Student seminars

#StudentSeminar: Searching for LLP and background estimation

by Mariia Didenko (IFIC Valencia)

1001-Primera-1-1-1 - Paterna. Seminario (Universe)

1001-Primera-1-1-1 - Paterna. Seminario



Neutral Long-lived particles (LLPs) are challenging to detect directly on the collider due to their long lifetimes and limited geometric acceptance of modern detectors. New experiments like MATHUSLA aim to overcome these challenges by exploiting the high-energy potential of the LHC and proposing detectors shielded from QCD background. MATHUSLA, with its large size and proximity to the Interaction Point, seeks to explore physics beyond the Standard Model (BSM) and uncover hidden sector physics. By detecting LLPs with lifetimes up to 0.1 sec, MATHUSLA bridges collider physics and cosmology, potentially revealing particles linked to early universe phenomena. However, understanding background sources are necessary. One of the possible background is KL decays from secondary protons of cosmic. This work focuses on estimation the contribution of KL decays to the MATHUSLA background throughout its lifetime, providing valuable insights for future analyses. 

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