München 2019 – scientific programme
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 7: Hadron Accelerators and Colliders
AKBP 7.3: Talk
Tuesday, March 19, 2019, 14:30–14:45, HS 7
Search for Electric Dipole Moments at COSY in Jülich - Spin Tracking Simulations using Bmad — •Vera Poncza1,2 and Andreas Lehrach1,2 for the JEDI collaboration — 1Institute for Nuclear Physics IV , FZ Jülich, Germany — 2III. Physikalisches Institut B, RWTH Aachen University, Germany
The observed matter-antimatter asymmetry in the universe cannot be explained by the Standard Model (SM) of particle physics. In order to resolve the matter dominance an additional CP violating phenomenon is needed. A candidate for physics beyond the SM is a non-vanishing Electric Dipole Moment (EDM) of subatomic particles. Since permanent EDMs violate parity and time reversal symmetries, they are also CP violating if the CPT-theorem is assumed.
The JEDI (Jülich Electric Dipole moment Investigations) collaboration in Jülich is preparing a direct EDM measurement of protons and deuterons first at the storage ring COSY (COoler SYnchrotron) and later at a dedicated storage ring.
In order to analyse the data and to disentangle the EDM signal from systematic effects spin tracking simulations are needed. Therefore a model of COSY was implemented using the software library Bmad. It includes the measured magnet misalignments of the latest survey and a simplified description of the RF-Wien Filter device that is used for the EDM measurement. Simulation results regarding the invariant spin axis as well as closed orbit simulations will be presented.