The mass limits shown below apply to a Higgs boson ${{\mathit H}^{0}}$ with Standard Model couplings whose mass is a priori unknown.

For limits obtained before the direct measurement of the top quark mass, see the 1996 (Physical Review D54 1 (1996)) Edition of this Review. Other studies based on data available prior to 1996 can be found in the 1998 Edition (The European Physical Journal C3 1 (1998)) of this Review.

VALUE (GeV) DOCUMENT ID TECN $\bf{90 {}^{+21}_{-18}}$ 1 HALLER 2018 RVUE • • We do not use the following data for averages, fits, limits, etc. • • $91$ ${}^{+30}_{-23}$ 2 BAAK 2012 RVUE $94$ ${}^{+25}_{-22}$ 3 BAAK 2012 A RVUE $91$ ${}^{+31}_{-24}$ 4 ERLER 2010 A RVUE $129$ ${}^{+74}_{-49}$ 5 LEP-SLC 2006 RVUE 1  HALLER 2018 make Standard Model fits to ${{\mathit Z}}$ and neutral current parameters, ${\mathit m}_{{{\mathit t}}}$, ${\mathit m}_{{{\mathit W}}}$, and ${\Gamma}_{{\mathit W}}$ measurements available in 2018. The direct mass measurement at the LHC is not used in the fit. 2  BAAK 2012 make Standard Model fits to ${{\mathit Z}}$ and neutral current parameters, ${\mathit m}_{{{\mathit t}}}$, ${\mathit m}_{{{\mathit W}}}$, and ${\Gamma}_{{\mathit W}}$ measurements available in 2010 (using also preliminary data). The quoted result is obtained from a fit that does not include the limit from the direct Higgs searches. The result including direct search data from LEP2, the Tevatron and the LHC is $120$ ${}^{+12}_{-5}$ GeV. 3  BAAK 2012A make Standard Model fits to ${{\mathit Z}}$ and neutral current parameters, ${\mathit m}_{{{\mathit t}}}$, ${\mathit m}_{{{\mathit W}}}$, and ${\Gamma}_{{\mathit W}}$ measurements available in 2012 (using also preliminary data). The quoted result is obtained from a fit that does not include the measured mass value of the signal observed at the LHC and also no limits from direct Higgs searches. 4  ERLER 2010A makes Standard Model fits to ${{\mathit Z}}$ and neutral current parameters, ${\mathit m}_{{{\mathit t}}}$, ${\mathit m}_{{{\mathit W}}}$ measurements available in 2009 (using also preliminary data). The quoted result is obtained from a fit that does not include the limits from the direct Higgs searches. With direct search data from LEP2 and Tevatron added to the fit, the 90$\%$ CL (99$\%$ CL) interval is $115 - 148$ ($114 - 197$) GeV. 5  LEP-SLC 2006 make Standard Model fits to ${{\mathit Z}}$ parameters from LEP/SLC and ${\mathit m}_{{{\mathit t}}}$, ${\mathit m}_{{{\mathit W}}}$, and $\Gamma _{W}$ measurements available in 2005 with $\Delta \alpha {}^{(5)}_{{\mathrm {had}}}({\mathit m}_{{{\mathit Z}}}$) = $0.02758$ $\pm0.00035$. The 95$\%$ CL limit is 285 GeV.

References:

HALLER 2018 EPJ C78 675 Update of the global electroweak fit and constraints on two-Higgs-doublet models BAAK 2012 EPJ C72 2003 Updated Status of the Global Electroweak Fit and Constraints on New Physics BAAK 2012A EPJ C72 2205 The Electroweak Fit of the Standard Model After the Discovery of a New Boson at the LHC ERLER 2010A PR D81 051301 Mass of the Higgs Boson in the Standard Electroweak Model LEP-SLC 2006 PRPL 427 257 Precision Electroweak Measurements on the ${{\mathit Z}}$ Resonance