In certain new physics (NP) models, such as the Littlest Higgs model with T-parity, a strict correlation between the KL → π0νν̄ and K+ → π+νν̄ branching ratios has been observed, allowing essentially only for two branches of possible points, while in other NP frameworks, such as the general MSSM or warped extra dimensional models, no visible correlation appears. We analyse the origin of the corre...

In 2002, a method has been proposed by Buchholz et al. in the context of Local Quantum Physics, to characterize states that are locally in thermodynamic equilibrium. It could be shown for the model of massless bosons that these states exhibit quite interesting properties. The mean phase-space density satisfies a transport equation, and many of these states break time reversal symmetry. Moreover...

In this paper I draw the distinction between intuitive and theory-relative accounts of the time reversal symmetry and identify problems with each. I then propose an alternative to these two types of accounts that steers a middle course between them and minimizes each account’s problems. This new account of time reversal requires that, when dealing with sets of physical theories that satisfy cer...

It is an easily deduced fact that any four-component spin 1/2 state for a massive particle is a linear combination of pairs of two-component simultaneous rotation eigenstates, where ‘simultaneous’ means the eigenspinors of a given pair share the same eigenvalue. The new work here constructs the reverse: Given pairs of simultaneous rotation eigenvectors, the properties of these pairs contains re...

We establish sufficient conditions for the appearance of both apparent horizons and singularities in spherically symmetric initial data when spacetime is foliated extrinsically. Let M and P be respectively the total material energy and the total material current contained in some ball of radius `. Suppose that the dominant energy condition is satisfied. We show that if M − P ≥ ` then the region...

D e f i n i t i o n 6. Let T = (S, R, L, Act, so) be an LTS. A function h : S -4 S is a selection function if and only if there exists a bisimulation relation B C S • S between T and T such that; For all s e S , 8 h(8) s B s' implies that h(s) = h(s') We say that h preserves the bisimulation relation B. Intuitively, the function h picks a representative from each equivalence class of S induced ...

Maxwell’s equations admit both retarded and advanced solutions, but only the retarded solutions seem to characterize the radiative phenomena that actually occur in nature. The reason for this, however, is not usually explained in electrodynamics textbooks. We justify the use of the retarded solutions by considering a simple toy model, which allows us to avoid the technical complexities of elect...

where s is the particle’s spin, sz its third component, and an irrelevant phase has been omitted. An important point, with far-reaching consequences, is that T maps “in” states into “out” states: T : |in〉 → |out〉. In what follows, we shall discuss the rôle that TR plays in the transverse spin structure of hadrons . Before entering into the subject, it is worth recalling that the implementation ...