We report recent measurements on tau leptons obtained by the BABAR collaboration using the entire recorded sample of electron-positron collisions at and around the Upsilon(4S) (about 470fb -1). The events were recorded at the PEP-II asymmetric collider at the SLAC National Accelerator Laboratory. The measurements include high multiplicity tau decay branching fractions with 3 or 5 charged particles in the final state, a search for the second class current the tau decay tau rarr pieta'nu, tau branching fractions into final states containing two K S mesons, tau rarr h - K S0 K S0 (pi 0) nu tau, with h = pi, K, and preliminary measurements of hadronic spectra of tau decays with three hadrons (tau - rarr h -h +h -nu tau decays, where h = pi, K). The results improve the experimental knowledge of the tau lepton properties and can be used to improve the precision tests of the Standard Model.
Recent tau lepton results from BABAR
LUSIANI, AlbertoWriting – Original Draft Preparation
2014
Abstract
We report recent measurements on tau leptons obtained by the BABAR collaboration using the entire recorded sample of electron-positron collisions at and around the Upsilon(4S) (about 470fb -1). The events were recorded at the PEP-II asymmetric collider at the SLAC National Accelerator Laboratory. The measurements include high multiplicity tau decay branching fractions with 3 or 5 charged particles in the final state, a search for the second class current the tau decay tau rarr pieta'nu, tau branching fractions into final states containing two K S mesons, tau rarr h - K S0 K S0 (pi 0) nu tau, with h = pi, K, and preliminary measurements of hadronic spectra of tau decays with three hadrons (tau - rarr h -h +h -nu tau decays, where h = pi, K). The results improve the experimental knowledge of the tau lepton properties and can be used to improve the precision tests of the Standard Model.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.