Spin correlations in the τ-lepton pair in polarized electron-positron annihilation
Abstract
Possible anomalous New Physics contributions to dipole and weak dipole moments of the τ lepton rise considerable interest in theoretical and experimental studies of the τ-pair production in electron-positron annihilation and in proton-proton collisions at the LHC. In the present paper we discuss and calculate the spin-correlation matrix in the e+ e- → τ+ τ-, and in general f f̅ → τ+ τ- processes, including New Physics contributions to the γττ and $Z ττ$ vertices and longitudinally polarized beams of initial fermions. The τ decays are included as well. This work is an upgrade of our previous studies of the spin correlations in the ττ system produced in the processes with unpolarized initial fermions (e- e+ and qq̅). A corresponding numerical code is developed. Brief information on how to use and configure the MC programs with a new subroutine is also given.
Related
- Controlling Quantum discord and steering in Electron-Positron Annihilation Using Polarized Beams
- The ψ(2S) state as a subthreshold pole in electron positron annihilation into DD̅ final states
- Observation of quantum entanglement in Λ Λ̅ pair production via electron-positron annihilation
- Nonlocal advantage of quantum coherence in tau-lepton pairs from electron--positron collisions
- Positron annihilation into two or three gammas in Geant4
BibTeX
@misc{korchin2026spin,
title = {{Spin correlations in the $τ$-lepton pair in polarized electron-positron annihilation}},
author = {A. Yu. Korchin and Z. Was},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.30325},
eprint = {2610.30325},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.30325},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Spin correlations in the τ-lepton pair in polarized electron-positron annihilation
AU - A. Yu. Korchin
AU - Z. Was
PY - 2026
DA - 2026/10/21
PB - arXiv
DO - 10.48550/arxiv.2610.30325
UR - https://arxiv.org/abs/2610.30325
AB - Possible anomalous New Physics contributions to dipole and weak dipole moments of the τ lepton rise considerable interest in theoretical and experimental studies of the τ-pair production in electron-positron annihilation and in proton-proton collisions at the LHC. In the present paper we discuss and calculate the spin-correlation matrix in the e^+ e^- → τ^+ τ^-, and in general f f̅ → τ^+ τ^- processes, including New Physics contributions to the γττ and $Z ττ$ vertices and longitudinally polarized beams of initial fermions. The τ decays are included as well. This work is an upgrade of our previous studies of the spin correlations in the ττ system produced in the processes with unpolarized initial fermions (e^- e^+ and qq̅). A corresponding numerical code is developed. Brief information on how to use and configure the MC programs with a new subroutine is also given.
ER -