The standard model(SM)of particle physics has been surprsingly successful in explaining fundamental interactions,yet it leaves many key problems unsolved,including such as the origin of CP violation,the origin of matt...The standard model(SM)of particle physics has been surprsingly successful in explaining fundamental interactions,yet it leaves many key problems unsolved,including such as the origin of CP violation,the origin of matter-antimatter asymmetry in the Universe[1-3],the anomalous magnetic and electric dipole moments of the tau lepton[4,5],as well as a possible neutrionless doubleβdecay process[6-10],etc.The new physics beyond the SM can be systematically formulated via the SM effective field theory(SMEFT)[11]in terms of gauge-invariant effective operators having mass-dimensions higher than four.The neutral triple gauge boson couplings(nTGCs)[12-22]describe interactions among neutral electroweak gauge bosons(Z,γ).They are absent both in the SM and at the level of dimension-6 effective operators of the SMEFT,but can first appear as the dimension-8 effective operators,providing a distinctive window for new physics beyond the SM.展开更多
文摘The standard model(SM)of particle physics has been surprsingly successful in explaining fundamental interactions,yet it leaves many key problems unsolved,including such as the origin of CP violation,the origin of matter-antimatter asymmetry in the Universe[1-3],the anomalous magnetic and electric dipole moments of the tau lepton[4,5],as well as a possible neutrionless doubleβdecay process[6-10],etc.The new physics beyond the SM can be systematically formulated via the SM effective field theory(SMEFT)[11]in terms of gauge-invariant effective operators having mass-dimensions higher than four.The neutral triple gauge boson couplings(nTGCs)[12-22]describe interactions among neutral electroweak gauge bosons(Z,γ).They are absent both in the SM and at the level of dimension-6 effective operators of the SMEFT,but can first appear as the dimension-8 effective operators,providing a distinctive window for new physics beyond the SM.
