Positivity in electron-positron scattering: testing the axiomatic quantum field theory principles and probing the existence of UV states
| العنوان: | Positivity in electron-positron scattering: testing the axiomatic quantum field theory principles and probing the existence of UV states |
|---|---|
| المؤلفون: | Shuang-Yong Zhou, Benjamin Fuks, Cen Zhang, Yiming Liu |
| المساهمون: | Laboratoire de Physique Théorique et Hautes Energies (LPTHE), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Chin.Phys.C Chin.Phys.C, 2021, 45 (2), pp.023108. ⟨10.1088/1674-1137/abcd8c⟩ Chinese Physics |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | High Energy Physics - Theory, Nuclear and High Energy Physics, Physics beyond the Standard Model, standard model, FOS: Physical sciences, Parameter space, field theory, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Theoretical physics, High Energy Physics - Phenomenology (hep-ph), electron positron --> electron positron, effective field theory, electron positron: elastic scattering, operator: dimension: 8, 0103 physical sciences, Effective field theory, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Quantum field theory, 010306 general physics, Instrumentation, S-matrix, Physics, 010308 nuclear & particles physics, new physics, [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th], Axiomatic quantum field theory, Astronomy and Astrophysics, Quantum number, Standard Model (mathematical formulation), High Energy Physics - Phenomenology, High Energy Physics - Theory (hep-th), [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] |
| الوصف: | We consider the positivity bounds on dimension-8 four-electron operators and study two related phenomenological aspects at future lepton colliders. First, if positivity is violated, probing such violations will revolutionize our understanding of the fundamental pillars of quantum field theory and the $S$-matrix theory. We observe that positivity violation at scales of 1--10 TeV can potentially be probed at future lepton colliders even if one assumes that dimension-6 operators are also present. Second, the positive nature of the dimension-8 parameter space often allows us to either directly infer the existence of UV-scale particles together with their quantum numbers or exclude them up to certain scales in a model-independent way. In particular, dimension-8 positivity plays an important role in the test of the Standard Model. If no deviations from the Standard Model are observed, it allows for simultaneous exclusion limits on all kinds of potential UV-complete models. Unlike the dimension-6 case, these limits apply regardless of the UV model setup and cannot be removed by possible cancellations among various UV contributions. This thus consists of a novel and universal test to confirm the Standard Model. We demonstrate with realistic examples how all the previously mentioned possibilities, including the test of positivity violation, can be achieved. Hence, we provide an important motivation for studying dimension-8 operators more comprehensively. 24 pages, 6 figures; typos corrected |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c53a01bb93294a9ebabb034bee752c87 http://arxiv.org/abs/2009.02212 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....c53a01bb93294a9ebabb034bee752c87 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |