Precision Monte Carlo  and anomalous dipole moments
Project 10-138 (Di Ciaccio – Was)

Zbigniew Was
IFJ PAN Krakow Poland

Over the last year of collaboration we were working on preparation of simulation tools
to evaluate detector responses due to implementation of anomalous dipole moments
(electric and magnetic) on top of precision simulation of
e+e- -->  tau+ tau- processes at Belle2 or FCC conditions as well as for
pp -->  tau+ tau- X processes of LHC. To this end event reweighting algorithm was prepared,
which can be now used by experimental physicist e.g. of LAPP Annecy.

The interest of these phenomena is due to recent indication that such effects may be close
to statistical significance in muon pair production. Thus it can be  potential hint of New Physics
phenomena.

References to presented work:
1) Electron-positron, parton-parton and photon-photon production of tau -lepton pairs: anomalous
   magnetic and electric dipole moments spin effects,  Sw. Banerjee, A.Yu. Korchin, E. Richter-Was,
   Z. Was  e-Print: 2307.03526 [hep-ph]
2) Spin correlations in tau-lepton pair production due to anomalous magnetic and electric dipole moments,
   Sw. Banerjee,A.Yu. Korchin,Z. Was, Phys.Rev.D 106 (2022) 11, 113010