Quantum electrodynamics (QED) is built on the original Dirac equation, an equation that exhibits perfect symmetry in that it is symmetric under charge conjugation (C), space (P) and time (T) reversal and any combinati...Quantum electrodynamics (QED) is built on the original Dirac equation, an equation that exhibits perfect symmetry in that it is symmetric under charge conjugation (C), space (P) and time (T) reversal and any combination of these discrete symmetries. We demonstrate herein that while the proposed Lorentz invariant Curved Spacetime Dirac Equations (CSTD-equations) obey C, PT and CPT-symmetries, these equations readily violate P, T, CP and CT-symmetries. Realising this violation, namely the T and CT-violation, we take this opportunity to suggest that the Curved Spacetime Dirac Equations may help in solving the long standing riddle and mystery of the preponderance of matter over antimatter. We come to the tentative conclusion that if these CSTD-equations are to explain the preponderance of matter over antimatter;then, photons are to be thought of as described by the spherically curved version of this set of equations, while ordinary matter is to be explained by the parabolically and hyperbolically curved spacetime versions of this same set of equations.展开更多
Abstract Questions about detecting the CP-violating decay process of J/ψ→ K^0K^-0→ KsKs are discussed. Possible background and material regeneration effects are analyzed. The discussion can be directly extended to ...Abstract Questions about detecting the CP-violating decay process of J/ψ→ K^0K^-0→ KsKs are discussed. Possible background and material regeneration effects are analyzed. The discussion can be directly extended to other vector quarkonium decays, like γ, ψ（2S） and Ф → KsKs.展开更多
New physics field content in the nature, more specifically, from spin-1 resonances sourced by the extension of the SM local gauge symmetry to the larger local group SU(2)_LSU(2)_R U(1)_(B-L), may induce CP-violation s...New physics field content in the nature, more specifically, from spin-1 resonances sourced by the extension of the SM local gauge symmetry to the larger local group SU(2)_LSU(2)_R U(1)_(B-L), may induce CP-violation signalling NP effects from higher energy regimes. In this work we completely list and study all the CP-violating operators up to the p^4-order in the Lagrangian expansion, for a non-linear left-right electroweak chiral context and coupled to a light dynamical Higgs. Heavy right handed fields can be integrated out from the physical spectrum, inducing thus a physical impact in the effective gauge couplings, fermionic electric dipole moment, and CP-violation in the decay h→ ZZ*→4 l that are briefly analysed. The final relevant set of effective operators have also been identified at low energies.展开更多
We propose a simple set of hypotheses governing the deviations of the leptonic mapping matrix from the Harrison-Perkins-Scott （HPS） form. These deviations are supposed to arise entirely from a perturbation of the ma...We propose a simple set of hypotheses governing the deviations of the leptonic mapping matrix from the Harrison-Perkins-Scott （HPS） form. These deviations are supposed to arise entirely from a perturbation of the mass matrix in the charged lepton sector. The perturbing matrix is assumed to be purely imaginary （thus maximally T-violating） and to have a strength in energy scale no greater （but perhaps smaller） than the muon mass. As we shall show, it then follows that the absolute value of the mapping matrix elements pertaining to the tau lepton deviate by no more than O（（mμ/mτ）^2） ≈ 3.5 ×10^-3 from their HPS values. Assuming that （mμ/mτ）^2 can be neglected, we derive two simple constraints on the four parameters θ12,θ23, θ31, and δ of the mapping matrix. These constraints are independent of the details of the imaginary T-violating perturbation of the charged lepton mass matrix. We also show that the e and μ parts of the mapping matrix have a definite form governed by two parameters α and β; any deviation of order mμ/mτ can be accommodated by adjusting these two parameters.展开更多
We propose to understand the mixing angles and CP-violating phases from the A（48） family symmetry combined with the generalized CP symmetry. A model-independent analysis is performed by scanning all the possible sym...We propose to understand the mixing angles and CP-violating phases from the A（48） family symmetry combined with the generalized CP symmetry. A model-independent analysis is performed by scanning all the possible symmetry breaking chains. We find a new mixing pattern with only one free parameter, excellent agreement with the observed mixing angles can be achieved and all the CP-violating phases are predicted to take nontrivial values. This mixing pattern is testable in the near future neutrino oscillation and neutrinoless double-beta decay experiments. Finally, a flavor model is constructed to realize this mixing pattern.展开更多
The D^0-D^0 mixing at Belle in different modes with corresponding methods is reported in this paper, there is a clear evidence for non-zero y D^0 mixing parameter, and the measurement of D^0 mixing parameter x is stil...The D^0-D^0 mixing at Belle in different modes with corresponding methods is reported in this paper, there is a clear evidence for non-zero y D^0 mixing parameter, and the measurement of D^0 mixing parameter x is still a challenge. CP violation in the decays is not observed. Branching fractions of other charm decays are presented.展开更多
The nonleptonic two body Bu;d;s;c decays involving a light tensor meson in final states are studied in the perturbative QCD approach based on kTfactorization.The decay modes with a tensor meson emitted,are prohibited ...The nonleptonic two body Bu;d;s;c decays involving a light tensor meson in final states are studied in the perturbative QCD approach based on kTfactorization.The decay modes with a tensor meson emitted,are prohibited in naive factorization,since the emission diagram with a tensor meson produced from vacuum is vanished.While contributions from the so-called hard scattering emission diagrams and annihilation type diagrams are important and calculable in the perturbative QCD approach.The branching ratios of most decays are in the range of 10 4–10 8,which are bigger by 1 or 2 orders of magnitude than the predictions given by the naive factorization,but consistent with the predictions from the QCD factorization and the recent experimental measurements.We also give the predictions for the direct CP asymmetries,some of which are large enough for the future experiments to measure.We also find that,even with a small mixing angle,the mixing between f2and f02can bring remarkable changes to both branching ratios and the direct CP asymmetries for some decays involving fe0T2mesons.For decays with a vector meson and a tensor meson in final states,we predict a large percentage of transverse polarization contributions due to the contributions of the orbital angular momentum of the tensor mesons.展开更多
In this review we do not try to cover all the aspects of physics besnd tile standard model （BSM）, instead our latest understanding on tile BSM will be presented： i） Tile Higgs sector is likely related to BSM, whic...In this review we do not try to cover all the aspects of physics besnd tile standard model （BSM）, instead our latest understanding on tile BSM will be presented： i） Tile Higgs sector is likely related to BSM, which can be confirmed at current running large hadron collider （LHC） or tile fllture eolliders. Furthermore we pointed out that spontaneous CP violation can be closely related to the lightness of the Higgs boson, ii） Top quark forward-backward asymmetry, which was mea.sured by Tewttron, might be the sign of BSM.2; proposed a new color-octet particle Zcr to account fi）r the observation and Z can be fllrther studied at the LHC. iii） If dark matter （DM） is utilized to accommodate astrophysical obserwtions, it ought to be observed at the high energy LttC and DM produced at colliders should be tile slnoking gun signal, iv） Lithium puzzle might also be the sign of the BSM. We briefly review tile newly proposed solution to Lithium puzzle, i.e.. the existonce of non-thermal component during the big bang nuclei-synthesis （BBN）. The possible origins of the non-thermal coinponent can be dark matter or the new accelerating mechanism of normal particles.展开更多
文摘Quantum electrodynamics (QED) is built on the original Dirac equation, an equation that exhibits perfect symmetry in that it is symmetric under charge conjugation (C), space (P) and time (T) reversal and any combination of these discrete symmetries. We demonstrate herein that while the proposed Lorentz invariant Curved Spacetime Dirac Equations (CSTD-equations) obey C, PT and CPT-symmetries, these equations readily violate P, T, CP and CT-symmetries. Realising this violation, namely the T and CT-violation, we take this opportunity to suggest that the Curved Spacetime Dirac Equations may help in solving the long standing riddle and mystery of the preponderance of matter over antimatter. We come to the tentative conclusion that if these CSTD-equations are to explain the preponderance of matter over antimatter;then, photons are to be thought of as described by the spherically curved version of this set of equations, while ordinary matter is to be explained by the parabolically and hyperbolically curved spacetime versions of this same set of equations.
基金Supported by National Natural Science Foundation of China, Knowledge Innovation Project of CAS (U-530, U-612 (IHEP))
文摘Abstract Questions about detecting the CP-violating decay process of J/ψ→ K^0K^-0→ KsKs are discussed. Possible background and material regeneration effects are analyzed. The discussion can be directly extended to other vector quarkonium decays, like γ, ψ（2S） and Ф → KsKs.
基金Supported by KITPC financial during the completion of this work
文摘New physics field content in the nature, more specifically, from spin-1 resonances sourced by the extension of the SM local gauge symmetry to the larger local group SU(2)_LSU(2)_R U(1)_(B-L), may induce CP-violation signalling NP effects from higher energy regimes. In this work we completely list and study all the CP-violating operators up to the p^4-order in the Lagrangian expansion, for a non-linear left-right electroweak chiral context and coupled to a light dynamical Higgs. Heavy right handed fields can be integrated out from the physical spectrum, inducing thus a physical impact in the effective gauge couplings, fermionic electric dipole moment, and CP-violation in the decay h→ ZZ*→4 l that are briefly analysed. The final relevant set of effective operators have also been identified at low energies.
文摘We propose a simple set of hypotheses governing the deviations of the leptonic mapping matrix from the Harrison-Perkins-Scott （HPS） form. These deviations are supposed to arise entirely from a perturbation of the mass matrix in the charged lepton sector. The perturbing matrix is assumed to be purely imaginary （thus maximally T-violating） and to have a strength in energy scale no greater （but perhaps smaller） than the muon mass. As we shall show, it then follows that the absolute value of the mapping matrix elements pertaining to the tau lepton deviate by no more than O（（mμ/mτ）^2） ≈ 3.5 ×10^-3 from their HPS values. Assuming that （mμ/mτ）^2 can be neglected, we derive two simple constraints on the four parameters θ12,θ23, θ31, and δ of the mapping matrix. These constraints are independent of the details of the imaginary T-violating perturbation of the charged lepton mass matrix. We also show that the e and μ parts of the mapping matrix have a definite form governed by two parameters α and β; any deviation of order mμ/mτ can be accommodated by adjusting these two parameters.
基金Supported by National Natural Science Foundation of China(11275188,11179007,11135009)
文摘We propose to understand the mixing angles and CP-violating phases from the A（48） family symmetry combined with the generalized CP symmetry. A model-independent analysis is performed by scanning all the possible symmetry breaking chains. We find a new mixing pattern with only one free parameter, excellent agreement with the observed mixing angles can be achieved and all the CP-violating phases are predicted to take nontrivial values. This mixing pattern is testable in the near future neutrino oscillation and neutrinoless double-beta decay experiments. Finally, a flavor model is constructed to realize this mixing pattern.
基金Supported by National Natural Science Foundation of China (10935008,10875115)
文摘The D^0-D^0 mixing at Belle in different modes with corresponding methods is reported in this paper, there is a clear evidence for non-zero y D^0 mixing parameter, and the measurement of D^0 mixing parameter x is still a challenge. CP violation in the decays is not observed. Branching fractions of other charm decays are presented.
基金supported in part by the Foundation of Yantai University (WL07052)the National Natural Science Foundation of China (11375208,11228512,11235005 and 11175151)
文摘The nonleptonic two body Bu;d;s;c decays involving a light tensor meson in final states are studied in the perturbative QCD approach based on kTfactorization.The decay modes with a tensor meson emitted,are prohibited in naive factorization,since the emission diagram with a tensor meson produced from vacuum is vanished.While contributions from the so-called hard scattering emission diagrams and annihilation type diagrams are important and calculable in the perturbative QCD approach.The branching ratios of most decays are in the range of 10 4–10 8,which are bigger by 1 or 2 orders of magnitude than the predictions given by the naive factorization,but consistent with the predictions from the QCD factorization and the recent experimental measurements.We also give the predictions for the direct CP asymmetries,some of which are large enough for the future experiments to measure.We also find that,even with a small mixing angle,the mixing between f2and f02can bring remarkable changes to both branching ratios and the direct CP asymmetries for some decays involving fe0T2mesons.For decays with a vector meson and a tensor meson in final states,we predict a large percentage of transverse polarization contributions due to the contributions of the orbital angular momentum of the tensor mesons.
文摘In this review we do not try to cover all the aspects of physics besnd tile standard model （BSM）, instead our latest understanding on tile BSM will be presented： i） Tile Higgs sector is likely related to BSM, which can be confirmed at current running large hadron collider （LHC） or tile fllture eolliders. Furthermore we pointed out that spontaneous CP violation can be closely related to the lightness of the Higgs boson, ii） Top quark forward-backward asymmetry, which was mea.sured by Tewttron, might be the sign of BSM.2; proposed a new color-octet particle Zcr to account fi）r the observation and Z can be fllrther studied at the LHC. iii） If dark matter （DM） is utilized to accommodate astrophysical obserwtions, it ought to be observed at the high energy LttC and DM produced at colliders should be tile slnoking gun signal, iv） Lithium puzzle might also be the sign of the BSM. We briefly review tile newly proposed solution to Lithium puzzle, i.e.. the existonce of non-thermal component during the big bang nuclei-synthesis （BBN）. The possible origins of the non-thermal coinponent can be dark matter or the new accelerating mechanism of normal particles.
