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)
Publication Type: Journal article
Publication year: 2022
Book Volume: 105
Article Number: 063021
Journal Issue: 6
DOI: 10.1103/PhysRevD.105.063021
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.
APA:
Albert, A., Alfaro, R., Alvarez, C., Angeles Camacho, J.R., Arteaga-Velázquez, J.C., Arunbabu, K.P.,... Zepeda, A. (2022). Cosmic ray spectrum of protons plus helium nuclei between 6 and 158 TeV from HAWC data. Physical Review D, 105(6). https://doi.org/10.1103/PhysRevD.105.063021
MLA:
Albert, A., et al. "Cosmic ray spectrum of protons plus helium nuclei between 6 and 158 TeV from HAWC data." Physical Review D 105.6 (2022).
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