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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2403.06336 |
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| _version_ | 1866929631354945536 |
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| author | Beresford, Lydia Clawson, Savannah Liu, Jesse |
| author_facet | Beresford, Lydia Clawson, Savannah Liu, Jesse |
| contents | Measuring the tau-lepton ($τ$) anomalous magnetic moment $a_τ= (g_τ-2)/2$ in photon fusion production ($γγ\toττ$) tests foundational Standard Model principles. However, $γγ\toττ$ eludes observation in LHC proton collisions (pp) despite enhanced new physics sensitivity from higher-mass reach than existing probes. We propose a novel strategy to measure $\text{pp} \to \text{p}(γγ\toττ)\text{p}$ by introducing the overlooked electron-muon signature with vertex isolation for signal extraction. Applying the effective field theory of dipole moments, we estimate 95% CL sensitivity of $-0.0092 < a_τ< 0.011$ assuming 300 fb$^{-1}$ luminosity and 5% systematics. This fourfold improvement beyond existing constraints opens a crucial path to unveiling new physics imprinted in tau-lepton dipoles. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_06336 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Strategy to measure tau $g-2$ via photon fusion in LHC proton collisions Beresford, Lydia Clawson, Savannah Liu, Jesse High Energy Physics - Phenomenology Measuring the tau-lepton ($τ$) anomalous magnetic moment $a_τ= (g_τ-2)/2$ in photon fusion production ($γγ\toττ$) tests foundational Standard Model principles. However, $γγ\toττ$ eludes observation in LHC proton collisions (pp) despite enhanced new physics sensitivity from higher-mass reach than existing probes. We propose a novel strategy to measure $\text{pp} \to \text{p}(γγ\toττ)\text{p}$ by introducing the overlooked electron-muon signature with vertex isolation for signal extraction. Applying the effective field theory of dipole moments, we estimate 95% CL sensitivity of $-0.0092 < a_τ< 0.011$ assuming 300 fb$^{-1}$ luminosity and 5% systematics. This fourfold improvement beyond existing constraints opens a crucial path to unveiling new physics imprinted in tau-lepton dipoles. |
| title | Strategy to measure tau $g-2$ via photon fusion in LHC proton collisions |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2403.06336 |