Spontaneous breaking of parity or time reversal invariance offers a solution to the strong CP problem, the stability of which under quantum gravitational effects provides an upper limit on the scale of symmetry breaking. Even more important, these Planck scale effects may provide a simple and natural way out of the resulting domain wall problem. ∗Invited talk at the 4th Hellenic School on Eleme...

Excitation spectra ∆ET of T = 0, 1, 2 states in even-even (e-e) and odd-odd (o-o) N = Z nuclei are analyzed within a mean-field based model involving isovector and isoscalar pairing interactions and the iso-cranking formalism applied to restore approximately isospin symmetry. It is shown that T = 0 states in o-o and T = 1 states in e-e nuclei correspond to two-quasiparticle, time-reversal symme...

We estimate the effect of leptonic CP violating phases in the minimal seesaw model with two heavy neutrinos N by imposing the approximately μ− τ symmetry on the model. For N subject to the μ− τ symmetry, we find that neutrinos show the normal mass hierarchy and obtain the general phase structure that contains only two phases which arise from μ − τ symmetry breaking terms. To perform similar con...

2014 The problem of asymptotic-time symmetry breaking for a particle in a symmetric double-well, interacting with phonons, is formulated for a standard minimal two-site model and for initially asymmetric particle distribution and thermal but unrelaxed phonons. The timeconvolutionless Generalized Master Equations can be handled explicitly in the Born approximation. Formally extending the solutio...

Reversible computation is a great metaphor for the foundations of physics. General discussion A reversible computation is a computation which can be reversed completely. That is, after insertion of the input into a reversible computer, the reversible computer generates some output (if ever). In such a case one may run the entire computation backward by inserting the output as new input, thereby...

We consider the deformed Poincare group describing the space-time symmetry of noncommutative field theory. It is shown that the deformed symmetry is equivalent to explicit symmetry breaking. PACS number(s): 11.10-z, 11.30Cp

Xiancong Lu,1,2 Liviu Chioncel,3,4 and Enrico Arrigoni2 1Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005, China 2Institute of Theoretical and Computational Physics, Graz University of Technology, A-8010 Graz, Austria 3Augsburg Center for Innovative Technologies, University of Augsburg, D-86135 Augsburg, Germany 4Theoretical Physics I...

A sum rule similar to that of Fubini, Furlan and Rosse tti is used to show that the weak magnetic form-factor in strangeness changing semi-leptonic hyperon decays is renormalized to first order in the symmetry breaking Hamiltonian. This is in contrast to the Ademello-Gatto theorem which states that there is no such renormalization in the case of the strangeness changing charge form-factor. (Sub...

We consider (2, 0) theory on a space-time of the form R× T , where the first factor denotes time, and the second factor is a flat spatial five-torus. In addition to their energy, quantum states are characterized by their spatial momentum, ’t Hooft flux, and Sp(4) R-symmetry representation. The momentum obeys a shifted quantization law determined by the ’t Hooft flux. By supersymmetry, the energ...

Noncentral heavy ion collisions lead to the production of a quark gluon plasma with angular momentum. We investigate, using holographic AdS (anti--de Sitter)/QCD models, how does rotation medium affects confinement/deconfinement transition temperature ${T}_{c}$. In this is represented by Hawking-Page process involving two asymptotically spaces. The here extending approach anti--de Sitter spaces...