BEGIN:VCALENDAR VERSION:2.0 PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN BEGIN:VEVENT SUMMARY:Exploring the electromagnetic shower profile to enhance the Pierre Auger Observatory physics capabilities DTSTART:20251127T090000Z DTEND:20251127T110000Z DTSTAMP:20260914T203915Z UID:13e8d42d-5a5d-4b55-931a-8480b73d4be3 SEQUENCE:1 CREATED:20251124T090328Z DESCRIPTION: This work investigates two complementary strategies to enhanc e the physics capabilities of the Pierre Auger Observatory. The first exam ines the identification of vertical neutrino-induced air showers using the electromagnetic and muonic surface signals\, Sem and Sμ. Simulations of proton and neutrino primaries using CORSIKA and the Auger Offline framewor k indicate that Xmax should not be directly included\, as its information is largely encoded in Sem and Sμ. Additionally\, it was shown that muon n eutrino-induced showers can also be detected using the above Sem - Sμ met hodology\, offering a meaningful improvement in differential neutrino flux limits. In the second part of this thesis\, it is investigated the techni que of radio interferometry as a method for reconstructing the electromagn etic longitudinal profile of extensive air showers. Using ZHAireS simulati ons\, it was shown that there is a strong link between the EM profile shap e and the one reconstructed from radio simulations. Significant difference s in the longitudinal shape parameters\, R e L\, were observed between ave raged showers of different primary compositions\, demonstrating the techni que’s potential for primary composition studies at full duty-cycle.These results highlight the complementary impact of surface signal analysis and radio interferometry\, while muon neutrinos can enhance neutrino detectio n limits\, RIT provides an independent\, high-precision method to access s hower development\, offering a promising avenue for improving ultra-high-e nergy cosmic-ray and neutrino observations. LAST-MODIFIED:20251124T090328Z LOCATION:Online URL:http://df.vps.tecnico.ulisboa.pt/en/events/exploring-the-electromagnet ic-shower-profile-to-enhance-the-pierre-auger-observatory-physics-capabili ties/ X-ALT-DESC;FMTTYPE=text/html:

This work investig ates two complementary strategies to enhance the physics capabilities of t he Pierre Auger Observatory. The first examines the identification of vert ical neutrino-induced air showers using the electromagnetic and muonic sur face signals\, Sem and Sμ. Simulations of proton and neutri no primaries using CORSIKA and the Auger Offline framework indicate that < i>Xmax should not be directly included\, as its information is largely encoded in Sem and Sμ. Additionally\, it was shown that mu on neutrino-induced showers can also be detected using the above Se m - Sμ methodology\, offering a meaningful improvement in differen tial neutrino flux limits.

In the second part of this thesis\, it is investigated the technique of radio int erferometry as a method for reconstructing the electromagnetic longitudina l profile of extensive air showers. Using ZHAireS simulations\, it was sho wn that there is a strong link between the EM profile shape and the one re constructed from radio simulations. Significant differences in the longitu dinal shape parameters\, R e L\, were observed between avera ged showers of different primary compositions\, demonstrating the techniqu e’s potential for primary composition studies at full duty-cycle.

These results highlight the complementary impact of surface signal analysis and radio interferometry\, while muon n eutrinos can enhance neutrino detection limits\, RIT provides an independe nt\, high-precision method to access shower development\, offering a promi sing avenue for improving ultra-high-energy cosmic-ray and neutrino observ ations.

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