GW190814: Circumstantial evidence for up-down quark star

Up Quark Masses from Down Quark Masses

The quark and charged lepton masses and the angles and phase of the CKM mixing matrix are nicely reproduced in a model which assumes O(3) ⊗ O(3) flavour symmetry broken by the v.e.v.’s of fields in its bi-fundamental representation. The relations among the quark mass eigenvalues, mu/mc ≈ mc/mt ≈ m2d/m2s ≈ m2s/m2b ≈ Λ2GUT/M2 Pl, follow from the broken flavour symmetry. Large tanβ is required whi...

Identification by circumstantial evidence

The assumedly mortal remains of Queen Editha (Eadgyth) (91o–946 AD), wife of Otto the Great (912–973 AD) were subject of identification. The aim of the multi disciplinary investigations of an international research team was to test the hypothesis that the coffin indeed contained the skeletal remains of Queen Editha, as an inscription on its lid states. Biographical data of the historic Editha h...

Hierarchy and Up-Down Parallelism of Quark Mass Matrices

In view of the quark mass hierarchy and in the assumption of the up-down parallelism, we derive two phenomenologically-favored patterns of Hermitian quark mass matrices from the quark flavor mixing matrix. We compare one of them with two existing Ansätze proposed by Rosner and Worah and by Roberts et al, and find that only the latter is consistent with the present experimental data. PACS number...

Circumstantial Evidence: Of Law, Literature, and Culture

Circumstantial-evidence-based Judgment for Software Effort Estimation

Expert judgment for software effort estimation is oriented toward direct evidences that refer to actual effort of similar projects or activities through experts’ experiences. However, the availability of direct evidences implies the requirement of suitable experts together with past data. The circumstantial-evidence-based judgment proposed in this paper focuses on the development experiences de...