Leveraging intermediate resonances to probe CP violation at colliders
| Autor: | Bigaran, Innes, Isaacson, Joshua, Kim, Taegyun, Tame-Narvaez, Karla |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We study the phenomenological implications of interference between tree-level contributions to three-body final states in $2\to 3$ scattering. We propose a new CP-violating observable in this scattering which probes the different virtualities of intermediate resonances, in the presence of Standard Model~(SM) and new physics contributions to these processes. Analytically, we demonstrate the efficacy of this observable in probing interference between SM charged-current decays and effective left-handed vector interactions, and in a toy model featuring a scalar leptoquark, $S_1 \sim (3, 1, -1/3)$. Numerically, we apply this formalism to studying the decay $pp\to b \tau\nu$ over the full kinematic region of final-state phase space. In contrast to existing probes of new physics at colliders, this study demonstrates a use for an intermediate region of energies, where new physics is not light enough to produced on shell, but not heavy enough to be integrated out and treated with effective-theory formalism. Furthermore, we perform a proof-of-principle analysis to demonstrate how this new search can be complementary to the traditional high-transverse momentum searches. In light of the large amount of data to be collected at the high-luminosity LHC, this study paves the way to further spectroscopic studies to probe CP-violation in $2\to 3$ processes at the LHC and at future colliders. Comment: 24 pages, 10 figures |
| Databáze: | arXiv |
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