Using 467fb(-1) of e+e- annihilation data collected with the BABAR detector, we measure (B(tau- mu- nu(mu) nu(tau)))/(B(tau- e- nu(e) nu(tau))) =(0.97960.00160.0036), (B(tau- pi- nu(tau)))/(B(tau- e- nu(e) nu(tau))) = (0.59450.00140.0061), and (B(tau- K- nu(tau)))/(B(tau- e- nu(e) nu(tau))) = (0.038820.000320.00057), where the uncertainties are statistical and systematic, respectively. From these precision tau measurements, we test the standard model assumption of mu-e and tau-mu charge current lepton universality and provide determinations of |Vus| experimentally independent of the decay of a kaon.

Measurements of charged current lepton universality and |Vus| using tau lepton decays to e- nu(e) nu(tau), mu- nu(mu) nu(tau), pi- nu(tau), and K- nu(tau).

PALANO, Antimo;
2010-01-01

Abstract

Using 467fb(-1) of e+e- annihilation data collected with the BABAR detector, we measure (B(tau- mu- nu(mu) nu(tau)))/(B(tau- e- nu(e) nu(tau))) =(0.97960.00160.0036), (B(tau- pi- nu(tau)))/(B(tau- e- nu(e) nu(tau))) = (0.59450.00140.0061), and (B(tau- K- nu(tau)))/(B(tau- e- nu(e) nu(tau))) = (0.038820.000320.00057), where the uncertainties are statistical and systematic, respectively. From these precision tau measurements, we test the standard model assumption of mu-e and tau-mu charge current lepton universality and provide determinations of |Vus| experimentally independent of the decay of a kaon.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/110099
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