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Abstract <p>An 256-channel electromagnetic calorimeter based on lead tungstate crystals is proposed for the studies of neutral meson and direct photon production and single-spin asymmetry measurements at the U70 accelerator facility at the National Research Centre ‘‘Kurchatov Institute’’—Institute of High Energy Physics. The U70 facility provides unique possibilities to perform such measurements with different types of polarized and unpolarized beams such as <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\pi^{\pm}\)</EquationSource> <!--BPhysMGU2570261Blau-m1--> </InlineEquation>, K, p, <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\bar{p}\)</EquationSource> <!--BPhysMGU2570261Blau-m2--> </InlineEquation>, d, C. The results of Monte Carlo simulations of neutral meson spectra measurements are presented. The simulations are performed using GEANT4 tracking and realistic reconstruction in the calorimeter using events with single <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\pi^{0}\)</EquationSource> <!--BPhysMGU2570261Blau-m3--> </InlineEquation> meson with flat transverse momentum spectra as well as full PYTHIA8 generated events. Different geometry options are evaluated, and optimal positions of the calorimeter in the SPASCHARM experiment setup are discussed.</p>

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Performance Studies of Neutral Meson Measurements Possibilities with Precision Electromagnetic Calorimeter at U70 Facility

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • D. S. Blau,
  • D. A. Averyanov,
  • D. Yu. Peresunko

摘要

Abstract

An 256-channel electromagnetic calorimeter based on lead tungstate crystals is proposed for the studies of neutral meson and direct photon production and single-spin asymmetry measurements at the U70 accelerator facility at the National Research Centre ‘‘Kurchatov Institute’’—Institute of High Energy Physics. The U70 facility provides unique possibilities to perform such measurements with different types of polarized and unpolarized beams such as \(\pi^{\pm}\) , K, p, \(\bar{p}\) , d, C. The results of Monte Carlo simulations of neutral meson spectra measurements are presented. The simulations are performed using GEANT4 tracking and realistic reconstruction in the calorimeter using events with single \(\pi^{0}\) meson with flat transverse momentum spectra as well as full PYTHIA8 generated events. Different geometry options are evaluated, and optimal positions of the calorimeter in the SPASCHARM experiment setup are discussed.