta Colalillo (ORCID: https://orcid.org/0000-0002-4179-9352)
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- L. Miramonti (ORCID: https://orcid.org/0000-0002-2808-5363)
- F. Simon (ORCID: https://orcid.org/0000-0002-5978-0289)
- F. Salamida (ORCID: https://orcid.org/0000-0002-9306-8447)
- P. Trávnı́ček (ORCID: https://orcid.org/0000-0002-1655-9584)
- Benjamin Flaggs (ORCID: https://orcid.org/0000-0002-5549-1869)
- P. Hamal (ORCID: https://orcid.org/0000-0003-3139-7234)
- A. D. Supanitsky (ORCID: https://orcid.org/0000-0002-6942-6216)
- Maximilian Straub
- R. Mussa (ORCID: https://orcid.org/0000-0002-0294-9071)
- Camilla Petrucci
- Steffen Hahn (ORCID: https://orcid.org/0000-0001-5040-3666)
- Federico Maria Mariani
- Fiona H. Ellwanger
- J. Vícha (ORCID: https://orcid.org/0000-0002-7945-3605)
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- Antoine Letessier-Selvon
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- S. Buitink (ORCID: https://orcid.org/0000-0002-6177-497X)
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- Rukije Uzeiroska
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- Nicolas San Martin
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- Mohit Saharan
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- J. A. Chinellato (ORCID: https://orcid.org/0000-0002-1236-0789)
- S. Andringa (ORCID: https://orcid.org/0000-0002-6397-9207)
- Jorge Caraça-Valente
- Agustín Cobos Cerutti
- David Schmidt (ORCID: https://orcid.org/0000-0003-2005-4244)
- Krzysztof Pytel (ORCID: https://orcid.org/0000-0002-2937-7886)
- Adriana Vásquez-Ramírez (ORCID: https://orcid.org/0000-0001-7499-9302)
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- C. Bonifazi (ORCID: https://orcid.org/0000-0002-3087-3609)
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- Peter Mazur
- Edyvânia Emily Pereira Martins (ORCID: https://orcid.org/0000-0002-1167-8314)
- Fridtjof Feldbusch
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- Patricia María Hansen
- A. Gorgi (ORCID: https://orcid.org/0000-0002-8085-2304)
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- V. de Souza (ORCID: https://orcid.org/0000-0003-0865-233X)
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- Luan Bonneau Arbeletche (ORCID: https://orcid.org/0000-0003-4544-9808)
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- Milton Freitas
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- Ralph Engel
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- Juan Pallotta
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- Humberto Ibarguen Salazar
- Rita Cassia dos Anjos
- Germano Guedes
- Analisa Mariazzi
- Norbert Kunka
- Ezequiel Rodriguez
- Luca Deval
- Marvin Gottowik
- Stanislav Michal
- Johannes Blümer
- Jelena Köhler
- Eva Santos
- Danilo Zavrtanik
- Fernando Gollan
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- Lukáš Vaclavek
- Isabelle Lhenry-Yvon
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- Paul Filip
- A. Filipčič (ORCID: https://orcid.org/0000-0001-5671-1555)
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- Josina Schulte
- Toshihiro Fujii
- Thomas Fitoussi
- Carmelo Evoli
- Harm Schoorlemmer
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- Felix Riehn
- Margita Kubátová
- Melanie Weitz (ORCID: https://orcid.org/0009-0001-9010-9610)
- Primo F. Gómez Vitale
- Rogerio M. de Almeida
- Martina Boháčová
- Niklas Langner
- R. Sarmento (ORCID: https://orcid.org/0000-0002-5018-5467)
- Pavel Horváth (ORCID: https://orcid.org/0000-0002-6710-5339)
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- Ioana Codrina Maris
- Giorgio Matthiae
- Michael Prouza
- Marcos Cerda
- Vincenzo Rizi
- Valerio Verzi
- Michael Schimp
- Mário Pimenta
- Piera Luisa Ghia
- P. Gabriel Brichetto Orchera
- Gaetano Salina
- Ruben Squartini
- Gabriela Nicora
- Achille Nucita
- Manuel Platino
- Antonella Castellina
- Corbin Covault
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- Brian Fick
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- Marko Zavrtanik
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- Jeffrey Brack
- Marina Scornavacche
- Alexander Menshikov
- C. Dobrigkeit
- Jörg Hörandel
- Juan Carlos Arteaga Velázquez
- Indira D. Vergara Quispe
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- Paul Sommers
- Cainã Oliveira
- Max Büsken
- Luis A. Anchordoqui (ORCID: https://orcid.org/0000-0003-1463-7136)
- Gualberto Avila
- A. Săftoiu (ORCID: https://orcid.org/0000-0002-7903-6510)
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- Rodrigo Pelayo
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- Baobiao Yue
- Paolo Privitera
- Lorenzo Apollonio (ORCID: https://orcid.org/0009-0008-5625-5893)
- Carla Aramo
- Srijan Sehgal
- Joao dos Anjos
- Roberto Aloisio
- Mario E. Bertaina
- Diego Melo
- Pierpaolo Savina
- Vlastimil Jílek (ORCID: https://orcid.org/0000-0001-5774-7285)
- Matías Rolf Hampel
- Veronika Vašíčková
- Ugo GIACCARI
- J. Rautenberg
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- Sara Martinelli
- Heino Falcke
- Geraldina Golup
- Diego Ravignani
- Jaime de Oliveira
- Petr Schovanek
- Libor Nožka
- Jannis Pawlowsky
- Olivier Deligny
- Danelise de Oliveira Franco
- Juan Manuel Figueira
- Federico Campuzano
- Frederik Krieger
- Sven Querchfeld
- Karl-Heinz Kampert
- Matthias Kleifges
- Samo Stanič
- Alex Tapia
- Gabriella Cataldi
- Luciana Andrade Dourado
- Tomáš Fodran (ORCID: https://orcid.org/0009-0000-9529-0853)
- Matias Jorge Tueros (ORCID: https://orcid.org/0000-0003-1570-1419)
- Megha Mogarkar
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- Eric-Teunis de Boone
- Mohamed Ismaiel
- Karolina Syrokvas
- Matteo Tambone
- Pim van Dillen
Publication Details
- Published
- 2025-09-24
- DOI
- https://doi.org/10.22323/1.501.1170
- Primary Topic
- Astrophysics and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Strong
- Ministerul Cercetării, Inovării şi Digitalizării
- European Commission
- Deutsche Forschungsgemeinschaft
- Agence Nationale de la Recherche
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Ministerstvo Školství, Mládeže a Tělovýchovy
- Grantová Agentura České Republiky
- Bundesministerium für Bildung und Forschung
- Fonds De La Recherche Scientifique - FNRS
- Consejo Nacional de Investigaciones Científicas y Técnicas
- Fonds Wetenschappelijk Onderzoek
- Consejo Nacional de Ciencia y Tecnología
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- Centre National de la Recherche Scientifique
- Financiadora de Estudos e Projetos
- Istituto Nazionale di Astrofisica
- Universidad Nacional Autónoma de México
- Ministério da Ciência, Tecnologia, Inovações e Comunicações
- Vlaamse regering
- Istituto Nazionale di Fisica Nucleare
- Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen
- Helmholtz Alliance for Astroparticle Physics
- Ministero dell'Università e della Ricerca
- Fundação para a Ciência e a Tecnologia
- Agencia Nacional de Promoción Científica y Tecnológica
- Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México
- Institut National de Physique Nucléaire et de Physique des Particules