Towards the ultimate SM fit to close in on Higgs physics
By A. Pomarol, F. Riva. 2013
214 citations recorded by the source corpus.
A bstractWith the discovery of the Higgs at the LHC, experiments have finally addressed all aspects of the Standard Model (SM). At this stage, it is important to understand which windows for beyond the SM (BSM) physics are still open, and which are instead tightly closed. We address this question by parametrizing BSM effects with dimension-six operators and performing a global fit to the SM. We separate operators into different groups constrained at different levels, and provide independent bounds on their Wilson coefficients taking into account only the relevant experiments. Our analysis allows to assert in a model-independent way where BSM effects can appear in Higgs physics. In particular, we show that deviations from the SM in the differential distributions of $ h\ \to\ V\overline{f}f $ are related to other observables, such as triple gauge-boson couplings, and are then already constrained by present data. On the contrary, BR(h → Zγ) can still hide large deviations from the SM.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/207228de082620426cf179c48c05292cbbe5b916
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Nuclear and High Energy Physics
Citations in the corpus
- Measurements of Higgs boson properties in the diphoton decay channel with 36 fb$^{-1}$ of $pp$ collision data at $\sqrt{s} = 13$ TeV with the ATLAS detector (2018, unknown): “Higgs boson production via VBF is generated at NLO accuracy in QCD using the Powheg-Box program [35–38] with the PDF4LHC15 PDF set.”
- The effective Standard Model after LHC Run I (2014, methodology): “Following [88], we may eliminate the operators OLL ,O (3) LL that affect the left-handed leptonic Z couplings, and the operators O2W ,O2B,O2G corresponding to the Y,W and Z parameters [101, 102] in the generalization of the universal oblique parameters.”
- Electroweak constraints on flavorful effective theories (2015, methodology): “For example, including the LEP-2 WW production data breaks the degeneracy and allows one to separately constrain cHf , cWB, and cT [7, 16].”
- Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC (2014, background): “However, if significant deviations from the SM are found from the analysis, a more careful investigation of anomalous Higgs couplings [82–84] becomes necessary, including a detailed study of their effects on the efficiencies.”
- Model-independent precision constraints on dimension-6 operators (2014, background): “[7] made a first step in this direction and included the leading order in the MFV expansion.”
- Renormalization group evolution of the Standard Model dimension six operators III: gauge coupling dependence and phenomenology (2013, methodology): “[57] which are stated as broad, model-independent, conclusions.”
- How to use the Standard Model effective field theory (2014, background): “Popular operator bases constructed along this line include the “EGGM basis” [25], the “HISZ basis” [62], and the “SILH basis” [24, 35, 63].”