Beyond Jarlskog: 699 invariants for CP violation in SMEFT
| Autor: | Bonnefoy, Quentin, Gendy, Emanuele, Grojean, Christophe, Ruderman, Joshua T. |
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| Rok vydání: | 2022 |
| Předmět: |
High Energy Physics - Theory
Nuclear and High Energy Physics collective FOS: Physical sciences 0 [higher-order] conservation law: CP boson operator violation [CP] High Energy Physics - Experiment High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology (hep-ph) CP: violation ddc:530 boson: operator Flavour Symmetries CP Violation flavor CP [conservation law] higher-order: 0 conservation law CP CP violation operator: dimension High Energy Physics - Phenomenology High Energy Physics - Theory (hep-th) SMEFT higher-order 0 operator dimension operator [boson] Jarlskog dimension [operator] |
| Zdroj: | Journal of High Energy Physics Journal of high energy physics 08(8), 032 (2022). doi:10.1007/JHEP08(2022)032 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/jhep08(2022)032 |
| Popis: | Journal of high energy physics 08(8), 032 (2022). doi:10.1007/JHEP08(2022)032 As SMEFT is a framework of growing importance to analyze high-energy data, understanding its parameter space is crucial. The latter is commonly split into CP-even and CP-odd parts, but this classification is obscured by the fact that CP violation is actually a collective effect that is best captured by considering flavor-invariant combinations of Lagrangian parameters. First we show that fermion rephasing invariance imposes that several coefficients associated to dimension-six operators can never interfere with operators of dimension ≤ 4 and thus cannot appear in any physical observable at $ \mathcal{O} $1/Λ$^{2}$. For those that can, instead, we establish a one-to-one correspondence with CP-odd flavor invariants, all linear with respect to SMEFT coefficients. We explicitly present complete lists of such linear CP-odd invariants, and carefully examine their relationship to CP breaking throughout the parameter space of coefficients of dimension ≤ 4. Requiring that these invariants all vanish, together with the Jarlskog invariant, the strong-CP phase, and the 6 CP-violating dimension-6 bosonic operators, provides 699(+1 + 1 + 6) conditions for CP conservation to hold in any observable at leading order, $ \mathcal{O} $(1/Λ$^{2)}$. Published by SISSA, [Trieste] |
| Databáze: | OpenAIRE |
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