Abstract
The Muon g-2/EDM proposed experiment at J-PARC is a promising and innovative attempt at the field of Precision Physics. The sensitivity goal of 0.1 ppm will test the limits of our current understanding, and may probe for Beyond the Standard Model observations. This paper seeks out to investigate the computational techniques required by the experiment. The GEANT4 [1] framework was used to simulate the detector setup, according to the experiment’s Conceptual Design Report (CDR) [2]. This allowed to observe the event hierarchy in different energies, generate signal hit data, and construct an event-selection algorithm. ROOT and GDML enabled us to use the geometry and parsed output data in a platform-independent way. Using techniques pertaining to Machine Learning and Image Feature extraction, such as the Canny Edge detection and the Hough Transform, we were able to construct a generic representation of ‘track families’ from each event category. Finally, the modular GENFIT2 [3] framework was used to implement the Kalman Filter [4] along with an Deterministic Annealing Filter (DAF) [5] and the Runge-Kutta stepper to reconstruct tracks from a few digitized, smeared singular event data.
Highlights
The Standard Model (SM) has been one of the crowning achievements of human intellect
One of the most precisely measured quantities in particle physics, is the muon anomalous magnetic moment factor, αμ, which has served as a concrete testing ground for SM predictions
The 2006 muon g-2 experiment in Brookhaven [6] reached unprecedented precision of 0.54ppm, and constrained dμ to an upper limit o 1.9×10−19e·cm. When their results were published, a persistent discrepancy of ∼ 3.4σ was observed for αμ, while the dμ limit requires improvement to test against the SM prediction, marking the largest measured deviation for the Standard Model
Summary
The Standard Model (SM) has been one of the crowning achievements of human intellect. The 2006 muon g-2 experiment in Brookhaven [6] reached unprecedented precision of 0.54ppm, and constrained dμ to an upper limit o 1.9×10−19e·cm When their results were published, a persistent discrepancy of ∼ 3.4σ was observed for αμ, while the dμ limit requires improvement to test against the SM prediction, marking the largest measured deviation for the Standard Model. This statistically significant deviation, while not yet definitive, suggests that there may be effects on the muon’s anomalous magnetic moment factor, that cannot be explained in the SM framework.
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