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Constraints on Non-Standard Contributions to the Charged-Current Interactions by Hagiwara, Kaoru; Matsumoto, Seiji is a scholarly article available to read on EtoBox.

What is Constraints on Non-Standard Contributions to the Charged-Current Interactions about?

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.

Author

Hagiwara, Kaoru; Matsumoto, Seiji

Published

1997

Language

EN