Constraints on BSM particles from the absence of upward-going air showers in the Pierre Auger Observatory

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00635932" target="_blank" >RIV/68378271:_____/24:00635932 - isvavai.cz</a>
Result on the web
<a href="https://pos.sissa.it/444/1095/pdf" target="_blank" >https://pos.sissa.it/444/1095/pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.22323/1.444.1095" target="_blank" >10.22323/1.444.1095</a>

Result language
angličtina
Original language name
Constraints on BSM particles from the absence of upward-going air showers in the Pierre Auger Observatory
Original language description
The Fluorescence Detector (FD) of the Pierre Auger Observatory has a large exposure to search for upward-going showers. Constraints have been recently obtained by using 14 years of FD data searching for upward-going showers in the zenith angle range [110◦,180◦]. In this work, we translate these bounds to upper limits of a possible flux of ultra high energy tau-leptons escaping from the Earth into the atmosphere. Such a mechanism could explain the observation of 'anomalous pulses' made by ANITA, that indicated the existence of upward-going air showers with energies above 1017 eV. As tau neutrinos would be absorbed within the Earth at the deduced angles and energies, a flux of upward-going taus could only be resulted from an unknown type of ultra high energy Beyond Standard Model particle penetrating the Earth with little attenuation, and then creating tau-leptons through interactions within a maximum depth of about 50 km before exiting. We test classes of such models in a generic way and determine upper flux limits of ultra high energy BSM particles as a function of their unknown cross section with matter.n
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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