Spin effects in the tau-lepton pair induced by anomalous magnetic and electric dipole moments
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866908990601953280 |
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| author | Korchin, A. Yu. |
| author_facet | Korchin, A. Yu. |
| contents | The possible anomalous New Physics contributions to magnetic and electric dipole moments of the $τ$ lepton have brought renewed interest in studying $τ$-pair production at energies of the LHC and future colliders. We discuss effects of electromagnetic and weak dipole moment contributions to the $τ$-lepton polarization and $ττ$ spin correlations in the $γγ\to τ^-τ^+$ and $q \bar{q} \to τ^- τ^+$ processes. Such processes have been observed in $pp$ and PbPb collisions in the LHC experiments. Extensions of the Standard Model amplitudes for $γγ\to τ^-τ^+$ and $q \bar{q} \to τ^- τ^+$ processes, which include dipole moments of the $τ$ lepton, are implemented in the TauSpinner Monte Carlo program. A few examples of signatures of $ττ$ spin correlations and $τ$-lepton dipole moments in observables are presented. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_23839 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Spin effects in the tau-lepton pair induced by anomalous magnetic and electric dipole moments Korchin, A. Yu. High Energy Physics - Phenomenology The possible anomalous New Physics contributions to magnetic and electric dipole moments of the $τ$ lepton have brought renewed interest in studying $τ$-pair production at energies of the LHC and future colliders. We discuss effects of electromagnetic and weak dipole moment contributions to the $τ$-lepton polarization and $ττ$ spin correlations in the $γγ\to τ^-τ^+$ and $q \bar{q} \to τ^- τ^+$ processes. Such processes have been observed in $pp$ and PbPb collisions in the LHC experiments. Extensions of the Standard Model amplitudes for $γγ\to τ^-τ^+$ and $q \bar{q} \to τ^- τ^+$ processes, which include dipole moments of the $τ$ lepton, are implemented in the TauSpinner Monte Carlo program. A few examples of signatures of $ττ$ spin correlations and $τ$-lepton dipole moments in observables are presented. |
| title | Spin effects in the tau-lepton pair induced by anomalous magnetic and electric dipole moments |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2602.23839 |