A low-energy perspective on the minimal left-right symmetric model

Abstract We perform a global analysis of the low-energy phenomenology of the minimal left-right symmetric model (mLRSM) with parity symmetry. We match the mLRSM to the Standard Model Effective Field Theory Lagrangian at the left-right-symmetry breaking scale and perform a comprehensive fit to low-en...

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Autores principales:	W. Dekens, L. Andreoli, J. de Vries, E. Mereghetti, F. Oosterhof
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Beyond Standard Model CP violation Effective Field Theories Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/beb491e08f7f4244bf74ccc47cf81a12
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spelling	oai:doaj.org-article:beb491e08f7f4244bf74ccc47cf81a122021-11-21T12:41:36ZA low-energy perspective on the minimal left-right symmetric model10.1007/JHEP11(2021)1271029-8479https://doaj.org/article/beb491e08f7f4244bf74ccc47cf81a122021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)127https://doaj.org/toc/1029-8479Abstract We perform a global analysis of the low-energy phenomenology of the minimal left-right symmetric model (mLRSM) with parity symmetry. We match the mLRSM to the Standard Model Effective Field Theory Lagrangian at the left-right-symmetry breaking scale and perform a comprehensive fit to low-energy data including mesonic, neutron, and nuclear β-decay processes, ∆F = 1 and ∆F = 2 CP-even and -odd processes in the bottom and strange sectors, and electric dipole moments (EDMs) of nucleons, nuclei, and atoms. We fit the Cabibbo-Kobayashi-Maskawa and mLRSM parameters simultaneously and determine a lower bound on the mass of the right-handed W R boson. In models where a Peccei-Quinn mechanism provides a solution to the strong CP problem, we obtain M W R $$ {M}_{W_R} $$ ≳ 5.5 TeV at 95% C.L. which can be significantly improved with next-generation EDM experiments. In the P-symmetric mLRSM without a Peccei-Quinn mechanism we obtain a more stringent constraint M W R $$ {M}_{W_R} $$ ≳ 17 TeV at 95% C.L., which is difficult to improve with low-energy measurements alone. In all cases, the additional scalar fields of the mLRSM are required to be a few times heavier than the right-handed gauge bosons. We consider a recent discrepancy in tests of first-row unitarity of the CKM matrix. We find that, while TeV-scale W R bosons can alleviate some of the tension found in the V ud,us determinations, a solution to the discrepancy is disfavored when taking into account other low-energy observables within the mLRSM.W. DekensL. AndreoliJ. de VriesE. MereghettiF. OosterhofSpringerOpenarticleBeyond Standard ModelCP violationEffective Field TheoriesNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-74 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Beyond Standard Model CP violation Effective Field Theories Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Beyond Standard Model CP violation Effective Field Theories Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 W. Dekens L. Andreoli J. de Vries E. Mereghetti F. Oosterhof A low-energy perspective on the minimal left-right symmetric model
description	Abstract We perform a global analysis of the low-energy phenomenology of the minimal left-right symmetric model (mLRSM) with parity symmetry. We match the mLRSM to the Standard Model Effective Field Theory Lagrangian at the left-right-symmetry breaking scale and perform a comprehensive fit to low-energy data including mesonic, neutron, and nuclear β-decay processes, ∆F = 1 and ∆F = 2 CP-even and -odd processes in the bottom and strange sectors, and electric dipole moments (EDMs) of nucleons, nuclei, and atoms. We fit the Cabibbo-Kobayashi-Maskawa and mLRSM parameters simultaneously and determine a lower bound on the mass of the right-handed W R boson. In models where a Peccei-Quinn mechanism provides a solution to the strong CP problem, we obtain M W R $$ {M}_{W_R} $$ ≳ 5.5 TeV at 95% C.L. which can be significantly improved with next-generation EDM experiments. In the P-symmetric mLRSM without a Peccei-Quinn mechanism we obtain a more stringent constraint M W R $$ {M}_{W_R} $$ ≳ 17 TeV at 95% C.L., which is difficult to improve with low-energy measurements alone. In all cases, the additional scalar fields of the mLRSM are required to be a few times heavier than the right-handed gauge bosons. We consider a recent discrepancy in tests of first-row unitarity of the CKM matrix. We find that, while TeV-scale W R bosons can alleviate some of the tension found in the V ud,us determinations, a solution to the discrepancy is disfavored when taking into account other low-energy observables within the mLRSM.
format	article
author	W. Dekens L. Andreoli J. de Vries E. Mereghetti F. Oosterhof
author_facet	W. Dekens L. Andreoli J. de Vries E. Mereghetti F. Oosterhof
author_sort	W. Dekens
title	A low-energy perspective on the minimal left-right symmetric model
title_short	A low-energy perspective on the minimal left-right symmetric model
title_full	A low-energy perspective on the minimal left-right symmetric model
title_fullStr	A low-energy perspective on the minimal left-right symmetric model
title_full_unstemmed	A low-energy perspective on the minimal left-right symmetric model
title_sort	low-energy perspective on the minimal left-right symmetric model
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/beb491e08f7f4244bf74ccc47cf81a12
work_keys_str_mv	AT wdekens alowenergyperspectiveontheminimalleftrightsymmetricmodel AT landreoli alowenergyperspectiveontheminimalleftrightsymmetricmodel AT jdevries alowenergyperspectiveontheminimalleftrightsymmetricmodel AT emereghetti alowenergyperspectiveontheminimalleftrightsymmetricmodel AT foosterhof alowenergyperspectiveontheminimalleftrightsymmetricmodel AT wdekens lowenergyperspectiveontheminimalleftrightsymmetricmodel AT landreoli lowenergyperspectiveontheminimalleftrightsymmetricmodel AT jdevries lowenergyperspectiveontheminimalleftrightsymmetricmodel AT emereghetti lowenergyperspectiveontheminimalleftrightsymmetricmodel AT foosterhof lowenergyperspectiveontheminimalleftrightsymmetricmodel
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A low-energy perspective on the minimal left-right symmetric model

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