Ke Hong-Wei

Constraining parameter space of the little Higgs model using data from tera-Z factory and ILC *

The Standard Model (SM) prediction on the forward-backward asymmetry for b production (AbFB)is well consistent with the data of LEP I at the Z-pole, but deviates from the data at √s = 89.55 and 92.95 GeV which are slightly away from the pole. This deviation implies that there is still room for new physics. We calculate the AbFB at the vicinity of the Z-pole in the little Higgs model as well as other measurable parameters such as Rb and Rc, by which we may constrain the parameter space of the little Higgs model. This can be further tested in the newly proposed tera-Z factory. With the fitted parameters we further make predictions on AbFB and AtFB for t production at the International Linear Collider (ILC).

Testing Bell inequality at experiments of high energy physics

Besides using the laser beam, it is very tempting to directly testify the Bell inequality at high energy experiments where the spin correlation is exactly what the original Bell inequality investigates. In this work, we follow the proposal raised in literature and use the successive decays J/ψ → γηc → ΛΛ̄ → pπ −p̄π+ to testify the Bell inequality. Our goal is twofold, namely, we first make a Monte-Carlo simulation of the processes based on the quantum field theory (QFT). Since the underlying theory is QFT, it implies that we pre-admit the validity of quantum picture. Even though the QFT is true, we need to find how big the database should be, so that we can clearly show deviations of the correlation from the Bell inequality determined by the local hidden variable theory. There have been some critiques on the proposed method, so in the second part, we suggest some improvements which may help to remedy the ambiguities indicated by the critiques. It may be realized at an updated facility of high energy physics, such as BES III.Besides using the laser beam, it is very tempting to directly testify the Bell inequality at high energy experiments where the spin correlation is exactly what the original Bell inequality investigates. In this work, we follow the proposal raised in literature and use the successive decays J/ψ → γηc → Λ → pπ−π+ to testify the Bell inequality. Our goal is twofold, namely, we first make a Monte–Carlo simulation of the processes based on the quantum field theory (QFT). Since the underlying theory is QFT, it implies that we pre-admit the validity of quantum picture. Even though the QFT is true, we need to find how big the database should be, so that we can clearly show deviations of the correlation from the Bell inequality determined by the local hidden variable theory. There have been some critiques on the proposed method, so in the second part, we suggest some improvements which may help to remedy the ambiguities indicated by the critiques. It may be realized at an updated facility of high energy physics, such as BES III.

An Underlying Symmetry Determines all Elements of CKM and PMNS up to a Universal Constant

Hong-Wei Keand Xue-Qian Li 1 School of Science, Tianjin University, Tianjin 300072, China 2 School of Physics, Nankai University, Tianjin 300071, China Abstract Observing the CKM matrix elements written in different parametrization schemes, one can notice obvious relations among the sine-values of the CP phases in those schemes. Using the relations, we establish a few parametrization-independent equations, by which the matrix elements of the CKM matrix can be completely fixed up to a universal parameter. If it is true, we expect that there should exist a hidden symmetry in the nature which determines the relations. Moreover, it requires a universal parameter, naturally it would be the famous Jarlskog invariant which is also parametrization independent. Thus the four parameters (three mixing angles and one CP phase) of the CKM matrix are not free, but determined by the symmetry and the universal parameter. As we generalize the rules to the PMNS matrix for neutrino mixing, the CP phase of the lepton sector is predicted to be within a range of 0 ∼ 59◦ centered at 39◦ (in the Pa parametrization) which will be tested in the future experiments.Observing the CKM matrix elements written in different parametrization schemes, one can notice obvious relations among the sine-values of the CP phases in those schemes. Using the relations, we establish a few parametrization-independent equations, by which the matrix elements of the CKM matrix can be completely fixed up to a universal parameter. If it is true, we expect that there should exist a hidden symmetry in the nature, which determines the relations. Moreover, it requires a universal parameter, naturally it would be the famous Jarlskog invariant, which is also parametrization independent. Thus the four parameters (three mixing angles and one CP phase) of the CKM matrix are not free, but determined by the symmetry and the universal parameter. As we generalize the rules to the PMNS matrix for neutrino mixing, the CP phase of the lepton sector is predicted to be within a range of 0 ~ 59° centered at 39° (in the Pa parametrization) which will be tested in the future experiments.

Re-study of the contribution of scalar potential and spectra of cc̄, bb̄ and bc̄(b̄c) families

We indicated in our previous work that for QED the role of the scalar potential which appears at the loop level is much smaller than that of the vector potential and is in fact negligible. But the situation is different for QCD, one reason is that the loop effects are more significant because αs is much larger than α, and second the non-perturbative QCD effects may induce a sizable scalar potential. In this work, we study phenomenologically the contribution of the scalar potential to the spectra of charmonia, bottomonia and b(c) families. Taking into account both vector and scalar potentials, by fitting the well measured charmonia and bottomonia spectra, we re-fix the relevant parameters and test them by calculating other states of not only the charmonia and bottomonia families, but also the b family. We also consider the Lamb shift of the spectra.

The Decay Rate of J/ψ to Λ c +øverlineΣ + in and beyond the Standard Model

With rapid growth of the database of the BES III and the proposed super flavor factory, measurement on the rare

The Decay Rate of J/ψ to Λc + in and beyond the Standard Model

\psi(2S)

Phenomenological study on the significance of the scalar potential and Lamb shift

decays may be feasible, especially the weak decays into baryon final states. In this work we study the decay rate of

Evaluating decay rates and asymmetries of {lambda}{sub b} into light baryons in the light-front quark model

\psi(2S)

Interpretation of the “ f D s puzzle” in the standard model and beyond

to

Searching for new physics in D0→μ+μ−, e+e−, μ±e∓ at BES and/or the super charm-tau factory

\Lambda_c+\overline{\Sigma^+}