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Effect of calorimeter removal on Drell-Yan measurements in the AMBER experiment

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Resumo:This work investigates how the removal of calorimeters could affect Drell-Yan measurements in the AMBER experiment at CERN. Through systematic Monte Carlo simulations, 8 different calorimeter configurations were studied, 4 for the Large Angle Spectrometer (LAS) and 4 for the Small Angle Spectrometer (SAS) subsystems, combining the presence or absence of ECAL1, ECAL2, HCAL1, and HCAL2. The hypothesis is that calorimeter removal should not affect the experiment, as they act only as passive elements for muon identification. To automate and simplify the simulation process across multiple scenarios, the software AMBER Simulation Chain Manager was developed, a framework enabling researchers without specialized software expertise to run complete simulation chains locally, facilitating focus on physics rather than computing complexity. The study reveals that the standard PHAST muon identification threshold of 30 /₀ is insufficient for SAS configurations without calorimeters, as MF2 alone provides only 20.78 /₀. However, when considering a reduced threshold of 20 /₀, no significant differences are observed between any setup with respect to dimuon acceptance, resolution of variables, variable distributions, and detection patterns between LAS and SAS. These results demonstrate that calorimeters can be safely removed without degrading reconstruction quality or experimental performance. However, adjustments are required either in the software, by lowering the PHAST threshold, or in the hardware, by adding material to SAS. These findings open the possibility for optimizing the detector geometry, potentially improving acceptance and efficiency while maintaining reconstruction robustness in future AMBER configurations.
Autores principais:Casanelli Riveros, Bryan Enrique
Assunto:AMBER Drell-Yan Monte Carlo simulation Optimization Calorimeters
Ano:2025
País:Portugal
Tipo de documento:dissertação de mestrado
Tipo de acesso:acesso aberto
Instituição associada:Universidade de Aveiro
Idioma:inglês
Origem:RIA - Repositório Institucional da Universidade de Aveiro
Descrição
Resumo:This work investigates how the removal of calorimeters could affect Drell-Yan measurements in the AMBER experiment at CERN. Through systematic Monte Carlo simulations, 8 different calorimeter configurations were studied, 4 for the Large Angle Spectrometer (LAS) and 4 for the Small Angle Spectrometer (SAS) subsystems, combining the presence or absence of ECAL1, ECAL2, HCAL1, and HCAL2. The hypothesis is that calorimeter removal should not affect the experiment, as they act only as passive elements for muon identification. To automate and simplify the simulation process across multiple scenarios, the software AMBER Simulation Chain Manager was developed, a framework enabling researchers without specialized software expertise to run complete simulation chains locally, facilitating focus on physics rather than computing complexity. The study reveals that the standard PHAST muon identification threshold of 30 /₀ is insufficient for SAS configurations without calorimeters, as MF2 alone provides only 20.78 /₀. However, when considering a reduced threshold of 20 /₀, no significant differences are observed between any setup with respect to dimuon acceptance, resolution of variables, variable distributions, and detection patterns between LAS and SAS. These results demonstrate that calorimeters can be safely removed without degrading reconstruction quality or experimental performance. However, adjustments are required either in the software, by lowering the PHAST threshold, or in the hardware, by adding material to SAS. These findings open the possibility for optimizing the detector geometry, potentially improving acceptance and efficiency while maintaining reconstruction robustness in future AMBER configurations.

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