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Halim, A. Abdul
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Abreu, P.
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Aglietta, M.
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Allekotte, I.
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Cheminant, K. Almeida
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Almela, A.
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Aloisio, R.
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Alvarez-Muniz, J.
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Ammerman Yebra, J.
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Anastasi, G. A.
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Anchordoqui, L.
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Andrada, B.
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Dourado, L. Andrade
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Andringa, S.
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Apollonio, L.
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Aramo, C.
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Ferreira, P. R. Araujo
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Arnone, E.
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Arteaga Velazquez, J. C.
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Assis, P.
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Avila, G.
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Avocone, E.
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Bakalova, A.
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Barbato, F.
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Mocellin, A. Bartz
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Berat, C.
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Bertaina, M. E.
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Bhatta, G.
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Bianciotto, M.
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Biermann, P. L.
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Binet, V.
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Bismark, K.
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Bister, T.
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Biteau, J.
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Blazek, J.
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Bleve, C.
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Bluemer, J.
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Bohacova, M.
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Boncioli, D.
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Bonifazi, C.
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Bonneau Arbeletche, L.
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Borodai, N.
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Brack, J.
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Brichetto Orchera, P. G.
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Briechle, F. L.
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Bueno, A.
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Buitink, S.
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Buscemi, M.
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Buesken, M.
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Bwembya, A.
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Caballero-Mora, K. S.
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Cabana-Freire, S.
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Caccianiga, L.
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Campuzano, F.
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Caruso, R.
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Castellina, A.
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Catalani, F.
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Cataldi, G.
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Cazon, L.
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Cerda, M.
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Cermakova, B.
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Cermenati, A.
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Chinellato, J. A.
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Chudoba, J.
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Chytka, L.
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Clay, R. W.
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Cobos Cerutti, A. C.
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Colalillo, R.
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Coluccia, M. R.
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Conceicao, R.
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Condorelli, A.
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Consolati, G.
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Conte, M.
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Convenga, F.
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Correia dos Santos, D.
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Costa, P. J.
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Covault, C. E.
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Cristinziani, M.
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Cruz Sanchez, C. S.
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Dasso, S.
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Daumiller, K.
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Dawson, B. R.
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de Almeida, R. M.
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de Errico, B.
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de Jesus, J.
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de Jong, S. J.
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de Mello Neto, J. R. T.
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De Mitri, I.
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de Oliveira, J.
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Franco, D. de Oliveira
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de Palma, F.
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de Souza, V.
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De Vito, E.
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Del Popolo, A.
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Deligny, O.
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Denner, N.
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Deval, L.
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di Matteo, A.
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Do, J. A.
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Dobre, M.
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Dobrigkeit, C.
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D'Olivo, J. C.
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Domingues Mendes, L. M.
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Dorosti, Q.
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dos Anjos, J. C.
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dos Anjos, R. C.
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Ebr, J.
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Ellwanger, F.
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Emam, M.
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Engel, R.
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Epicoco, I.
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Erdmann, M.
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Etchegoyen, A.
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Evoli, C.
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Falcke, H.
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Farrar, G.
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Fauth, A. C.
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Fehler, T.
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Feldbusch, F.
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Fenu, F.
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Fernandes, A.
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Fick, B.
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Figueira, J. M.
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Filip, P.
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Filipcic, A.
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Fitoussi, T.
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Flaggs, B.
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Fodran, T.
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Fujii, T.
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Fuster, A.
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Galea, C.
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Garcia, B.
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Gaudu, C.
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Gherghel-Lascu, A.
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Ghia, P. L.
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Giaccari, U.
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Glombitza, J.
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Gobbi, F.
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Gollan, F.
;
Golup, G.
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Gomez Berisso, M.
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Gomez Vitale, P. F.
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Gongora, J. P.
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Gonzalez, J. M.
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Gonzalez, N.
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Gora, D.
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Gorgi, A.
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Gottowik, M.
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Guarino, F.
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Guedes, G. P.
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Guido, E.
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Guelzow, L.
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Hahn, S.
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Hamal, P.
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Hampel, M. R.
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Hansen, P.
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Harari, D.
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Harvey, V. M.
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Haungs, A.
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Hebbeker, T.
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Hojvat, C.
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Horandel, J. R.
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Horvath, P.
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Hrabovsky, M.
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Huege, T.
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Insolia, A.
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Isar, P. G.
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Janecek, P.
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Jilek, V.
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Johnsen, J. A.
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Jurysek, J.
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Kampert, K. -H.
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Keilhauer, B.
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Khakurdikar, A.
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Kizakke Covilakam, V. V.
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Klages, H. O.
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Kleifges, M.
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Knapp, F.
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Koehler, J.
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Krieger, F.
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Kunka, N.
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Lago, B. L.
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Langner, N.
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Leigui de Oliveira, M. A.
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Lema-Capeans, Y.
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Letessier-Selvon, A.
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Lhenry-Yvon, I.
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Lopes, L.
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Lu, L.
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Luce, Q.
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Lundquist, J. P.
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Machado Payeras, A.
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Majercakova, M.
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Mandat, D.
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Manning, B. C.
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Mantsch, P.
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Mariani, F. M.
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Mariazzi, A. G.
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Maris, I. C.
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Marsella, G.
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Martello, D.
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Martinelli, S.
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Martinez Bravo, O.
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Martins, M. A.
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Mathes, H. -J.
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Matthews, J.
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Matthiae, G.
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Mayotte, E.
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Mayotte, S.
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Mazur, P. O.
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Medina-Tanco, G.
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Meinert, J.
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Melo, D.
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Menshikov, A.
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Merx, C.
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Michal, S.
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Micheletti, M. I.
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Miramonti, L.
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Mollerach, S.
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Montanet, F.
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Morejon, L.
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Mulrey, K.
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Mussa, R.
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Namasaka, W. M.
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Negi, S.
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Nellen, L.
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Nguyen, K.
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Nicora, G.
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Niechciol, M.
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Nitz, D.
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Nosek, D.
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Novotny, V.
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Nozka, L.
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Nucita, A.
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Nunez, L. A.
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Oliveira, C.
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Palatka, M.
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Pallotta, J.
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Panja, S.
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Parente, G.
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Paulsen, T.
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Pawlowsky, J.
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Pech, M.
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Pekala, J.
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Pelayo, R.
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Pelgrims, V.
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Pereira, L. A. S.
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Pereira Martins, E. E.
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Perez Bertolli, C.
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Perrone, L.
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Petrera, S.
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Petrucci, C.
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Pierog, T.
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Pimenta, M.
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Platino, M.
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Pont, B.
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Pothast, M.
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Shahvar, M. Pourmohammad
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Privitera, P.
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Prouza, M.
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Querchfeld, S.
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Rautenberg, J.
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Ravignani, D.
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Reginatto Akim, J. V.
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Reininghaus, M.
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Reuzki, A.
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Ridky, J.
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Riehn, F.
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Risse, M.
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Rizi, V.
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de Carvalho, W. Rodrigues
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Rodriguez, E.
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Rodriguez Rojo, J.
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Roncoroni, M. J.
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Rossoni, S.
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Roth, M.
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Roulet, E.
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Rovero, A. C.
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Saftoiu, A.
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Saharan, M.
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Salamida, F.
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Salazar, H.
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Salina, G.
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Sanabria Gomez, J. D.
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Sanchez, F.
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Santos, E. M.
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Santos, E.
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Sarazin, F.
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Sarmento, R.
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Sato, R.
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Savina, P.
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Schaefer, C. M.
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Scherini, V.
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Schieler, H.
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Schimassek, M.
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Schimp, M.
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Schmidt, D.
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Scholten, O.
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Schoorlemmer, H.
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Schovanek, P.
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Schroeder, F. G.
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Schulte, J.
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Schulz, T.
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Sciutto, S. J.
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Scornavacche, M.
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Sedoski, A.
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Segreto, A.
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Sehgal, S.
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Shivashankara, S. U.
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Sigl, G.
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Simkova, K.
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Simon, F.
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Smau, R.
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Smida, R.
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Sommers, P.
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Squartini, R.
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Stadelmaier, M.
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Stanic, S.
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Stasielak, J.
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Stassi, P.
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Straehnz, S.
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Straub, M.
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Suomijaervi, T.
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Supanitsky, A. D.
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Svozilikova, Z.
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Szadkowski, Z.
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Tairli, F.
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Tapia, A.
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Taricco, C.
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Timmermans, C.
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Tkachenko, O.
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Tobiska, P.
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Todero Peixoto, C. J.
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Tome, B.
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Torres, Z.
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Travaini, A.
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Travnicek, P.
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Tueros, M.
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Unger, M.
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Uzeiroska, R.
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Vaclavek, L.
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Vacula, M.
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Valdes Galicia, J. F.
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Valore, L.
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Varela, E.
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Vasickova, V.
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Vasquez-Ramirez, A.
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Veberic, D.
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Vergara Quispe, I. D.
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Verzi, V.
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Vicha, J.
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Vink, J.
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Vorobiov, S.
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Watanabe, C.
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Watson, A. A.
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Weindl, A.
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Wiencke, L.
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Wilczynski, H.
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Wittkowski, D.
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Wundheiler, B.
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Yue, B.
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Yushkov, A.
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Zapparrata, O.
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Zas, E.
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Zavrtanik, D.
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Zavrtanik, M.
Total Authors: 366
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW D; v. 110, n. 6, p. 21-pg., 2024-09-25. |
| Abstract | |
The Pierre Auger Observatory is the most sensitive instrument to detect photons with energies above 1017 eV. It measures extensive air showers generated by ultrahigh energy cosmic rays using a hybrid technique that exploits the combination of a fluorescence detector with a ground array of particle detectors. The signatures of a photon-induced air shower are a larger atmospheric depth of 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 cascades. In this work, a new analysis technique in the energy interval between 1 and 30 EeV (1 EeV = 10(18) eV) has been developed by combining the fluorescence detector-based measurement of Xmax with the specific features of the surface detector signal through a parameter related to the air shower muon content, derived from the universality of the air shower development. No evidence of a statistically significant signal due to photon primaries was found using data collected in about 12 years of operation. Thus, upper bounds to the integral photon flux have been set using a detailed calculation of the detector exposure, in combination with a data-driven background estimation. The derived 95% confidence level upper limits are 0.0403, 0.01113, 0.0035, 0.0023, and 0.0021 km(-2) sr(-1) yr(-1) above 1, 2, 3, 5, and 10 EeV, respectively, leading to the most stringent upper limits on the photon flux in the EeV range. Compared with past results, the upper limits were improved by about 40% for the lowest energy threshold and by a factor 3 above 3 EeV, where no candidates were found and the expected background is negligible. The presented limits can be used to probe the assumptions on chemical composition of ultrahigh energy cosmic rays and allow for the constraint of the mass and lifetime phase space of super-heavy dark matter particles. (AU) | |
| FAPESP's process: | 19/10151-2 - Study of Ultra-High Energy Cosmic Rays with the Pierre Auger Observatory upgrade AugerPrime |
| Grantee: | Carola Dobrigkeit Chinellato |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 10/07359-6 - Study of cosmic rays of highest energies with the Pierre Auger Observatory |
| Grantee: | Carola Dobrigkeit Chinellato |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 99/05404-3 - Pierre Auger Observatory |
| Grantee: | Carlos Ourivio Escobar |
| Support Opportunities: | Research Projects - Thematic Grants |