Direct Measurement of the Neutral Weak Dipole Moments of the tau Lepton
We present direct measurements of the neutral weak anomalous magnetic dipole moment, a{sub {tau}}{sup w}, and neutral weak electric dipole moment, d{sub {tau}}{sup w}, of the tau lepton. The dipole moments are measured by analyzing the decays of {tau} leptons produced in the annihilation of positrons and longitudinally polarized electrons on the Z boson resonance at the SLC. Using 6736 Z decays to {tau}{sup +} {tau}{sup {minus}} pairs elected from our 1993-1998 data sample we obtain Re(a{sub {tau}}{sup w}) = (0.26 {+-} 1.24) x 10{sup {minus}3}, Im(a{sub {tau}}{sup w}) = ({minus}0.02 {+-} 0.66) x 10{sup {minus}3}, Re(d{sub {tau}}{sup w}) = (0.18 {+-} 0.67) x 10 {sup {minus}17} e {center_dot} cm, and Im(D{sub {tau}}{sup w}) = ({minus}0.26 {+-} 0.37) x 10{sup {minus}17} e {center_dot} cm.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 10091
- Report Number(s):
- SLAC-PUB-8163; TRN: US0103353
- Resource Relation:
- Other Information: PBD: 16 Jul 1999
- Country of Publication:
- United States
- Language:
- English
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