Fermion production despite fermion number conservation
نویسندگان
چکیده
منابع مشابه
Fermion production despite fermion number conservation
Lattice proposals for a nonperturbative formulation of the Standard Model easily lead to a global U(1) symmetry corresponding to exactly conserved fermion number. The absence of an anomaly in the fermion current would then appear to inhibit anomalous processes, such as electroweak baryogenesis in the early universe. One way to circumvent this problem is to formulate the theory such that this U(...
متن کاملFermion number non-conservation and gravity
It is shown that in the Einstein-Yang-Mills (EYM) theory, as well as in the pure flat space Yang-Mills (YM) theory, there always exists an opportunity to pass over the potential barrier separating homotopically distinct vacuum sectors, because the barrier height may be arbitrarily small. However, at low energies all the overbarrier histories are suppressed by the destructive interference. In th...
متن کاملFermion Number Fractionization
Solitons emerge as non-perturbative solutions of non-linear wave equations in classical and quantun theories. These are non-dispersive and localised packets of energy-remarkable properties for solutions of non-linear differential equations. In presence of such objects, the solutions of Dirac equation lead to the curious phenomenon of ‘fractional fermion number’, a number which under normal cond...
متن کاملAnomalous fermion number non-conservation on the lattice
The anomaly for the fermion number current is calculated on the lattice in a simple prototype model with an even number of fermion doublets.
متن کاملEinstein-Yang-Mills sphalerons and fermion number non-conservation
It is argued that the sphaleron solutions appearing in the Einstein-YangMills theory are important in the transition processes at extremely high energies. Namely, when the energy exceeds the sphaleron mass, the existence of these solutions ensures constructive interference on the set of the overbarrier transition histories interpolating between distinct topological sectors of the theory. This h...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1995
ISSN: 0550-3213
DOI: 10.1016/0550-3213(94)00546-q