Simulation of a Positron-Induced Muon Source

Prerequisites

Python versions used and supported:

Description and Results

The work is part of a set of preliminary studies for Low EMittance Muon Accelerator (LEMMA) Collaboration.

Through a Monte Carlo simulation we study the kinematic features of a low emittance muon beams from e+ e- collisions at centre-of-mass energy just above the μ+ μ- production threshold corresponding to a positron beam of about 45 GeV.

At the end we obtain the hits distribution in the detector plane and the momenta distributions in the laboratory frame for (anti-)muons. Regarding of modeling we assumed a positron beam in which particles are uniform distribuited in a circle and with energies gaussian distributed. An angular smearing is also considered for each particle composing the incident beam. For the taghet we cosider a 6 cm thick Beryllium block and to obtain the hits distribution for μ+ and μ- we assume the presence of a 2 meter long, 1.7 Tesla dipole magnet placed after the target.

All the parameters set in the simulation are easily editable.

Authors:

• Alberto Chimenti (University of Padova)
• Clara Eminente (University of Padova)
• Matteo Guida (University of Padova)

Supervised by:

• Professor Marco Zanetti (University of Padova, CERN)
• Camilla Curatolo (University of Padova, INFN)

Useful External Links:

1. LEMMA, the original paper describing the positron-induced low emittance muon source, here all the relevant kinematic features of the process have been studied

2. Babayaga Monte Carlo event generator for processes at flavour factories. It is used in our simulation for the comparison of the results obtained.

3. Main theoretical source :

   3.1. Michael E. Peskin, Dan V. Schroeder - An Introduction to Quantum Field Theory.

   3.2. S Y Lee - Accelerator Physics.

4. Doane's formula for binning histograms. Doane DP (1976) Aesthetic frequency classification