scholarly journals Electroweak precision data and the Lee-Wick standard model

2009 ◽  
Vol 79 (3) ◽  
Author(s):  
Thomas E. J. Underwood ◽  
Roman Zwicky
Keyword(s):  
Standard Model ◽  
Precision Data ◽  
Electroweak Precision ◽  
Electroweak Precision Data

scholarly journals Correlation between the decays h0 → γγ/gg in the MSSM with quark flavor violation

2019 ◽  
Vol 34 (22) ◽  
pp. 1950120
Author(s):  
H. Eberl ◽  
K. Hidaka ◽  
E. Ginina
Keyword(s):  
Standard Model ◽  
Width Ratio ◽  
Strongly Correlated ◽  
Relative Deviation ◽  
Precision Data ◽  
Flavor Violation ◽  
Quark Flavor ◽  
Fixed Reference ◽  
Electroweak Precision ◽  
Electroweak Precision Data

We study the loop-induced decays [Formula: see text] and [Formula: see text] in the Minimal Supersymmetric Standard Model (MSSM) with quark flavor violation (QFV), identifying [Formula: see text] with the Higgs boson with a mass of 125 GeV, where [Formula: see text] and [Formula: see text] are photon and gluon, respectively. We perform a MSSM parameter scan and a detailed analysis around a fixed reference point respecting theoretical constraints from vacuum stability conditions and experimental constraints, such as those from [Formula: see text]-meson data and electroweak precision data, as well as recent limits on Supersymmetric (SUSY) particle masses from LHC experiments. We find that (i) the relative deviation of the decay width [Formula: see text] from the Standard Model value, [Formula: see text], can be large and negative, [Formula: see text], (ii) the analogous deviation of [Formula: see text] is strongly correlated, [Formula: see text] for [Formula: see text], (iii) the relative deviation of the width ratio [Formula: see text] from the SM value, [Formula: see text], can be large (up to [Formula: see text]20%), (iv) the deviations can be large due to the up-type squark loop contributions, (v) the SUSY QFV parameters can have a significant effect on these deviations. Such large deviations can be observed at a future [Formula: see text] collider like ILC. Observation of the deviation patterns as shown in this study would favor the MSSM with flavor-violating squark mixings and encourage to perform further studies in this model.

scholarly journals Dimension-8 operators in the Standard Model Effective Field Theory

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Christopher W. Murphy
Keyword(s):  
Field Theory ◽  
Light Scattering ◽  
Standard Model ◽  
Effective Field Theory ◽  
Effective Field ◽  
Precision Data ◽  
Complete Basis ◽  
The Standard Model ◽  
Electroweak Precision ◽  
Electroweak Precision Data

Abstract We present a complete basis of dimension-8 operators in the Standard Model Effective Field Theory. Attention is paid to operators that vanish in the absence of flavor structure. The 44,807 operators are encoded in 1,031 Lagrangian terms. We also briefly discuss a few aspects of phenomenology involving dimension-8 operators, including light-by-light scattering and electroweak precision data.

scholarly journals Extra generations and discrepancies of electroweak precision data

2002 ◽  
Vol 529 (1-2) ◽  
pp. 111-116 ◽  
Author(s):  
V.A. Novikov ◽  
L.B. Okun ◽  
A.N. Rozanov ◽  
M.I. Vysotsky
Keyword(s):  
Precision Data ◽  
Electroweak Precision ◽  
Electroweak Precision Data

scholarly journals Refined analysis of the electroweak precision data

1995 ◽  
Vol 448 (1-2) ◽  
pp. 3-29 ◽  
Author(s):  
S. Dittmaier ◽  
D. Schildknecht ◽  
M. Kuroda
Keyword(s):  
Precision Data ◽  
Electroweak Precision ◽  
Electroweak Precision Data

scholarly journals Improved constraints onZ′ bosons from electroweak precision data

2009 ◽  
Vol 2009 (08) ◽  
pp. 017-017 ◽  
Author(s):  
Jens Erler ◽  
Paul Langacker ◽  
Shoaib Munir ◽  
Eduardo Rojas
Keyword(s):  
Precision Data ◽  
Electroweak Precision ◽  
Electroweak Precision Data
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