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The W-boson mass and precision tests of the Standard Model

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Zeitschrift für Physik C Particles and Fields

Abstract

We have examined the electroweak radiative corrections in the LEP precision data in view of the new measurements of M W and m t as well as the recent progress in the higher order radiative corrections. From the minimal χ2-fit to the experimental Z-decay parameters (with the aid of a modified ZFITTER program), we predict that M W= 80.29(4)(2) GeV where the first error is due to the uncertainty in the fitted to, for a fixed m H and the second error comes from the m H in the range 60–1000 GeV, which is to be compared with the current world average M W = 80.23(18) GeV. The current world average value of M W and the 1994 LEP data definitely favor nonvanishing electroweak radiative corrections and are consistent with a heavy m t as measured by the recent CDF report but with a heavy Higgs scalar of about 400 GeV within the context of the minimal standard model. The sensitivity of and the errors in the best fit solutions due to the uncertainties in the gluonic coupling αs(MZ) and α(MZ) are also studied carefully. In addition we discuss how the future precision measurements of M W can provide a decisive test for the standard model with radiative corrections and give a profound implication for the measurement of t-quark and Higgs masses.

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Authors and Affiliations

  1. Department of Physics, Brown University, Providence, RI, 02912, USA

    Kyungsik Kang

  2. Department of Physics, Seoul National University, Seoul, Korea

    Sin Kyu Kang

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  1. Kyungsik Kang
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  2. Sin Kyu Kang
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Additional information

Supported in part by the USDOE contract DE-FG02-91ER40688-Task A

Supported in part by the Basic Science Research Institute program, Ministry of Education, 1994, Project No.BSRI-94-2418, and the Korea Science and Engineering Foundation through SNU CTP

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Kang, K., Kang, S.K. The W-boson mass and precision tests of the Standard Model. Z Phys C - Particles and Fields 70, 239–245 (1996). https://doi.org/10.1007/s002880050101

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