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Study of Corrections for Anomalous Coupling Limits Due to the Possible Background BSM Contributions

التفاصيل البيبلوغرافية
العنوان: Study of Corrections for Anomalous Coupling Limits Due to the Possible Background BSM Contributions
المؤلفون: Artur E. Semushin, Evgeny Yu. Soldatov
المصدر: Symmetry, Vol 14, Iss 2082, p 2082 (2022)
بيانات النشر: MDPI AG
سنة النشر: 2022
المجموعة: Directory of Open Access Journals: DOAJ Articles
مصطلحات موضوعية: Standard Model, quartic gauge couplings, anomalous couplings, effective field theory, Wilson coefficients, limit setting, Mathematics, QA1-939
الوصف: The search for anomalous couplings is one of the possible ways to find any deviations from the Standard Model. Effective field theory is used to parameterize the anomalous couplings in the Lagrangian with operators of higher dimensions constructed from the SM fields. In the classical way, the limits on the Wilson coefficients of these operators are set based on beyond the Standard Model contributions induced for the signal process, whereas the ones induced for background processes are assumed to be negligible. This article provides a study of the corrections to the limits on Wilson coefficients by considering beyond the Standard Model contributions induced for background processes. The studies of Z ( ν ν ¯ ) γ j j and W ( ℓ ν ) γ j j productions in p p collisions with s = 13 TeV and conditions of the ATLAS experiment at the LHC are used as an example. Cases with integrated luminosity collected during Run II of 139 fb − 1 and expected from Run III of 300 fb − 1 are considered. The expected 95% CL limits on coefficients f T 0 / Λ 4 , f T 5 / Λ 4 , f M 0 / Λ 4 and f M 2 / Λ 4 are obtained both in the classical way and in the way, where the corrections from background anomalous contributions are applied. Corrected one-dimensional limits from Z ( ν ν ¯ ) γ j j and W ( ℓ ν ) γ j j productions are up to 9.1% and 4.4% (depending on the operator) tighter than the classical ones, respectively. Corrected combined limits are up to 3.0% (depending on the operator) tighter than the classical ones. Corrections to two-dimensional limits are also obtained. The corrected contours are more ...
نوع الوثيقة: article in journal/newspaper
اللغة: English
تدمد: 2073-8994
العلاقة: https://www.mdpi.com/2073-8994/14/10/2082Test; https://doaj.org/toc/2073-8994Test; https://doaj.org/article/0576f50aec9f4030afd865021443ded8Test
DOI: 10.3390/sym14102082
الإتاحة: https://doi.org/10.3390/sym14102082Test
https://doaj.org/article/0576f50aec9f4030afd865021443ded8Test
رقم الانضمام: edsbas.89B115E5
قاعدة البيانات: BASE
الوصف
تدمد:20738994
DOI:10.3390/sym14102082