12-20 July 2017
Asia/Seoul timezone
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BEXCO - Room F(201/202/203/204)

[CRI315] Search for signals of New Physics in Extensive Air Showers induced by Ultra High Energy Cosmic-Rays


  • Cederik DE LEÓN

Primary authors

  • Umberto COTTI (Universidad Michoacana de San Nicolás de Hidalgo)



The use of Cosmic-Rays (CR) as a benchmark for new physics (beyond the standard model) search, is an approach based on the fact that, historically, the energy reached by the particle colliders has been and continues to be smaller than the energy the CR can achieve. Nevertheless the energies achieved by the particle colliders nowadays is getting closer to those the CR of the highest energies have, which has caused that possible effects of new physics is now seeking mainly in CR of ultra high energy (UHECR), which have an extremely low flux, resulting in a poor statistic and could make unattractive or feasible this way. A classically used method in the study of the search on new physics it is to validate the way that an specific model, beyond the standard model (SM), produce effects with a defined, different and also detectable phenomenology. The challenge in this approach lies in the complexity of the parametrization both phenomenology of an specific model and the interactions of ultra high energy particles in the codes that simulates the development of the Extensive Air Shower (EAS). To simplify the methodology described above, and particularly to unlink the research from the need of a particular model phenomenology, we present an approach in the way the exotic-like events are parameterized in function of a few variables: the energy of the primary (usually a proton), the depth of the first interaction, the amount of energy with respect to the total energy of the primary that an exotic heavy particle could carry and at last the possible deviation this exotic particle could have with respect to the primary-shower axis. Being the background noise, for the detection of the mentioned event, the produced by the heavy Hadrons from the SM which, when generated, could be indistinguishable from a signal produced by an exotic particle. This study has been focused on the analysis on the lateral shower profile, performing variation in the parameters previously mentioned. It has been sought to find which should be the minimum parameter set under which could be observed an effect produced by the presence of an exotic particle created during the EAS development. The results shows that starting from a fraction of the 30% from the total energy of the primary and with a deviation as small as 0.4 degrees with respect to the primary-shower axis, is possible to observe a lateral profile with a clear evidence of the presence of a heavy particle into the EAS development. This work demonstrates that through the study of the lateral profile of the energy distribution from an EAS, it is possible to observe the effect produced by an exotic particle that carries a relatively small fraction of the energy from the primary, and have a deviation of a few tenths of degree with respect to the primary-shower axis.