| Title: |
A search for ultra-high-energy photons at the Pierre Auger Observatory exploiting air-shower universality |
| Authors: |
Pierre Auger Collaboration; Savina, Pierpaolo; Abreu, Pedro; Aglietta, Marco; Albury, Justin M.; Allekotte, Ingomar; Almela, Alejandro; Alvarez-Muniz, Jaime; Alves Batista, Rafael; Anastasi, Gioacchino Alex; Anchordoqui, Luis A.; Andrada, Belén; Andringa, Sofia; Aramo, Carla; Araújo Ferreira, Paulo Ricardo; Arteaga Velazquez, Juan Carlos; Asorey, Hernán Gonzalo; Assis, Pedro; Avila, Gualberto; Badescu, Alina Mihaela; Bakalova, Alena; Balaceanu, Alexandru; Barbato, Felicia; Barreira Luz, Ricardo Jorge; Becker, Karl-Heinz; Bellido, Jose A.; Berat, Corinne; Bertaina, Mario Edoardo; Bertou, Xavier; Biermann, Peter L.; Binet, Virginia; Bismark, Kathrin; Bister, Teresa; Biteau, Jonathan; Blazek, Jiri; Bleve, Carla; Bohacova, Martina; boncioli, denise; Bonifazi, Carla; Bonneau Arbeletche, Luan; Borodai, Nataliia; Botti, Ana Martina; Brack, Jeffrey; Bretz, Thomas; Brichetto Orchera, P. Gabriel; Briechle, Florian Lukas; Buchholz, Peter; Bueno, Antonio; Buitink, Stijn; Buscemi, Mario; Büsken, Max; Caballero-Mora, Karen S.; Caccianiga, Lorenzo; Canfora, Fabrizia; Caracas, Ioana; Carceller, Juan Miguel; Caruso, Rossella; Castellina, Antonella; Catalani, Fernando; Cataldi, Gabriella; Cazon, Lorenzo; Cerda, Marcos; Chinellato, Jose Augusto; Chudoba, Jiri; Chytka, Ladislav; Clay, Roger W.; Cobos Cerutti, Agustín; Colalillo, Roberta; Coleman, Alan; Coluccia, Maria Rita; Conceição, Rúben; Condorelli, Antonio; Consolati, Giovanni; Contreras, Fernando; Convenga, Fabio; Correia dos Santos, Diego; Covault, Corbin; Dasso, Sergio; Daumiller, Kai; Dawson, Bruce R.; Day, Jarryd A.; Almeida, Rogerio M. De; Jesús, Joaquín de; Jong, Sijbrand J. De; De Mauro, Giuseppe; Mello Neto, João De; Mitri, Ivan De; Oliveira, Jaime De; Oliveira Franco, Danelise de; Palma, Francesco De; Souza, Vitor de; Vito, Emanuele De; Río, Mariano del; Deligny, Olivier; Deval, Luca; Matteo, Armando Di; Dobrigkeit, Carola; D'Olivo, Juan Carlos; Domingues Mendes, Luis Miguel; Anjos, Rita dos; Santos, Diego dos; Dova, Maria Teresa; Ebr, Jan; Engel, Ralph; Epicoco, Italo; Erdmann, Martin; Escobar, Carlos O.; Etchegoyen, Alberto; Falcke, Heino; Farmer, John; Farrar, Glennys R.; Fauth, Anderson; Fazzini, Norberto; Feldbusch, Fridtjof; Fenu, Francesco; Fick, Brian; Figueira, Juan Manuel; Filipcic, Andrej; Fitoussi, Thomas; Fodran, Tomáš; Freire, Martín Miguel; Fujii, Toshihiro; Fuster, Alan; Galea, Cristina; Galelli, Claudio; García, Beatriz; García Vegas, Adrianna Luz; Gemmeke, Hartmut; Gesualdi, Flavia; Gherghel-Lascu, Alexandru; Ghia, Piera Luisa; Giaccari, Ugo; Giammarchi, Marco; Glombitza, Jonas; Gobbi, Fabian; Gollan, Fernando; Golup, Geraldina; Gómez Berisso, Mariano; Gómez Vitale, Primo F.; Gongora, Juan Pablo; González, Juan Manuel; Gonzalez, Nicolas Martin; Goos, Isabel; Gora, Dariusz; Gorgi, Alessio; Gottowik, Marvin; Grubb, Trent D.; Guarino, Fausto; Guedes, Germano; Guido, Eleonora; Hahn, Steffen; Hamal, Petr; Hampel, Matías Rolf; Hansen, Patricia María; Harari, Diego; Harvey, Violet M.; Haungs, Andreas; Hebbeker, Thomas; Heck, Dieter; Hill, Gary C.; Hojvat, Carlos; Hörandel, Jörg; Horvath, Pavel; Hrabovsky, Miroslav; Huege, Tim; Insolia, Antonio; Isar, Paula Gina; Janecek, Petr; Johnsen, Jeffrey A.; Juryšek, Jakub; Kääpä, Alex; Kampert, Karl-Heinz; Karastathis, Nikolaos; Keilhauer, Bianca; Kemp, Julian; Khakurdikar, Abha; Kizakke Covilakam, Varada Varma; Klages, Hans; Kleifges, Matthias; Kleinfeller, Jonny; Köpke, Marcel; Kunka, Norbert; Lago, Bruno L.; Lang, Rodrigo Guedes; Langner, Niklas; Leigui de Oliveira, Marcelo Augusto; Lenok, Vladimir; Letessier-Selvon, Antoine; Lhenry-Yvon, Isabelle; Lo Presti, Domenico; Lopes, Luis; López, Rebeca; Lu, Lu; Luce, Quentin; Lundquist, Jon Paul; Machado Payeras, Allan; Mancarella, Giovanni; Mandat, Dusan; Manning, Bradley C.; Manshanden, Julien; Mantsch, Paul; Marafico, Sullivan; Mariazzi, Analisa; Maris, Ioana Codrina; Marsella, Giovanni; Martello, Daniele; Martinelli, Sara; Martínez Bravo, Oscar; Mastrodicasa, Massimo; Mathes, Hermann-Josef; Matthews, James; Matthiae, Giorgio; Mayotte, Eric; Mazur, Peter; Medina-Tanco, Gustavo; Melo, Diego; Menshikov, Alexander; Merenda, Kevin-Druis; Michal, Stanislav; Micheletti, Maria Isabel; Miramonti, Lino; Mollerach, Silvia; Montanet, François; Morello, Carlo; Mostafa, Miguel; Müller, Ana L.; Muller, Marcio Aparecido; Mulrey, Katharine; Mussa, Roberto; Muzio, Marco Stein; Namasaka, Wilson M.; Nasr-Esfahani, Alina; Nellen, Lukas; Niculescu-Oglinzanu, Mihai; Niechciol, Marcus; Nitz, Dave; Nosek, Dalibor; Novotný, Vladimír; Nozka, Libor; Nucita, Achille; Nunez, Luis A.; Palatka, Miroslav; Pallotta, Juan; Papenbreer, Philipp; Parente, Gonzalo; Parra, Alejandra; Pawlowsky, Jannis; Pech, Miroslav; Pedreira, Francisco; Pękala, Jan; Pelayo, Rodrigo; Peña-Rodríguez, Jesús; Pereira Martins, Edyvania Emily; Perez Armand, Johnnier; Pérez Bertolli, Carmina; Perlin, Matías; Perrone, Lorenzo; Petrera, Sergio; Pierog, Tanguy; Pimenta, Mário; Pirronello, Valerio; Platino, Manuel; Pont, Bjarni; Pothast, Mart; Privitera, Paolo; Prouza, Michael; Puyleart, Andrew; Querchfeld, Sven; Rautenberg, Julian; Ravignani, Diego; Reininghaus, Maximilian; Ridky, Jan; Riehn, Felix; Risse, Markus; Rizi, Vincenzo; Rodrigues Carvalho, Washington De; Rodriguez Rojo, Jorge Rubén; Roncoroni, Matías J.; Rossoni, Simone; Roth, Markus; Roulet, Esteban; Rovero, Adrian; Ruehl, Philip; Saftoiu, Alexandra; Salamida, Francesco; Salazar, Humberto Ibarguen; Salina, Gaetano; Sanabria Gomez, Jose; Sánchez, Federico Andrés; Santos, Edivaldo Moura; Santos, Eva; Sarazin, Fred; Sarmento, Raul; Sarmiento-Cano, Christian; Sato, Ricardo; Schäfer, Christoph M.; Scherini, Viviana; Schieler, Harald; Schimassek, Martin; Schimp, Michael; Schlüter, Felix; Schmidt, David; Scholten, Olaf; Schovanek, Petr; Schröder, Frank G.; Schröder, Sonja; Schulte, Josina; Sciutto, Sergio; Scornavacche, Marina; Segreto, Alberto; Sehgal, Srijan; Shellard, Ronald C.; Sigl, Guenter; Silli, Gaia; Sima, Octavian; Smida, Radomir; Sommers, Paul; Soriano, Jorge F.; Souchard, Julien; Squartini, Ruben; Stadelmaier, Maximilian; Stanca, Denis; Stanič, Samo; Stasielak, Jaroslaw; Stassi, Patrick; Streich, Alexander; Suárez-Durán, Mauricio; Sudholz, Tristan; Suomijarvi, Tiina; Supanitsky, A. Daniel; Szadkowski, Zbigniew; Tapia, Alex; Taricco, Carla; Timmermans, Charles; Tkachenko, Olena; Tobiska, Petr; Todero Peixoto, Carlos J.; Tomé, Bernardo; Torrès, Zoé; Travaini, Andres; Travnicek, Petr; Trimarelli, Caterina; Tueros, Matias; Ulrich, Ralf; Unger, Michael; Vaclavek, Lukáš; Vacula, Martin; Valdés Galicia, Jose F.; Valore, Laura; Varela, Enrique; Vásquez-Ramírez, Adriana; Veberic, Darko; Ventura, Cynthia; Vergara Quispe, Indira D.; Verzi, Valerio; Vicha, Jakub; Vink, Jacco; Vorobiov, Serguei; Wahlberg, Hernan; Watanabe, Clara Keiko Oliveira; Watson, Alan; Weber, Marc; Weindl, Andreas; Wiencke, Lawrence; Wilczyński, Henryk; Wirtz, Marcus; Wittkowski, David; Wundheiler, Brian; Yushkov, Alexey; Zapparrata, Orazio; Zas, Enrique; Zavrtanik, Danilo; Zavrtanik, Marko; Zehrer, Lukas |
| Source: |
ISSN: 1824-8039. |
| Publisher Information: |
Scuola Internazionale Superiore di Studi Avanzati |
| Publication Year: |
2021 |
| Collection: |
KITopen (Karlsruhe Institute of Technologie) |
| Subject Terms: |
ddc:530; Physics; info:eu-repo/classification/ddc/530 |
| Description: |
The Pierre Auger Observatory is the most sensitive detector to primary photons with energies above ∼0.2 EeV. It measures extensive air showers using a hybrid technique that combines a fluorescence detector (FD) with a ground array of particle detectors (SD). The signatures of a photon-induced air shower are a larger atmospheric depth at the shower maximum (X$_{max}$) and a steeper lateral distribution function, along with a lower number of muons with respect to the bulk of hadron-induced background. Using observables measured by the FD and SD, three photon searches in different energy bands are performed. In particular, between threshold energies of 1-10 EeV, a new analysis technique has been developed by combining the FD-based measurement of X$_{max}$ with the SD signal through a parameter related to its muon content, derived from the universality of the air showers. This technique has led to a better photon/hadron separation and, consequently, to a higher search sensitivity, resulting in a tighter upper limit than before. The outcome of this new analysis is presented here, along with previous results in the energy ranges below 1 EeV and above 10 EeV. From the data collected by the Pierre Auger Observatory in about 15 years of operation, the most stringent constraints on the fraction of photons in the cosmic flux are set over almost three decades in energy. |
| Document Type: |
article in journal/newspaper; conference object |
| File Description: |
application/pdf |
| Language: |
English |
| ISSN: |
1824-8039 |
| Relation: |
Pos Proceedings of Science; info:eu-repo/semantics/altIdentifier/issn/1824-8039; https://publikationen.bibliothek.kit.edu/1000138519; https://publikationen.bibliothek.kit.edu/1000138519/128484230; https://doi.org/10.5445/IR/1000138519 |
| DOI: |
10.5445/IR/1000138519 |
| Availability: |
https://publikationen.bibliothek.kit.edu/1000138519; https://publikationen.bibliothek.kit.edu/1000138519/128484230; https://doi.org/10.5445/IR/1000138519 |
| Rights: |
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.de ; info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.A935B2B5 |
| Database: |
BASE |