A simulation study for one-pion exchange contribution on very forward neutron productions in ATLAS-LHCf common events

 Materials

● Poster

● Proceeding: https://pos.sissa.it/395/190

Title: A simulation study for one-pion exchange contribution on very forward neutron productions in ATLAS-LHCf common events

Author: Ken Ohashi
Co-Authors: Yoshitaka Itow | Hiroaki Menjo | Takashi Sako

Abstract:

Interpretations of the mass composition of ultra-high energy cosmic rays are unclear owing to uncertainties in the hadronic interaction models. Therefore, validations of hadronic interaction models via experiments are required. Recently, the LHCf experiment demonstrated differences in very forward neutron productions between data and predictions using hadronic interaction models for pseudo-rapidity larger than 10.76. Contributions of the one-pion exchange process, diffractive collisions, and non-diffractive collisions are possible sources of these differences. These three contributions exhibit different effects on the mass-sensitive observables of ultra-high energy cosmic-ray experiments; hence, it is crucial to measure these contributions separately. In this study, we present a method for separating the contribution of the one-pion exchange process from contributions of diffractive and non-diffractive collisions in ATLAS and LHCf detectors, considering detector resolutions in LHC-Run2 and Run3.

Discussion timeslot (ZOOM-Meeting): 14. July 2021 - 18:00

ZOOM-Meeting URL: https://desy.zoom.us/j/92210078166

ZOOM-Meeting ID: 92210078166

ZOOM-Meeting Passcode: ICRC2021

Corresponding Session: https://icrc2021-venue.desy.de/channel/03-Muon-Puzzle-and-EAS-modeling-CRI/110

Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-03/4