5–7 Mar 2025 Conference
Nagoya University
Asia/Tokyo timezone

FASER experiment at the LHC and its connection to the cosmic-ray muon puzzle

6 Mar 2025, 12:50
20m
Sakata and Hirata Hall (Nagoya University)

Sakata and Hirata Hall

Nagoya University

Science South bulding, Furo-cho, Chikusa, Nagoya, Aichi, 464-8602, Japan
Invited Session6

Speaker

Ken Ohashi (LHEP, University of Bern)

Description

Ultra-high energy cosmic rays are the highest energy particles arriving at the Earth and measured using an extensive air shower induced by them. In 2015, the Pierre Auger Observatory reported an excess of the number of muons in an extensive air shower than that expected in simulations. This indicates a puzzle, a muon puzzle, suggesting the interactions in an extensive air shower are not reproduced well. Forward hadron productions are key parts of extensive air showers and the FASER experiment is sensitive to neutrinos decayed from these forward hadrons. In this talk, I review the recent results from the FASER experiment and discuss their implication for forward hadron productions.

Presentation materials