Measurement of the Higgs boson coupling properties in the $H\rightarrow ZZ^{*} \rightarrow 4\ell$ decay channel at $\sqrt{s}$ = 13 TeV with the ATLAS detector

The theoretical predictions in the standard model (SM) and measurements on the anomalous magnetic dipole moments (MDM) of muon and electron have great precision, hence the MDMs of muon and electron have close relation with the new physics (NP) beyond the SM. Recently, a negative ∼ 2.4σ discrepancy between the measured electron MDM and the SM prediction results from a recent improved determination of the fine structure constant. Combined with the longlasting muon MDM discrepancy which is about ∼ 3.7σ, it is difficult to explain both the magnitude and opposite signs of the deviations in a consistent model, without introducing large flavourviolating effects. The analysis shows that they can be explained in the minimal supersymmetric extension (MSSM) of the SM with local B − L gauge symmetry (B-LSSM). Comparing with the MSSM, new parameters in the B-LSSM can affect the theoretical predictions on lepton MDMs, and the effects of them are explored. PACS numbers:

show abstract

“…And for Higgs decays, we adopt the averages of the results from PDG which reads [114][115][116][117][118][119][120][121][122] µ exp γγ = 1.11…”

Section: Numerical Analysesmentioning

confidence: 99%

Electron and muon (g − 2) in the B-LSSM

Yang

Feng

Zhang

2020

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

show abstract

“…The rate of the Higgs decay into two Z bosons has been measured by the ATLAS and CMS experiments [7,8]. Within present experimental accuracy, it has the value that corresponds to the strength of interaction that would give the Z boson its mass, and via that would limit the effects of Z-mediated weak interaction to short range.…”

Section: A Second Jewel: Why the Weak Interaction Is Short-rangementioning

confidence: 99%

The three jewels in the crown of the LHC

Nir

2020

Preprint

View full text Add to dashboard Cite

The ATLAS and CMS experiments have made three major discoveries: The discovery of an elementary spin-zero particle, the discovery of the mechanism that makes the weak interactions short-range, and the discovery of the mechanism that gives the third generation fermions their masses. I explain how this progress in our understanding of the basic laws of Nature was achieved.It is often stated that the Higgs discovery is "the jewel in the crown" of the ATLAS/CMS research. We would like to argue that ATLAS/CMS made (at least) three major discoveries, each of deep significance to our understanding of the basic laws of Nature:1. The discovery of an elementary spin-0 particle, the first and only particle of this type to have been discovered.2. The discovery of the mechanism that makes the weak interactions short-ranged, in contrast to the other (electromagnetic and strong) interactions mediated by spin-1 particles.3. The discovery of the mechanism that gives masses to the three heaviest matter (spin-1/2) particles, through a unique type of interactions.These three breakthrough discoveries can be related, in one-to-one correspondence, to three distinct classes of measurements:1. The Higgs boson decay into two photons.2. The Higgs boson decay into a W -or a Z-boson and a fermion pair, and the Higgs production via vector boson (W W or ZZ) fusion.3. The Higgs boson decay into fermion pairs, and the Higgs boson production in association with top-antitop pair.

show abstract

“…Each channel of discovered Higgs has already been detected by CMS and ATLAS experiment groups. The decay signal strengths of Higgs to ZZ bosons and b b pair are given in Table 1, independently by CMS [21,22], AT-LAS [23,24]. Due to the detectors' limits and the defects of hardron collider, the data in Table 1 may deviate from the real results, especially in H → b b.…”

Section: Alrm Effects In Higgs Decaymentioning

confidence: 99%

“…It is worth mentioning that the parameters λ 3 , α 12 and M H ± 2 are not sensitive in the numerical results, only 0 < λ 3 < √ 4π and α 12 > 0, to be consistent with the perturbative unitarity and the minimization and boundedness from below conditions Eqs. (21)(22)(23)(24) in ref. [19].…”

Section: Alrm Effects In Higgs Decaymentioning

confidence: 99%

HZ associated production with decay in the Alternative Left-Right Model at CEPC and future linear colliders

2018

View full text Add to dashboard Cite

In this study, Higgs and Z boson associated production with subsequent decay is attempted in the framework of alternative left-right model, which is motivated by superstring-inspired E6 model at CEPC and future linear colliders. We systematically analyze each decay channel of Higgs with theoretical constraints and latest experimental methods. Due to the mixing of scalars in the Higgs sector, charged Higgs bosons can play an essential role in the phenomenological analysis of this process. Even though the predictions of this model for the signal strengths of this process are close to the standard model expectations, it can be distinct under high luminosity.

show abstract

Measurement of the Higgs boson coupling properties in the $H\rightarrow ZZ^{*} \rightarrow 4\ell$ decay channel at $\sqrt{s}$ = 13 TeV with the ATLAS detector

Cited by 20 publications

References 0 publications

Electron and muon (g − 2) in the B-LSSM

Electron and muon (g − 2) in the B-LSSM

The three jewels in the crown of the LHC

HZ associated production with decay in the Alternative Left-Right Model at CEPC and future linear colliders

Contact Info

Product

Resources

About