The masses of the flavor octet and singlet baryons with negative parity and spin 1 2 are calculated using the QCD sum rule. We find that the chiral symmetry breaking vacuum condensates cause the mass splitting of the positive and negative baryons. The present sum rule reproduces the observed masses of these baryons within 10%, and predicts the mass of the excited Ξ baryon with J P = 1 2 − at 1....

We study the following problem. Given a multiset $M$ of non-negative integers, decide whether there exist and, in positive case, compute two non-trivial multisets whose Minkowski sum is equal to $M$. The A and B containing all possible sums any element B. This problem was proved be NP-complete when are replaced by sets. version strictly related factorization boolean polynomials that turns out a...

A (p,q) graph G is said to admit n order triangular sum labeling if its vertices can be labeled by non negative integers such that the induced edge labels obtained by the sum of the labels of end vertices are the first q n order triangular numbers. A graph G which admits n order triangular sum labeling is called n order triangular sum graph. In this paper we prove that paths, combs, stars, subd...