article · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology · 2014
Depth of maximum of air-shower profiles at the Pierre Auger Observatory. II. Composition implications
A. Aab, P. Abreu, M. Aglietta, E. J. Ahn, I. Al Samarai, I. F. M. Albuquerque, I. Allekotte, J. Allen, P. Allison, A. Almela, J. Alvarez Castillo, Jaime Álvarez-Muñiz, Rafael Alves Batista, M. Ambrosio, A. Aminaei, Luis A. Anchordoqui, S. Andringa, C. Aramo, V. Aranda, F. Arqueros, H. Asorey, P. Assis, J. Aublin, M. Ave, M. Avenier, G. Ávila, N. Awal, Alina Mihaela Badescu, K. B. Barber, J. Bäuml, C. Baus, J. J. Beatty, Klaus Becker, J. A. Bellido, C. Bérat, Mario Bertania, X. Bertou, Peter L. Biermann, P. Billoir, S. G. Blaess, F. Blanco, C. Bleve, H. Blümer, M. Boháčová, Denise Boncioli, C. Bonifazi, R. Bonino, Nataliia Borodai, J. Brack, I.M. Brâncuş and 435 more
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Abstract
Using the data taken at the Pierre Auger Observatory between December 2004 and December 2012, we have examined the implications of the distributions of depths of atmospheric shower maximum (${X}_{\mathrm{max}}$), using a hybrid technique, for composition and hadronic interaction models. We do this by fitting the distributions with predictions from a variety of hadronic interaction models for variations in the composition of the primary cosmic rays and examining the quality of the fit. Regardless of what interaction model is assumed, we find that our data are not well described by a mix of protons and iron nuclei over most of the energy range. Acceptable fits can be obtained when intermediate masses are included, and when this is done consistent results for the proton and iron-nuclei contributions can be found using the available models. We observe a strong energy dependence of the resulting proton fractions, and find no support from any of the models for a significant contribution from iron nuclei. However, we also observe a significant disagreement between the models with respect to the relative contributions of the intermediate components.
Cite this paper
Aab, A., Abreu, P., Aglietta, M., Ahn, E. J., Al Samarai, I., Albuquerque, I. F. M., Allekotte, I., Allen, J., Allison, P., Almela, A., Castillo, J. A., Álvarez-Muñiz, J., Batista, R. A., Ambrosio, M., Aminaei, A., Anchordoqui, L. A., Andringa, S., Aramo, C., Aranda, V., . . . Brâncuş, I. (2014). Depth of maximum of air-shower profiles at the Pierre Auger Observatory. II. Composition implications. Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology, 90(12). https://doi.org/10.1103/physrevd.90.122006
Aab, A., et al. “Depth of maximum of air-shower profiles at the Pierre Auger Observatory. II. Composition implications.” Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology, vol. 90, no. 12, 2014, https://doi.org/10.1103/physrevd.90.122006.
Aab, A., P. Abreu, M. Aglietta, E. J. Ahn, I. Al Samarai, I. F. M. Albuquerque, I. Allekotte, et al. 2014. “Depth of maximum of air-shower profiles at the Pierre Auger Observatory. II. Composition implications.” Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology 90 (12). https://doi.org/10.1103/physrevd.90.122006.
Aab, A. et al. (2014) ‘Depth of maximum of air-shower profiles at the Pierre Auger Observatory. II. Composition implications’, Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology, 90(12). Available at: https://doi.org/10.1103/physrevd.90.122006.
@article{aab2014depth,
title = {{Depth of maximum of air-shower profiles at the Pierre Auger Observatory. II. Composition implications}},
author = {Aab, A. and Abreu, P. and Aglietta, M. and Ahn, E. J. and Al Samarai, I. and Albuquerque, I. F. M. and Allekotte, I. and Allen, J. and Allison, P. and Almela, A. and Castillo, J. Alvarez and Álvarez-Muñiz, Jaime and Batista, Rafael Alves and Ambrosio, M. and Aminaei, A. and Anchordoqui, Luis A. and Andringa, S. and Aramo, C. and Aranda, V. and Arqueros, F. and Asorey, H. and Assis, P. and Aublin, J. and Ave, M. and Avenier, M. and Ávila, G. and Awal, N. and Badescu, Alina Mihaela and Barber, K. B. and Bäuml, J. and Baus, C. and Beatty, J. J. and Becker, Klaus and Bellido, J. A. and Bérat, C. and Bertania, Mario and Bertou, X. and Biermann, Peter L. and Billoir, P. and Blaess, S. G. and Blanco, F. and Bleve, C. and Blümer, H. and Boháčová, M. and Boncioli, Denise and Bonifazi, C. and Bonino, R. and Borodai, Nataliia and Brack, J. and Brâncuş, I.M. and others},
journal = {Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology},
volume = {90},
number = {12},
year = {2014},
doi = {10.1103/physrevd.90.122006}
}Made from the index record. Check names, capitalisation and page numbers against the paper. Need another style? AI for Research has over 10,000.