Probing QCD instantons using jet correlation observables in proton-proton collisions at the LHC
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917429757607936 |
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| author | Guin, Sayak Tah, Swagatam Sahoo, Nihar Ranjan Sharma, Sayantan |
| author_facet | Guin, Sayak Tah, Swagatam Sahoo, Nihar Ranjan Sharma, Sayantan |
| contents | Discovery of instantons in colliders will provide experimental evidence for the topological properties of the QCD vacuum. In this work, we propose jet correlation observables that can unambiguously discriminate between instanton-induced processes and perturbative hard scattering events in pp collisions at LHC energies. By calculating the instanton sizes and their separations in 2+1 flavor QCD with physical quark masses, we provide constraints on the center-of-mass energies of the produced hadrons in an instanton-induced process. Our proposal is directly applicable for future ep measurements at the Electron-Ion Collider, offering a cleaner environment to probe instanton-induced processes. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_20780 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Probing QCD instantons using jet correlation observables in proton-proton collisions at the LHC Guin, Sayak Tah, Swagatam Sahoo, Nihar Ranjan Sharma, Sayantan High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Experiment Nuclear Theory Discovery of instantons in colliders will provide experimental evidence for the topological properties of the QCD vacuum. In this work, we propose jet correlation observables that can unambiguously discriminate between instanton-induced processes and perturbative hard scattering events in pp collisions at LHC energies. By calculating the instanton sizes and their separations in 2+1 flavor QCD with physical quark masses, we provide constraints on the center-of-mass energies of the produced hadrons in an instanton-induced process. Our proposal is directly applicable for future ep measurements at the Electron-Ion Collider, offering a cleaner environment to probe instanton-induced processes. |
| title | Probing QCD instantons using jet correlation observables in proton-proton collisions at the LHC |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment High Energy Physics - Lattice Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2604.20780 |