Is muon trident production included?

Physics Processes, Models and Cross Sections
1

I was wondering if trident production by muon, i.e. the pair production of two muons by an incident muon in the field of a nucleus, is included in physics processes. I don’t see it in EM sub-packages and processes | geant4.web.cern.ch but perhaps it is inside some package? Thanks.

2

Hello Charles,

this process is not implemented yet. What energies of projectile are of your interest?

Vladimir

3

Thanks Vladimir! It would be great to cover “all energies” of projectile muon, meaning all energies where this process is kinematically allowed.
The papers on tridents (that I know about) are old and many if not all predate the discovery of the Z boson.We may need to impose a cutoff on q-square values unless there are newer cross section formulas.

4

Can you, please, show the link to the paper?

VI

5

Tannenbaum’s paper is at Phys. Rev. 167, 1308 (1968) - Muon Tridents. He mentioned using a computer code by Stan Brodsky.

ALEPH observed such events. Phys. Rev. Lett. 96, 021801 (2006) - Muon-Pair Production by Atmospheric Muons in CosmoALEPH has a number of references 11 through 14 for the formulation. FWIW, it said that Geant3 has this process included.

6

The latest release notes (for 11.1) includes this point:

  • New model and process for muon pair production by muon.

Is this trident production of this thread? Thanks!

7

Hi Charles,

yes, thanks for your push.

Vladimir