Cosmic ray spectrum of protons plus helium nuclei between 6 and 158 TeV from HAWC data

A. Albert; R. Alfaro; C. Alvarez; J. R. Angeles Camacho; J. C. Arteaga-Velázquez; K. P. Arunbabu; D. Avila Rojas; H. A. Ayala Solares; E. Belmont-Moreno; C. Brisbois; K. S. Caballero-Mora; T. Capistrán; A. Carramiñana; S. Casanova; U. Cotti; J. Cotzomi; E. De La Fuente; R. Diaz Hernandez; M. A. Duvernois; M. Durocher; J. C. Díaz-Vélez; C. Espinoza; N. Fraija; J. A. García-González; F. Garfias; M. M. González; J. A. Goodman; J. P. Harding; B. Hona; D. Huang; F. Hueyotl-Zahuantitla; P. Hüntemeyer; A. Iriarte; V. Joshi; D. Kieda; G. J. Kunde; A. Lara; W. H. Lee; H. León Vargas; J. T. Linnemann; A. L. Longinotti; G. Luis-Raya; K. Malone; O. Martinez; J. Martínez-Castro; J. A. Matthews; P. Miranda-Romagnoli; J. A. Morales-Soto; E. Moreno; M. Mostafá; A. Nayerhoda; L. Nellen; M. Newbold; R. Noriega-Papaqui; N. Omodei; E. G. Pérez-Pérez; C. D. Rho; D. Rosa-González; H. Salazar; F. Salesa Greus; A. Sandoval; J. Serna-Franco; A. J. Smith; R. W. Springer; K. Tollefson; I. Torres; R. Torres-Escobedo; F. Ureña-Mena; L. Villaseñor; X. Wang; E. Willox; H. Zhou; C. De León; J. D. Álvarez; G. B. Yodh; A. Zepeda

doi:10.1103/PhysRevD.105.063021

Cosmic ray spectrum of protons plus helium nuclei between 6 and 158 TeV from HAWC data

A. Albert
, R. Alfaro
, C. Alvarez
, J. R. Angeles Camacho
, J. C. Arteaga-Velázquez
, K. P. Arunbabu
, D. Avila Rojas
, H. A. Ayala Solares
, E. Belmont-Moreno
, C. Brisbois
, K. S. Caballero-Mora
, T. Capistrán
, A. Carramiñana
, S. Casanova
, U. Cotti
, J. Cotzomi
, E. De La Fuente
, R. Diaz Hernandez
, M. A. Duvernois
, M. Durocher

J. C. Díaz-Vélez, C. Espinoza, N. Fraija, J. A. García-González, F. Garfias, M. M. González, J. A. Goodman, J. P. Harding, B. Hona, D. Huang, F. Hueyotl-Zahuantitla, P. Hüntemeyer, A. Iriarte, V. Joshi, D. Kieda, G. J. Kunde, A. Lara, W. H. Lee, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, K. Malone, O. Martinez, J. Martínez-Castro, J. A. Matthews, P. Miranda-Romagnoli, J. A. Morales-Soto, E. Moreno, M. Mostafá, A. Nayerhoda, L. Nellen, M. Newbold, R. Noriega-Papaqui, N. Omodei, E. G. Pérez-Pérez, C. D. Rho, D. Rosa-González, H. Salazar, F. Salesa Greus, A. Sandoval, J. Serna-Franco, A. J. Smith, R. W. Springer, K. Tollefson, I. Torres, R. Torres-Escobedo, F. Ureña-Mena, L. Villaseñor, X. Wang, E. Willox, H. Zhou, C. De León, J. D. Álvarez, G. B. Yodh, A. Zepeda

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Abstract

A measurement with high statistics of the differential energy spectrum of light elements in cosmic rays, in particular, of primary H plus He nuclei, is reported. The spectrum is presented in the energy range from 6 to 158 TeV per nucleus. Data was collected with the High Altitude Water Cherenkov (HAWC) Observatory between June 2015 and June 2019. The analysis was based on a Bayesian unfolding procedure, which was applied on a subsample of vertical HAWC data that was enriched to 82% of events induced by light nuclei. To achieve the mass separation, a cut on the lateral age of air shower data was set guided by predictions of CORSIKA/QGSJET-II-04 simulations. The measured spectrum is consistent with a broken power-law spectrum and shows a kneelike feature at around E=24.0-3.1+3.6 TeV, with a spectral index γ=-2.51±0.02 before the break and with γ=-2.83±0.02 above it. The feature has a statistical significance of 4.1σ. Within systematic uncertainties, the significance of the spectral break is 0.8σ.

Original language	English (US)
Article number	063021
Journal	Physical Review D
Volume	105
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevD.105.063021
State	Published - Mar 15 2022

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevD.105.063021

Cite this

Albert, A., Alfaro, R., Alvarez, C., Angeles Camacho, J. R., Arteaga-Velázquez, J. C., Arunbabu, K. P., Avila Rojas, D., Ayala Solares, H. A., Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Cotti, U., Cotzomi, J., De La Fuente, E., Diaz Hernandez, R., Duvernois, M. A., ... Zepeda, A. (2022). Cosmic ray spectrum of protons plus helium nuclei between 6 and 158 TeV from HAWC data. Physical Review D, 105(6), Article 063021. https://doi.org/10.1103/PhysRevD.105.063021

@article{a463ac4103db43ab99bc064119a2b916,

title = "Cosmic ray spectrum of protons plus helium nuclei between 6 and 158 TeV from HAWC data",

abstract = "A measurement with high statistics of the differential energy spectrum of light elements in cosmic rays, in particular, of primary H plus He nuclei, is reported. The spectrum is presented in the energy range from 6 to 158 TeV per nucleus. Data was collected with the High Altitude Water Cherenkov (HAWC) Observatory between June 2015 and June 2019. The analysis was based on a Bayesian unfolding procedure, which was applied on a subsample of vertical HAWC data that was enriched to 82\% of events induced by light nuclei. To achieve the mass separation, a cut on the lateral age of air shower data was set guided by predictions of CORSIKA/QGSJET-II-04 simulations. The measured spectrum is consistent with a broken power-law spectrum and shows a kneelike feature at around E=24.0-3.1+3.6 TeV, with a spectral index γ=-2.51±0.02 before the break and with γ=-2.83±0.02 above it. The feature has a statistical significance of 4.1σ. Within systematic uncertainties, the significance of the spectral break is 0.8σ.",

author = "A. Albert and R. Alfaro and C. Alvarez and \{Angeles Camacho\}, \{J. R.\} and Arteaga-Vel{\'a}zquez, \{J. C.\} and Arunbabu, \{K. P.\} and \{Avila Rojas\}, D. and \{Ayala Solares\}, \{H. A.\} and E. Belmont-Moreno and C. Brisbois and Caballero-Mora, \{K. S.\} and T. Capistr{\'a}n and A. Carrami{\~n}ana and S. Casanova and U. Cotti and J. Cotzomi and \{De La Fuente\}, E. and \{Diaz Hernandez\}, R. and Duvernois, \{M. A.\} and M. Durocher and D{\'i}az-V{\'e}lez, \{J. C.\} and C. Espinoza and N. Fraija and Garc{\'i}a-Gonz{\'a}lez, \{J. A.\} and F. Garfias and Gonz{\'a}lez, \{M. M.\} and Goodman, \{J. A.\} and Harding, \{J. P.\} and B. Hona and D. Huang and F. Hueyotl-Zahuantitla and P. H{\"u}ntemeyer and A. Iriarte and V. Joshi and D. Kieda and Kunde, \{G. J.\} and A. Lara and Lee, \{W. H.\} and \{Le{\'o}n Vargas\}, H. and Linnemann, \{J. T.\} and Longinotti, \{A. L.\} and G. Luis-Raya and K. Malone and O. Martinez and J. Mart{\'i}nez-Castro and Matthews, \{J. A.\} and P. Miranda-Romagnoli and Morales-Soto, \{J. A.\} and E. Moreno and M. Mostaf{\'a} and A. Nayerhoda and L. Nellen and M. Newbold and R. Noriega-Papaqui and N. Omodei and P{\'e}rez-P{\'e}rez, \{E. G.\} and Rho, \{C. D.\} and D. Rosa-Gonz{\'a}lez and H. Salazar and \{Salesa Greus\}, F. and A. Sandoval and J. Serna-Franco and Smith, \{A. J.\} and Springer, \{R. W.\} and K. Tollefson and I. Torres and R. Torres-Escobedo and F. Ure{\~n}a-Mena and L. Villase{\~n}or and X. Wang and E. Willox and H. Zhou and \{De Le{\'o}n\}, C. and {\'A}lvarez, \{J. D.\} and Yodh, \{G. B.\} and A. Zepeda",

note = "Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

year = "2022",

month = mar,

day = "15",

doi = "10.1103/PhysRevD.105.063021",

language = "English (US)",

volume = "105",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "6",

}

Albert, A, Alfaro, R, Alvarez, C, Angeles Camacho, JR, Arteaga-Velázquez, JC, Arunbabu, KP, Avila Rojas, D, Ayala Solares, HA, Belmont-Moreno, E, Brisbois, C, Caballero-Mora, KS, Capistrán, T, Carramiñana, A, Casanova, S, Cotti, U, Cotzomi, J, De La Fuente, E, Diaz Hernandez, R, Duvernois, MA, Durocher, M, Díaz-Vélez, JC, Espinoza, C, Fraija, N, García-González, JA, Garfias, F, González, MM, Goodman, JA, Harding, JP, Hona, B, Huang, D, Hueyotl-Zahuantitla, F, Hüntemeyer, P, Iriarte, A, Joshi, V, Kieda, D, Kunde, GJ, Lara, A, Lee, WH, León Vargas, H, Linnemann, JT, Longinotti, AL, Luis-Raya, G, Malone, K, Martinez, O, Martínez-Castro, J, Matthews, JA, Miranda-Romagnoli, P, Morales-Soto, JA, Moreno, E, Mostafá, M, Nayerhoda, A, Nellen, L, Newbold, M, Noriega-Papaqui, R, Omodei, N, Pérez-Pérez, EG, Rho, CD, Rosa-González, D, Salazar, H, Salesa Greus, F, Sandoval, A, Serna-Franco, J, Smith, AJ, Springer, RW, Tollefson, K, Torres, I, Torres-Escobedo, R, Ureña-Mena, F, Villaseñor, L, Wang, X, Willox, E, Zhou, H, De León, C, Álvarez, JD, Yodh, GB & Zepeda, A 2022, 'Cosmic ray spectrum of protons plus helium nuclei between 6 and 158 TeV from HAWC data', Physical Review D, vol. 105, no. 6, 063021. https://doi.org/10.1103/PhysRevD.105.063021

TY - JOUR

T1 - Cosmic ray spectrum of protons plus helium nuclei between 6 and 158 TeV from HAWC data

AU - Albert, A.

AU - Alfaro, R.

AU - Alvarez, C.

AU - Angeles Camacho, J. R.

AU - Arteaga-Velázquez, J. C.

AU - Arunbabu, K. P.

AU - Avila Rojas, D.

AU - Ayala Solares, H. A.

AU - Belmont-Moreno, E.

AU - Brisbois, C.

AU - Caballero-Mora, K. S.

AU - Capistrán, T.

AU - Carramiñana, A.

AU - Casanova, S.

AU - Cotti, U.

AU - Cotzomi, J.

AU - De La Fuente, E.

AU - Diaz Hernandez, R.

AU - Duvernois, M. A.

AU - Durocher, M.

AU - Díaz-Vélez, J. C.

AU - Espinoza, C.

AU - Fraija, N.

AU - García-González, J. A.

AU - Garfias, F.

AU - González, M. M.

AU - Goodman, J. A.

AU - Harding, J. P.

AU - Hona, B.

AU - Huang, D.

AU - Hueyotl-Zahuantitla, F.

AU - Hüntemeyer, P.

AU - Iriarte, A.

AU - Joshi, V.

AU - Kieda, D.

AU - Kunde, G. J.

AU - Lara, A.

AU - Lee, W. H.

AU - León Vargas, H.

AU - Linnemann, J. T.

AU - Longinotti, A. L.

AU - Luis-Raya, G.

AU - Malone, K.

AU - Martinez, O.

AU - Martínez-Castro, J.

AU - Matthews, J. A.

AU - Miranda-Romagnoli, P.

AU - Morales-Soto, J. A.

AU - Moreno, E.

AU - Mostafá, M.

AU - Nayerhoda, A.

AU - Nellen, L.

AU - Newbold, M.

AU - Noriega-Papaqui, R.

AU - Omodei, N.

AU - Pérez-Pérez, E. G.

AU - Rho, C. D.

AU - Rosa-González, D.

AU - Salazar, H.

AU - Salesa Greus, F.

AU - Sandoval, A.

AU - Serna-Franco, J.

AU - Smith, A. J.

AU - Springer, R. W.

AU - Tollefson, K.

AU - Torres, I.

AU - Torres-Escobedo, R.

AU - Ureña-Mena, F.

AU - Villaseñor, L.

AU - Wang, X.

AU - Willox, E.

AU - Zhou, H.

AU - De León, C.

AU - Álvarez, J. D.

AU - Yodh, G. B.

AU - Zepeda, A.

PY - 2022/3/15

Y1 - 2022/3/15

N2 - A measurement with high statistics of the differential energy spectrum of light elements in cosmic rays, in particular, of primary H plus He nuclei, is reported. The spectrum is presented in the energy range from 6 to 158 TeV per nucleus. Data was collected with the High Altitude Water Cherenkov (HAWC) Observatory between June 2015 and June 2019. The analysis was based on a Bayesian unfolding procedure, which was applied on a subsample of vertical HAWC data that was enriched to 82% of events induced by light nuclei. To achieve the mass separation, a cut on the lateral age of air shower data was set guided by predictions of CORSIKA/QGSJET-II-04 simulations. The measured spectrum is consistent with a broken power-law spectrum and shows a kneelike feature at around E=24.0-3.1+3.6 TeV, with a spectral index γ=-2.51±0.02 before the break and with γ=-2.83±0.02 above it. The feature has a statistical significance of 4.1σ. Within systematic uncertainties, the significance of the spectral break is 0.8σ.

AB - A measurement with high statistics of the differential energy spectrum of light elements in cosmic rays, in particular, of primary H plus He nuclei, is reported. The spectrum is presented in the energy range from 6 to 158 TeV per nucleus. Data was collected with the High Altitude Water Cherenkov (HAWC) Observatory between June 2015 and June 2019. The analysis was based on a Bayesian unfolding procedure, which was applied on a subsample of vertical HAWC data that was enriched to 82% of events induced by light nuclei. To achieve the mass separation, a cut on the lateral age of air shower data was set guided by predictions of CORSIKA/QGSJET-II-04 simulations. The measured spectrum is consistent with a broken power-law spectrum and shows a kneelike feature at around E=24.0-3.1+3.6 TeV, with a spectral index γ=-2.51±0.02 before the break and with γ=-2.83±0.02 above it. The feature has a statistical significance of 4.1σ. Within systematic uncertainties, the significance of the spectral break is 0.8σ.

UR - https://www.scopus.com/pages/publications/85128651800

UR - https://www.scopus.com/pages/publications/85128651800#tab=citedBy

U2 - 10.1103/PhysRevD.105.063021

DO - 10.1103/PhysRevD.105.063021

M3 - Article

AN - SCOPUS:85128651800

SN - 2470-0010

VL - 105

JO - Physical Review D

JF - Physical Review D

IS - 6

M1 - 063021

ER -

Cosmic ray spectrum of protons plus helium nuclei between 6 and 158 TeV from HAWC data

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