There are situations in which some order restrictions are assumed about the parameters of the underlying distribution. Order restrictions may be provided by either prior information about the parameters or the mathematical structure of the problem. Such restrictions may enable us to improve on usual estimation procedures. Methods for improving have been investigated by Cohen and Sackrowiz (1970...

We review the spectrum of all baryons with the mass less than approximately 2000-2200 MeV using methods based on the approximate flavor SU(3) symmetry of the strong interaction. The application of the Gell-Mann–Okubo mass formulas and SU(3)-symmetric predictions for two-body hadronic decays allows us to successfully catalogue almost all known baryons in twenty-one SU(3) multiplets. In order to ...

We investigate the behaviour of the nuclear forces as a function of the light quark masses (or, equivalently, pion mass) in the framework of chiral effective field theory at next-to-leading order. The nucleon–nucleon force is described in terms of one and two–pion exchange and local short distance operators, which depend explicitly and implicitly on the quark masses. The pion propagator becomes...

Although immunodominance of CD8(+) T-cell responses is a well-recognised feature of viral infections, its role in responses to more antigenically complex pathogens is less clear. In previous studies we have observed that CD8(+) T-cell responses to Theileria parva exhibit different patterns of parasite strain specificity in cattle of different MHC genotypes. In the current study, we demonstrated...

Nucleon–nucleon (NN) forces from chiral perturbation theory at next–to–leading (NLO) and next– to–next–to–leading order (NNLO) are applied to systems with two, three and four nucleons. At NNLO, we consider two versions of the chiral potential which differ in the strength of the two– pion–exchange (TPE) but describe two nucleon observables equally well. The NNLO potential leads to unphysical dee...