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Characterization of the background for a neutrino search with the HAWC observatory

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arxiv 2108.07767 v2 pith:ZHO2KLWM submitted 2021-08-17 hep-ex astro-ph.IM

Characterization of the background for a neutrino search with the HAWC observatory

HAWC Collaboration: A. Albert , R. Alfaro , C. Alvarez , J. R. Angeles Camacho , J. C. Arteaga-Vel\'azquez , K. P. Arunbabu , E. Belmont-Moreno , K. S. Caballero-Mora
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T. Capistr\'an A. Carrami\~nana S. Casanova U. Cotti J. Cotzomi S. Couti\~no de Le\'on E. De la Fuente R. Diaz Hernandez M. A. DuVernois M. Durocher C. Espinoza K. L. Fan N. Fraija D. Garcia J. A. Garc\'ia-Gonz\'alez F. Garfias M. M. Gonz\'alez J. A. Goodman D. Huang F. Hueyotl-Zahuantitla P. H\"untemeyer A. Iriarte A. Jardin-Blicq D. Kieda A. Lara W. H. Lee H. Le\'on Vargas A. L. Longinotti G. Luis-Raya K. Malone J. Mart\'inez-Castro J. A. Matthews P. Miranda-Romagnoli J. A. Morales-Soto E. Moreno A. Nayerhoda L. Nellen R. Noriega-Papaqui N. Omodei A. Peisker E. G. P\'erez-P\'erez C. D. Rho D. Rosa-Gonz\'alez A. Sandoval J. Serna-Franco R. W. Springer K. Tollefson I. Torres R. Torres-Escobedo F. Ure\~na-Mena L. Villase\~nor H. Zhou C. de Le\'on
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classification hep-ex astro-ph.IM
keywords backgroundhawcsearchchargeddetectionhorizontalleptonsneutrino-induced
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The close location of the HAWC observatory to the largest volcano in Mexico allows to perform a search for neutrino-induced horizontal muon and tau charged leptons. The section of the volcano located at the horizon reaches values of slant depth larger than 8 km of rock, making it an excellent shield for the cosmic ray horizontal background. We report the search method and background suppression technique developed for the detection of Earth-skimming neutrinos with HAWC, as well as a model that describes the remaining background produced by scattered muons. We show that by increasing the detection energy threshold we could use HAWC to search for neutrino-induced charged leptons.

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