Performance evaluation of LHCf-ATLAS ZDC joint measurement using proton beam

¹ Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan
² INFN Section of Florence, Florence, Italy
³ University of Florence, Florence, Italy
⁴ Ecole-Polytechnique, Palaiseau, France
⁵ Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Japan
⁶ Faculty of System Engineering, Shibaura Institute of Technology, Japan
⁷ INFN Section of Catania, Catania, Italy
⁸ University of Catania, Catania, Italy
⁹ IFAC-CNR, Florence, Italy
¹⁰ ICRR, University of Tokyo, Kashiwa, Japan
¹¹ Tokushima University, Tokushima, Japan
¹² Kanagawa University, Kanagawa, Japan
¹³ RISE, Waseda University, Shinjuku, Tokyo, Japan
¹⁴ LBNL, Berkeley, California, USA
¹⁵ Centro Siciliano di Fisica Nucleare e di Struttura della Materia, CSFNSM, Catania, Italy
¹⁶ Ben-Gurion University of the Negev, Israel
¹⁷ Columbia University, New York, USA
¹⁸ University of Illinois at Urbana-Champaign, USA
¹⁹ Physics Department, Brookhaven National Laboratory, New York, USA

^* Corresponding author: kondo.moe@isee.nagoya-u.ac.jp

Published online: 28 April 2023

Abstract

Measurements of forward neutrons in pp collisions will allow us to investigate π-p cross-section via one-pion exchange process, which are important for air shower development. However, the precision of these measurements is limited by the energy resolution of the LHCf detectors. To improve it, a joint measurement with the ATLAS ZDC was planned. In 2021, a beam test was conducted to evaluate the performance of the joint measurement of the LHCf-Arm1 and ZDC detectors using proton beams of 350 GeV at SPS. Combining the LHCf data with the ZDC data, we confirmed that the energy resolution improved from about 40% to 21.4%.