The surface detector array of the Pierre Auger Observatory measures the arrival time distribution of particles and it therefore provides indirect information on the longitudinal development of the muonic component of extensive air showers. In this work, the depth at which the muon production is maximum and the corresponding shower-to-shower fluctuations are reconstructed for more than 2000 events above 15 EeV (1.5X10^19 eV), in a wide range of zenith angles between 45° and 65°. Both observables are analysed in terms of mass composition of ultra-high energy cosmic rays, one of the most intriguing issues of modern astrophysics. In addition, these observables are exploited to attempt to constrain the most up-to date hadronic interactions models, which are used in the simulation of extensive air showers.

MAXIMUM MUON PRODUCTION DEPTH AND ITS FLUCTUATIONS ABOVE 15 EEV AT THE PIERRE AUGER OBSERVATORY: MASS COMPOSITION AND CONSTRAINTS ON HADRONIC INTERACTION MODELS / M. Mallamaci ; supervisor: L. Miramonti ; co-supervisor: B. Caccianiga ; referee: M. Mariotti ; referee: A. Insolia ; coordinator: F. Ragusa. - : . DIPARTIMENTO DI FISICA, 2017 Mar 20. ((29. ciclo, Anno Accademico 2016. [10.13130/mallamaci-manuela_phd2017-03-20].

MAXIMUM MUON PRODUCTION DEPTH AND ITS FLUCTUATIONS ABOVE 15 EEV AT THE PIERRE AUGER OBSERVATORY: MASS COMPOSITION AND CONSTRAINTS ON HADRONIC INTERACTION MODELS

M. Mallamaci
2017-03-20

Abstract

The surface detector array of the Pierre Auger Observatory measures the arrival time distribution of particles and it therefore provides indirect information on the longitudinal development of the muonic component of extensive air showers. In this work, the depth at which the muon production is maximum and the corresponding shower-to-shower fluctuations are reconstructed for more than 2000 events above 15 EeV (1.5X10^19 eV), in a wide range of zenith angles between 45° and 65°. Both observables are analysed in terms of mass composition of ultra-high energy cosmic rays, one of the most intriguing issues of modern astrophysics. In addition, these observables are exploited to attempt to constrain the most up-to date hadronic interactions models, which are used in the simulation of extensive air showers.
MIRAMONTI, LINO
MIRAMONTI, LINO
CACCIANIGA, BARBARA
RAGUSA, FRANCESCO
ultra-high energy cosmic rays ; muon production depth ; mass composition ; hadronic interactions
Settore FIS/04 - Fisica Nucleare e Subnucleare
MAXIMUM MUON PRODUCTION DEPTH AND ITS FLUCTUATIONS ABOVE 15 EEV AT THE PIERRE AUGER OBSERVATORY: MASS COMPOSITION AND CONSTRAINTS ON HADRONIC INTERACTION MODELS / M. Mallamaci ; supervisor: L. Miramonti ; co-supervisor: B. Caccianiga ; referee: M. Mariotti ; referee: A. Insolia ; coordinator: F. Ragusa. - : . DIPARTIMENTO DI FISICA, 2017 Mar 20. ((29. ciclo, Anno Accademico 2016. [10.13130/mallamaci-manuela_phd2017-03-20].
Doctoral Thesis
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/489315
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