scholarly journals The minimal supersymmetric standard model and electroweak precision data

1993 ◽  
Vol 314 (3-4) ◽  
pp. 357-363 ◽  
Author(s):  
Guido Altarelli ◽  
Riccardo Barbieri ◽  
Francesco Caravaglios
2019 ◽  
Vol 34 (22) ◽  
pp. 1950120
Author(s):  
H. Eberl ◽  
K. Hidaka ◽  
E. Ginina

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.


2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Christopher W. Murphy

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.


2011 ◽  
Vol 126 (6) ◽  
pp. 1051-1076 ◽  
Author(s):  
Y. Kanehata ◽  
T. Kobayashi ◽  
Y. Konishi ◽  
O. Seto ◽  
T. Shimomura

1998 ◽  
Vol 13 (14) ◽  
pp. 2263-2276 ◽  
Author(s):  
HOWARD E. HABER

The theoretical structure of the Higgs sector of the Minimal Supersymmetric Standard Model (MSSM) is briefly described. An outline of Higgs phenomenology at future lepton colliders is presented, and some opportunities for probing the physics of the MSSM Higgs sector at an e-e- collider are considered.


Sign in / Sign up

Export Citation Format

Share Document