Measurement of {tau} decays with the spectrometer ARGUS
- Jozef Stefan Institute, Ljubljana (Slovenia)
Using the ARGUS detector at the {ital e}{sup +}{ital e}{sup {minus}} storage ring DORIS II at DESY, we have studied lepton energy spectra in {tau} decays. We present a ``pseudo-rest-frame`` technique in which the second {tau} in the event, decaying into a heavy hadronic system, is used as reference. This method allows for the first measurement of the Michel Parameter {eta} in {tau} decays. We also determine the Michel Parameter {rho} in {tau}{r_arrow}{ital e}{bar {nu}}{nu} decays with a precision comparable to the present world average. The measured values of the parameters {rho}=0.735{plus_minus}0.036{plus_minus}0.020 and {eta}=0.03{plus_minus}0.18{plus_minus}0.12 are in good agreement with standard V-A coupling at the {tau}-{nu}-W vertex. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 165562
- Report Number(s):
- CONF-940514-; ISSN 0094-243X; TRN: 96:002229
- Journal Information:
- AIP Conference Proceedings, Vol. 338, Issue 1; Conference: 5. conference on intersections between particle and nuclear physics, St. Petersburg, FL (United States), 31 May - 6 Jun 1994; Other Information: PBD: 10 Jul 1995
- Country of Publication:
- United States
- Language:
- English
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