Constraints on Non-Standard Contributions to the Charged-Current Interactions

The success of the quantum level predictions of the Standard Model on the $Z$ boson properties, on $\mw$ and on $\mt$, which makes use of the muon lifetime as an input, implies a stringent constraint on new physics contributions to the $V-A$ charged-current interactions among leptons. Observed unita...

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Detalles Bibliográficos
Autores principales: Hagiwara, Kaoru, Matsumoto, Seiji
Lenguaje:eng
Publicado: 1997
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(98)00224-X
https://dx.doi.org/10.1016/S0370-2693(00)00309-9
http://cds.cern.ch/record/340146
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author Hagiwara, Kaoru
Matsumoto, Seiji
author_facet Hagiwara, Kaoru
Matsumoto, Seiji
author_sort Hagiwara, Kaoru
collection CERN
description The success of the quantum level predictions of the Standard Model on the $Z$ boson properties, on $\mw$ and on $\mt$, which makes use of the muon lifetime as an input, implies a stringent constraint on new physics contributions to the $V-A$ charged-current interactions among leptons. Observed unitarity of the CKM matrix elements then implies constraints on non-standard contributions to the lepton-quark charged-current interactions. By using the recent electroweak data as inputs, we find the 95% CL limits for the corresponding contact interactions: $\Lambda_{CC,+}^{\ell\ell}>7.5$ TeV and the lepton-quark contact interactions.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1997
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spelling cern-3401462023-03-14T17:00:48Zdoi:10.1016/S0370-2693(98)00224-Xdoi:10.1016/S0370-2693(00)00309-9http://cds.cern.ch/record/340146engHagiwara, KaoruMatsumoto, SeijiConstraints on Non-Standard Contributions to the Charged-Current InteractionsParticle Physics - PhenomenologyThe success of the quantum level predictions of the Standard Model on the $Z$ boson properties, on $\mw$ and on $\mt$, which makes use of the muon lifetime as an input, implies a stringent constraint on new physics contributions to the $V-A$ charged-current interactions among leptons. Observed unitarity of the CKM matrix elements then implies constraints on non-standard contributions to the lepton-quark charged-current interactions. By using the recent electroweak data as inputs, we find the 95% CL limits for the corresponding contact interactions: $\Lambda_{CC,+}^{\ell\ell}>7.5$ TeV and the lepton-quark contact interactions.The success of the quantum level predictions of the Standard Model on the $Z$ boson properties, on $\mw$ and on $\mt$, which makes use of the muon lifetime as an input, implies a stringent constraint on new physics contributions to the $V-A$ charged-current interactions among leptons. Observed unitarity of the CKM matrix elements then implies constraints on non-standard contributions to the lepton-quark charged-current interactions. By using the recent electroweak data as inputs, we find the 95%~CL limits for the corresponding contact interactions: $\Lambda_{CC,+}^{\ell\ell}>7.5$ TeV and $\Lambda_{CC,-}^{\ell\ell}>10.2$ TeV for the purely leptonic terms, and $\Lambda_{CC,+}^{\ell q}>5.8$ TeV and $\Lambda_{CC,-}^{\ell q}>10.1$~TeV for the lepton-quark contact interactions.The success of the quantum level predictions of the Standard Model on the Z boson properties, on m W and on m t , which makes use of the muon lifetime as an input, implies a stringent constraint on new physics contributions to the V − A charged-current interactions among leptons. Observed unitarity of the CKM matrix elements then implies constraints on non-standard contributions to the lepton-quark charged-current interactions. By using the recent electroweak data as inputs, we find the 95% CL limits for the corresponding contact interactions: Λ CC ,+ ℓℓ >7.5 TeV and Λ CC ,− ℓℓ >10.2 TeV for the purely leptonic terms, and Λ CC ,+ ℓ q >5.8 TeV and Λ CC ,− ℓ q >10.1 TeV for the lepton-quark contact interactions.hep-ph/9712260CERN-TH-97-349KEK-TH-550CERN-TH-97-349KEK-TH-550oai:cds.cern.ch:3401461997-12-05
spellingShingle Particle Physics - Phenomenology
Hagiwara, Kaoru
Matsumoto, Seiji
Constraints on Non-Standard Contributions to the Charged-Current Interactions
title Constraints on Non-Standard Contributions to the Charged-Current Interactions
title_full Constraints on Non-Standard Contributions to the Charged-Current Interactions
title_fullStr Constraints on Non-Standard Contributions to the Charged-Current Interactions
title_full_unstemmed Constraints on Non-Standard Contributions to the Charged-Current Interactions
title_short Constraints on Non-Standard Contributions to the Charged-Current Interactions
title_sort constraints on non-standard contributions to the charged-current interactions
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0370-2693(98)00224-X
https://dx.doi.org/10.1016/S0370-2693(00)00309-9
http://cds.cern.ch/record/340146
work_keys_str_mv AT hagiwarakaoru constraintsonnonstandardcontributionstothechargedcurrentinteractions
AT matsumotoseiji constraintsonnonstandardcontributionstothechargedcurrentinteractions

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