@article{30d1f4a8de2f4b48bc4cde129e0a339f,
title = "Measurement of the Fluctuations in the Number of Muons in Extensive Air Showers with the Pierre Auger Observatory",
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.",
author = "{(Pierre Auger Collaboration)} and A. Aab and P. Abreu and M. Aglietta and Albury, {J. M.} and I. Allekotte and A. Almela and J. Alvarez-Mu{\~n}iz and {Alves Batista}, R. and Anastasi, {G. A.} and L. Anchordoqui and B. Andrada and S. Andringa and C. Aramo and {Ara{\'u}jo Ferreira}, {P. R.} and H. Asorey and P. Assis and G. Avila and Badescu, {A. M.} and A. Bakalova and A. Balaceanu and F. Barbato and {Barreira Luz}, {R. J.} and Becker, {K. H.} and Bellido, {J. A.} and C. Berat and Bertaina, {M. E.} and X. Bertou and Biermann, {P. L.} and T. Bister and J. Biteau and J. Blazek and C. Bleve and M. Boh{\'a}{\v c}ov{\'a} and D. Boncioli and C. Bonifazi and {Bonneau Arbeletche}, L. and N. Borodai and Botti, {A. M.} and J. Brack and T. Bretz and Briechle, {F. L.} and P. Buchholz and A. Bueno and S. Buitink and M. Buscemi and Caballero-Mora, {K. S.} and L. Caccianiga and A. Cancio and F. Canfora and C. Ventura",
note = "Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",
year = "2021",
month = apr,
day = "16",
doi = "10.1103/PhysRevLett.126.152002",
language = "American English",
volume = "126",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "15",
}