Abstract
The volcanoes surrounding the HAWC observatory provide varying material depths from open sky to over 15 km of rock for nearly horizontal muon trajectories. The muon integral intensity as a function of material depth may be determined from the rate of muons as a function of arrival direction near the horizon. A Hough transform algorithm is used to identify nearly-horizontal muons traversing the HAWC observatory by finding a line in the 3d point cloud of PMT hits (xi,yi, and cti). The arrival direction of the muon can be estimated from this line. Background Extensive Air Shower (EAS) fragments are identified by the presence of a lateral extension of PMT hits in a plane normal to the muon candidate trajectory. A geometry-based simulation has been developed to improve and estimate arrival direction reconstruction resolution and effective area. A description of the reconstruction techniques and estimates of detector resolution, backgrounds, and effective area as a function of arrival direction, will be provided.
Recommended Citation
A. S. Barber and A. S. Barber and D. B. Kieda and D. B. Kieda and R. Wayne Springer and A. U. Abeysekara and A. Albert and R. Alfaro and C. Alvarez and J. D. Álvarez and J. R. Angeles Camacho and J. C. Arteaga-Velázquez and K. P. Arunbabu and D. Avila Rojas and H. A. Ayala Solares and R. Babu and V. Baghmanyan and J. Becerra Gonzalez and E. Belmont-Moreno and S. Y. BenZvi and D. Berley and C. Brisbois and K. S. Caballero-Mora and T. Capistran and A. Carraminana and S. Casanova and O. Chaparro-Amaro and U. Cotti and J. Cotzomi and S. Coutino de Leon and E. De la Fuente and C. de Leon and L. Diaz-Cruz and R. Diaz Hernandez and J. C. Diaz-Velez and B. L. Dingus and M. Durocher and M. A. DuVernois and R. W. Ellsworth and K. Engel and C. Espinoza and K. L. Fan and K. Fang and M. Fernandez Alonso and B. Fick and H. Fleischhack and J. L. Flores and N. I. Fraija and D. Garcia and J. A. Garcia-GGonzalez and J. L. Garcia-Luna and G. Garcia-Torales and F. Garfias and G. Giacinti and H. Goksu and M. M. Gonzalez and J. A. Goodman and J. P. Harding and S. Hernandez and I. Herzog and J. Hinton and B. Hona and D. Huang and F. Hueyotl-Zahuantitla and C. M. Hui and B. Humensky and P. Huntemeyer and A. Iriarte and J. Jardin-Blicq and H. Jhee and V. Joshi and D. Kieda and G. J. Kunde and S. Kunwar and A. Lara and J. Lee and W. H. Lee and D. Lennarz and H. Leon Vargas and J. Linnemann and A. L. Longinotti and R. Lopez-Coto and G. Luis-Raya and J. Lundeen and K. Malone and V. Marandon and O. Martinez and I. Martinez-Castellanos and H. Martinez-Huerta and J. Martinez-Castro and J. A. Matthews and J. McEnery and P. Miranda-Romagnoli and J. A. Morales-Soto and E. Moreno and M. Mostafa and A. Nayerhoda and L. Nellen and M. Newbold and M. U. Nisa and R. Noriega-Papaqui and L. Olivera-Nieto and N. Omodei and A. Peisker and Y. Perez Araujo and E. G. Perez-Perez and C. D. Rho and C. Riviere and D. Rosa-Gonzalez and E. Ruiz-Velasco and J. Ryan and H. Salazar and F. Salesa Greus and A. Sandoval and M. Schneider and H. Schoorlemmer and J. Serna-Franco and G. Sinnis and A. J. Smith and R. W. Springer and P. Surajbali and I. Taboada and M. Tanner and K. Tollefson and I. Torres and R. Torres-Escobedo and R. Turner and F. Urena-Mena and L. Villasenor and X. Wang and I. J. Watson and T. Weigarber and F. Werner and E. Willox and J. Wood and G. B. Yodh and A. Zepeda and H. Zhou, "Reconstruction Of Nearly Horizontal Muons In The HAWC Observatory," Proceedings of Science, vol. 395, article no. 254, Sissa Medialab Srl, Mar 2022.
The definitive version is available at https://doi.org/10.22323/1.395.0254
Department(s)
Physics
Publication Status
Open Access
International Standard Serial Number (ISSN)
1824-8039
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Sissa Medialab Srl, All rights reserved.
Publication Date
18 Mar 2022
Comments
National Science Foundation, Grant PRODEP-SEP UDG-CA-499