@misc{10481/69265,
year = {2021},
month = {4},
url = {http://hdl.handle.net/10481/69265},
abstract = {We present the first measurement of the fluctuations in the number of muons in extensive air showers produced by ultrahigh energy cosmic rays. We find that the measured fluctuations are in good agreement with predictions from air shower simulations. This observation provides new insights into the origin of the previously reported deficit of muons in air shower simulations and constrains models of hadronic interactions at ultrahigh energies. Our measurement is compatible with the muon deficit originating from small deviations in the predictions from hadronic interaction models of particle production that accumulate as the showers develop.},
organization = {Argentina-Comision Nacional de Energia Atomica},
organization = {ANPCyT},
organization = {Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)},
organization = {Gobierno de la Provincia de Mendoza},
organization = {Municipalidad de Malargue},
organization = {NDM Holdings},
organization = {Valle Las Lenas},
organization = {Australian Research Council},
organization = {Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)},
organization = {Fundacao de Apoio a Pesquisa do Distrito Federal (FAPDF)},
organization = {Financiadora de Inovacao e Pesquisa (Finep)},
organization = {Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio De Janeiro (FAPERJ)},
organization = {Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
2019/10151-2
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1999/05404-3},
organization = {Ministerio da Ciencia, Tecnologia, Inovacoes e Comunicacoes (MCTIC)},
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organization = {France-Centre de Calcul IN2P3/CNRS},
organization = {Centre National de la Recherche Scientifique (CNRS)},
organization = {Region Ile-de-France},
organization = {Centre National de la Recherche Scientifique (CNRS)},
organization = {Departement Sciences de l'Univers (SDU-INSU/CNRS)},
organization = {French National Research Agency (ANR)

LABEX ANR-10-LABX-63
ANR11-IDEX-0004-02},
organization = {Federal Ministry of Education & Research (BMBF)},
organization = {German Research Foundation (DFG)},
organization = {Finanzministerium Baden-Wurttemberg},
organization = {Helmholtz Alliance for Astroparticle Physics (HAP)},
organization = {Helmholtz Association},
organization = {Ministerium fur Innovation, Wissenschaft und Forschung des Landes Nordrhein-Westfalen},
organization = {Ministerium fur Wissenschaft, Forschung und Kunst des Landes Baden-Wurttemberg},
organization = {Italy-Istituto Nazionale di Fisica Nucleare (INFN)},
organization = {Istituto Nazionale Astrofisica (INAF)},
organization = {Ministry of Education, Universities and Research (MIUR)},
organization = {CETEMPS Center of Excellence},
organization = {Ministry of Foreign Affairs and International Cooperation (Italy)},
organization = {Consejo Nacional de Ciencia y Tecnologia (CONACyT)

167733},
organization = {Universidad Nacional Autonoma de Mexico (UNAM), PAPIIT DGAPA-UNAM},
organization = {Netherlands-Ministry of Education, Culture and Science},
organization = {Netherlands Organization for Scientific Research (NWO)},
organization = {Dutch national e-infrastructure},
organization = {SURF Cooperative},
organization = {Poland-Ministry of Science and Higher Education 

DIR/WK/2018/11},
organization = {National Science Centre, Poland

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2016/23/B/ST9/01635
HARMONIA 5-2013/10/M/ST9/00062
UMO-2016/22/M/ST9/00198},
organization = {Portugal -Portuguese national funds},
organization = {FEDER funds within Programa Operacional Factores de Competitividade through Fundacao para a Ciencia e a Tecnologia (COMPETE)},
organization = {Romania-Romanian Ministry of Education and Research, the Program Nucleu within MCI 

PN19150201/16N/2019
PN19060102},
organization = {Romania-Romanian Ministry of Educatio n and Research, the Program Nucleu within PNCDI III 

PN-III-P1-1.2-PCCDI-2017-0839/19PCCDI/2018},
organization = {Slovenian Research Agency - Slovenia

P1-0031
P1-0385
I00033
N1-0111},
organization = {Spain-Ministerio de Economia, Industria y Competitividad 

FPA2017-85114-P
FPA2017-85197-P},
organization = {Xunta de Galicia

European Commission

ED431C 2017/07},
organization = {Junta de Andalucia

SOMM17/6104/UGR},
organization = {European Commission},
organization = {RENATA Red Nacional Tematica de Astroparticulas 

FPA2015-68783-REDT},
organization = {Maria de Maeztu Unit of Excellence 

MDM-2016-0692},
organization = {United States Department of Energy (DOE)

DE-AC0207CH11359
DE-FR02-04ER41300
DE-FG0299ER41107
DE-SC0011689},
organization = {National Science Foundation (NSF)

0450696},
organization = {Grainger Foundation},
organization = {Marie Curie-IRSES/EPLANET},
organization = {European Particle Physics Latin American Network},
organization = {UNESCO},
publisher = {American Physical Society},
title = {Measurement of the Fluctuations in the Number of Muons in Extensive Air Showers with the Pierre Auger Observatory},
doi = {10.1103/PhysRevLett.126.152002},
author = {Aab, A. and Bueno Villar, Antonio and Carceller López, Juan Miguel and Pierre Auger Collaboration},
}