High-precision measurement of the left-right Z Boson cross-section asymmetry

The SLD Collaboration

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78 Citations (Scopus)

Abstract

We present a measurement of the left-right cross-section asymmetry (ALR) for Z boson production by e+e collisions. The measurement includes the final data taken with the SLD detector at the SLAC Linear Collider during the period 1996–1998. Using a sample of 383487 decays collected during the 1996–1998 runs we measure the pole value of the asymmetry, ALR0, to be 0.15056 ± 0.00239 which is equivalent to an effective weak mixing angle of sin2 θeffW = 0.23107 ± 0.00030. Our result for the complete 1992–1998 data set comprising approximately 537 000 Z decays is sin2 θeffW = 0.23097 ± 0.00027.

Original languageEnglish
Pages (from-to)5945-5949
Number of pages5
JournalPhysical review letters
Volume84
Issue number26
DOIs
Publication statusPublished - 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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