منابع مشابه
Seasonal and energy dependence of solar neutrino vacuum oscillations
We make a global vacuum neutrino oscillation analysis of solar neutrino data, including the seasonal and energy dependence of the recent Super–Kamiokande 708day results. The best fit parameters for νe oscillations to an active neutrino are δm = 4.42 × 10 eV, sin 2θ = 0.93. The allowed mixing angle region is consistent with bi–maximal mixing of three neutrinos. Oscillations to a sterile neutrino...
متن کاملDependence of the vacuum energy on spherically symmetric background fields
The vacuum energy of a scalar field in a spherically symmetric background field is considered. Based on previous work [Phys. Rev. D 53 (1996) 5753], the numerical procedure is refined further and applied to several examples. We provide numerical evidence that repulsive potentials lead to positive contributions to the vacuum energy. Furthermore, the crucial role played by bound-states is clearly...
متن کاملMass Dependence of Quantum Energy Inequality Bounds
In a recent paper [J. Math. Phys. 47 082303 (2006)], Quantum Energy Inequalities were used to place simple geometrical bounds on the energy densities of quantum fields in Minkowskian spacetime regions. Here, we refine this analysis for massive fields, obtaining more stringent bounds which decay exponentially in the mass. At the technical level this involves the determination of the asymptotic b...
متن کاملOn Topological Susceptibility, Vacuum Energy and Theta Dependence in Gluodynamics
We suggest that the topological susceptibility in gluodynamics can be found in terms of the gluon condensate using renormalizability and heavy fermion representation of the anomaly. Analogous relations can be also obtained for other zero momentum correlation functions involving the topological density operator. Using these relations, we find the θ dependence of the condensates 〈GG〉, 〈GG̃〉 and of...
متن کاملThe 2ppi Expansion: Dynamical Mass Generation and Vacuum Energy *
LTH–601 We discuss the 2P P I expansion, a summation of the bubble graphs up to all orders, by means of the 2D Gross-Neveu toy model, whose exact mass gap and vacuum energy are known. Then we use the expansion to give analytical evidence that a dimension two gluon condensate exists for pure Yang-Mills in the Landau gauge. This A a µ A a µ condensate consequently gives rise to a dynamical gluon ...
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: Physics Letters B
سال: 2005
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2005.08.040