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{title2=2000}

https://arxiv.org/abs/hep-ex/0010072

The experiment identifies <tau lepton> pairs with mixed <electron>-<muon> decays and missing <energy>, and subtracts a nonresonant continuum contribution. This provides a concrete implementation of a leptonic <tau lepton> selection near the charmonium threshold.

First Measurement of the Branching Fraction of the Decay psi(2S) to tau pairs by the BES Collaboration

Past exam of the particle physics course of the University of Oxford / 2021 / 1 / c / Solution

Past exam of the particle physics course of the University of Oxford / 2021 / 1 / d / Solution

First Measurement of the Branching Fraction of the Decay psi(2S) to tau pairs by the BES Collaboration (2000)

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First Measurement of the Branching Fraction of the Decay psi(2S) to tau pairs by the BES Collaboration (2000)

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