HAWC measurements of the energy spectra of cosmic ray protons, helium and heavy nuclei in the TeV range

Hawc,; Abeysekara, Anushka Udara; Albert, A.; Alfaro, R.; Álvarez, C.; Romero, Juan de Dios Álvarez; Camacho, J.R.; Velázquez, Juan Carlos Arteaga; Kollamparambil, Arun Babu; Rojas, Daniel Omar Avila; Solares, Hugo Alberto Ayala; Babu, Rishi; Baghmanyan, Vardan; Barber, Ahron S.; González, J. Becerra; Belmont‐Moreno, E.; BenZvi, S.; Berley, D.; Brisbois, C.; Mora, Karen S. Caballero; Rojas, Tomás Capistrán; Carramiñana, A.; Casanova, S.; Chaparro-Amaro, Oscar; Cotti, U.; Cotzomi, J.; León, S. Coutińo de; Fuente, Eduardo de la; León, Cederik León de; Diaz, Lorenzo; Hernández, R. Díaz; Díaz-Vélez, J. C.; Dingus, B. L.; Durocher, Mora; DuVernois, Michael; Ellsworth, R. W.; Engel, Kristi; Hernández, María Catalina Espinoza; Fan, Jason; Fang, Ke; Alonso, M. Fernández; Fick, B.; Fleischhack, Henrike; Flores, Jorge L.; Fraija, N.; Aguilar, Diego Garcia; García-González, J. A.; García–Luna, José Luis; García–Torales, Guillermo; Garfias, F.; Giacinti, Gwenael; Goksu, Hazal; González, M. M.; Goodman, J. A.; Harding, J. Patrick; Cadena, Sergio Hernández; Herzog, Ian; Hinton, Jim; Hona, B.; Huang, Dezhi; Hueyotl-Zahuantitla, Filiberto; Hui, C. M.; Humensky, Brian; Hüntemeyer, P.; Iriarte, A.; Jardin-Blicq, A.; Jhee, Hannah; Joshi, Vikas; Kieda, D.; Kunde, G. J.; Kunwar, S.; Lara, Alejandro; Lee, Jason; Lee, William H.; Lennarz, D.; Vargas, H. León; Linnemann, J. T.; Longinotti, A. L.; López-Coto, R.; Luis-Raya, G.; Lundeen, Joe; Malone, K.; Marandon, V.; Martı́nez, O.; Castellanos, Israel Martinez; Huerta, Humberto Martínez; Martínez-Castro, J.; Matthews, J. N.; McEnery, J.; Miranda-Romagnoli, P.; Soto, Jorge Antonio Morales; Barbosa, Eduardo Moreno; Mostafá, M.; Nayerhoda, A.; Nellen, Lukas; Newbold, M.; Nisa, Mehr; Noriega‐Papaqui, R.; Olivera-Nieto, Laura; Omodei, N.; Peisker, A.; Araujo, Yunior Pérez; Pérez, Eucario Gonzalo Pérez; Rho, Chang Dong; Rivière, C.; Rosa-González, D.; Ruiz-Velasco, E.; Ryan, James; Salazar, H.; Greus, F. Salesa; Sandoval, A.; Schneider, M.; Schoorlemmer, H.; Serna-Franco, José; Sinnis, G.; Smith, A. J.; Springer, R. W.; Surajbali, P.; Taboada, I.; Tanner, Meghan; Tollefson, K.; Torres, I.; Escobedo, Ramiro Torres; Turner, Rhiannon; Ureña-Mena, Fernando; Villaseñor, L.; Wang, Xiaojie; Watson, I. J.; Weisgarber, T.; Werner, F.; Willox, Elijah; Wood, J.; Yodh, G.; Zepeda, A.; Zhou, H.

doi:10.22323/1.395.0374

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…For the resolved mass groups, the fluxes show features such as softenings whose energy positions increase with the primary mass. We quote from the proceeding [55]: "The observation of softenings in the spectra of H and He with HAWC, close to (14.06 ± 0.02 (stat) +2. Another measurement, proclaimed as a bridge between direct and indirect measurements, was presented by the GRAPES-3 collaboration.…”

Section: Pos(icrc2021)043mentioning

confidence: 87%

See 1 more Smart Citation

Cosmic Ray Indirect Rapporteur Report (37th ICRC )

Abu‐Zayyad¹

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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This report summarizes the physics results presented as part of the cosmic-ray indirect (CRI) session of the 37 th ICRC conference. Updated measurements on cosmic-ray energy spectrum, mass composition, and arrival direction distributions were presented by several collaborations, spanning the energy range of a few TeV up to the highest observed energies. We select some of the results which were highlighted by the respective discussion leaders or which presented new results at this conference. Results on atmospheric phenomena, including TGFs and thunderstorms are also presented. We see a few interesting trends in the presented data. Among these are, the increased use of IACT's to study cosmic-rays among experiments primarily intended for gamma-ray measurements. Another, is the continued development of radio detection of air showers. Multi-component detectors are becoming the preferred detection mode, as the knowledge of how to integrate the different information about an air shower collected by the different detector components improves. The main physics questions about the origins of cosmic rays, both galactic and extra-galactic, remain open. Increased statistics and improved analyses allow for refining and better constraining theoretical models, but no definitive answers can be claimed thus far. Looking forward, the field is moving at a rapid pace; Several detectors upgrades are underway, data is continually coming in and analyzed, old data being made public for a wider audience and a new generation of scientists to examine, with new tools and approaches that will hopefully result in new insights to help solve the open questions on cosmic-rays.

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Section: Pos(icrc2021)043mentioning

confidence: 87%

“…Pushing beyond 1 PeV in energy, the HAWC collaboration presented results on the all particle cosmic-ray energy spectrum [54], and those of three elemental mass groups, namely protons, Helium, and heavy nuclei [55]. Results are shown in Figure 2.…”

Section: Cr Energy Spectrum and Mass Compositionmentioning

confidence: 99%

Cosmic Ray Indirect Rapporteur Report (37th ICRC )

Abu‐Zayyad¹

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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

Albert¹,

Alfaro²,

Álvarez³

et al. 2022

Phys. Rev. D

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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 TeV 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 knee-like feature at around E = 24.0 +3.6 −3.1 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 4.1 σ. Within systematic uncertainties, the significance of the spectral break is 0.8 σ.

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Measurement of the cosmic p+He energy spectrum from 50 GeV to 0.5 PeV with the DAMPE space mission

Alemanno,

Altomare,

et al. 2024

Phys. Rev. D

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HAWC measurements of the energy spectra of cosmic ray protons, helium and heavy nuclei in the TeV range

Cited by 3 publications

References 9 publications

Cosmic Ray Indirect Rapporteur Report (37th ICRC )

Cosmic Ray Indirect Rapporteur Report (37th ICRC )

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

Measurement of the cosmic p+He energy spectrum from 50 GeV to 0.5 PeV with the DAMPE space mission

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