Gamma/Hadron Separation with the HAWC Observatory
Abstract
The High Altitude Water Cherenkov (HAWC) gamma-ray observatory observes atmospheric showers produced by incident gamma rays and cosmic rays with energy from 300 GeV to more than 100 TeV. A crucial phase in analyzing gamma-ray sources using ground-based gamma-ray detectors like HAWC is to identify the showers produced by gamma rays or hadrons. The HAWC observatory records roughly 25,000 events per second, with hadrons representing the vast majority () of these events. The standard gamma/hadron separation technique in HAWC uses a simple rectangular cut involving only two parameters. This work describes the implementation of more sophisticated gamma/hadron separation techniques, via machine learning methods (boosted decision trees and neural networks), and summarizes the resulting improvements in gamma/hadron separation obtained in HAWC.
Cite
@article{arxiv.2205.12188,
title = {Gamma/Hadron Separation with the HAWC Observatory},
author = {R. Alfaro and C. Alvarez and J. D. Álvarez and J. R. Angeles Camacho and J. C. Arteaga-Velázquez and D. Avila Rojas and H. A. Ayala Solares and R. Babu and E. Belmont-Moreno and C. Brisbois and K. S. Caballero-Mora and T. Capistrán and A. Carramiñana and S. Casanova and O. Chaparro-Amaro and U. Cotti and J. Cotzomi and S. Coutiño de León and E. De la Fuente and C. de León and R. Diaz Hernandez and B. L. Dingus and M. A. DuVernois and M. Durocher and J. C. Díaz-Vélez and R. W. Ellsworth and K. Engel and C. Espinoza and K. L. Fan and M. Fernández Alonso and N. Fraija and D. Garcia and J. A. García-González and F. Garfias and M. M. González and J. A. Goodman and J. P. Harding and S. Hernandez and B. Hona and D. Huang and F. Hueyotl-Zahuantitla and P. Hüntemeyer and A. Iriarte and A. Jardin-Blicq and V. Joshi and S. Kaufmann and G. J. Kundem A. Lara and W. H. Lee and J. Lee and H. León Vargas and J. T. Linnemann and G. Luis-Raya and J. Lundeen and K. Malone and V. Marandon and O. Martinez and J. Martínez-Castro and J. A. Matthews and P. Miranda-Romagnoli and J. A. Morales-Soto and A. Nayerhoda and L. Nellen and M. U. Nisa and R. Noriega-Papaqui and L. Olivera-Nieto and N. Omodei and A. Peisker and Y. Pérez Araujo and E. G. Pérez-Pérez and C. D. Rho and D. Rosa-González and E. Ruiz-Velasco and H. Salazar and F. Salesa Greus and A. Sandoval and P. M. Saz Parkinson and J. Serna-Franco and A. J. Smith and R. W. Springer and O. Tibolla and K. Tollefson and I. Torres and R. Torres-Escobedo and R. Turner and F. Ureña-Mena and L. Villaseñor and X. Wang and I. J. Watson and F. Werner and E. Willox and J. Wood and A. Zepeda and H. Zhou},
journal= {arXiv preprint arXiv:2205.12188},
year = {2022}
}
Comments
35 pages, 9 figures, published in Nuclear Instruments and Methods in Physics Research Section A