The Research Of The Decay Of The μ Lepton Flavor Changing And The Anomalous Magnetic Moment

Since the Standard Model(SM) was proposed in the 1960s by Glashow, Salam, and Weinberg, it has been proved to be a remarkably successful description of high energy physics phenomena.However,as time goes on, we found that the standard model is not perfect. First of all,the Higgs in SM has never been found and in SM the light Higgs responsible for electro weak symmetry breaking leads to "fine-tuning problem".On the other hand,with the continuous development of experimental techniques,many of the experimental results of neutrinos and dark matter are directly in contradiction with the related theories of SM.The measurements of atmospheric and solar neutrino fluxes have provided evidence for neutrino oscillations and therefore for nondegenerate neu-trino masses and mixing [1,2].The large or even maximal mixing angles measured in solar and atmospheric neutrinos should in principle allow the detection of lepton fla-vor violating effects in the charged lepton sector, e.g., the observation of the muon decay,μ→eγ.So there is a good deal of new physics beyond the standard model[3].In order to explain the quality of neutrino,theoretical physicists have put forward many theories beyond the SM. Among these theories,the so-called seesaw mechanism[4,5] still appears to be the most appealing and natural mechanism of neutrino mass gener-ation.However,the theory has a big flaw that the masses of the neutrino are related to the existence of a much higher scale∧～1014-15 GeV,rendering the new states exper-imentally inaccessible in the foreseeable future.The Large Hadron Collider (LHC)[6] at CERN coming online in 2009 will soon take us an unprecedented opportunity for exploring new physics at the TeV scale. So exploring new mechanisms to generate neutrino mass become a very important task for us.Recently, Hung has suggested a model of new physics [7].Therefore we investigate here the possibility to test the mechanisms for neutrino mass generation at the LHC by researching and analyzing the Hung model.He extended standard model (SM) by introducing new particles in Hung model: Mirror fermions charged under SM gauge group, of which right-handed neutrinos are a member, and two Higgs triplets in a way that preserves the p parameter to unity, plus a Higgs singlet.The right-handed neutrinos are required to have a mass (from the vac-uum expectation value (VEV) of the triplet Higgs) not exceeding the electroweak scale, while the neutrino Dirac mass (from singlet Higgs VEV) is unrelated to the electroweak scale.In this model,we study the correlation decay ofμ, and the corresponding decay width and branching ratios and numerical discussion.In particular we also calculate the amplitude for the decayμ→eγand the anomalous magnetic moment forμin Rξgauge. It is conceivable that these new leptons could be discovered at high energy colliders in the near future, while the rich lepton flavor structure could be observed in low energy processes.