作者
Jakub Vicha, Pedro Abreu, Marco Aglietta, Justin M Albury, Ingomar Allekotte, Alejandro Almela, Jaime Alvarez-Muniz, Rafael Alves Batista, Gioacchino Alex Anastasi, Luis A Anchordoqui, Belén Andrada, Sofia Andringa, Carla Aramo, Paulo Ricardo Araújo Ferreira, Juan Carlos Arteaga Velazquez, Hernán Gonzalo Asorey, Pedro Assis, Gualberto Avila, Alina Mihaela Badescu, Alena Bakalova, Alexandru Balaceanu, Felicia Barbato, Ricardo Jorge Barreira Luz, Karl-Heinz Becker, Jose A Bellido, Corinne Berat, Mario Edoardo Bertaina, Xavier Bertou, Peter L Biermann, Virginia Binet, Kathrin Bismark, Teresa Bister, Jonathan Biteau, Jiri Blazek, Carla Bleve, Martina Bohacova, Denise Boncioli, Carla Bonifazi, Luan Bonneau Arbeletche, Nataliia Borodai, Ana Martina Botti, Jeffrey Brack, Thomas Bretz, P Gabriel Brichetto Orchera, Florian Lukas Briechle, Peter Buchholz, Antonio Bueno, Stijn Buitink, Mario Buscemi, Max Büsken, Karen S Caballero-Mora, Lorenzo Caccianiga, Fabrizia Canfora, Ioana Caracas, Juan Miguel Carceller, Rossella Caruso, Antonella Castellina, Gabriella Cataldi, Lorenzo Cazon, Marcos Cerda, Jose Augusto Chinellato, Jiří Chudoba, Ladislav Chytka, Roger W Clay, Agustín Cobos Cerutti, Roberta Colalillo, Alan Coleman, Maria Rita Coluccia, Rúben Conceição, Antonio Condorelli, Giovanni Consolati, Fabio Convenga, Diego Correia dos Santos, Corbin Covault, Sergio Dasso, Kai Daumiller, Bruce R Dawson, Jarryd A Day, Rogerio M de Almeida, Joaquín de Jesús, Sijbrand J de Jong, Giuseppe De Mauro, João de Mello Neto, Ivan De Mitri, Jaime de Oliveira, Danelise de Oliveira Franco, Francesco de Palma, Vitor de Souza, Emanuele De Vito, Mariano del Río, Olivier Deligny, Luca Deval, Armando di Matteo, Carola Dobrigkeit, Juan Carlos D'Olivo, Luis Miguel Domingues Mendes, Rita dos Anjos, Diego dos Santos, Maria Teresa Dova, Jan Ebr, Ralph Engel, Italo Epicoco, Martin Erdmann, Carlos O Escobar, Alberto Etchegoyen, Heino Falcke, John Farmer, Glennys R Farrar, Anderson Fauth, Norberto Fazzini, Fridtjof Feldbusch, Francesco Fenu, Brian Fick, Juan Manuel Figueira, Andrej Filipcic, Thomas Fitoussi, Tomáš Fodran, Martín Miguel Freire, Toshihiro Fujii, Alan Fuster, Cristina Galea, Claudio Galelli, Beatriz García, Adrianna Luz García Vegas, Hartmut Gemmeke, Flavia Gesualdi, Alexandru Gherghel-Lascu, Piera Luisa Ghia, Ugo Giaccari, Marco Giammarchi, Jonas Glombitza, Fabian Gobbi, Geraldina Golup, Mariano Gómez Berisso, Primo F Gómez Vitale, Juan Pablo Gongora, Juan Manuel González, Nicolas Martin Gonzalez, Isabel Goos, Dariusz Gora, Alessio Gorgi, Marvin Gottowik, Trent D Grubb, Germano Guedes, Eleonora Guido, Steffen Hahn, Petr Hamal, Matías Rolf Hampel, Patricia María Hansen, Diego Harari
发表日期
2021
期刊
POS PROCEEDINGS OF SCIENCE
卷号
395
页码范围
310
出版商
Sissa Medialab Srl
简介
We present a new method to explore simple ad-hoc adjustments to the predictions of hadronic interaction models to improve their consistency with observed two-dimensional distributions of the depth of shower maximum, Xmax, and signal at ground level, as a function of zenith angle. The method relies on the assumption that the mass composition is the same at all zenith angles, while the atmospheric shower development and attenuation depend on composition in a correlated way. In the present work, for each of the three leading LHC-tuned hadronic interaction models, we allow a global shift ΔXmax of the predicted shower maximum, which is the same for every mass and energy, and a rescaling RHad of the hadronic component at ground level which depends on the zenith angle. We apply the analysis to 2297 events reconstructed by both fluorescence and surface detectors at the Pierre Auger Observatory with energies 1018.5− 1019.0 eV. Given the modeling assumptions made in this analysis, the best fit reaches its optimum value when shifting the Xmax predictions of hadronic interaction models to deeper values and increasing the hadronic signal at both extreme zenith angles. The resulting change in the composition towards heavier primaries alleviates the previously identified model deficit in the hadronic signal (commonly called the muon deficit), but does not remove it. Because of the size of the required corrections ΔXmax and RHad and the large number of events in the sample, the statistical significance of the corrections is large, greater than 5σstat even for the combination of experimental systematic shifts within 1σsys that are the most …
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J Vicha, P Abreu, M Aglietta, JM Albury, I Allekotte… - POS PROCEEDINGS OF SCIENCE, 2021