SO(10) unified models and soft leptogenesis

Motivated by the fact that, in some realistic models combining SO(10) GUTs and flavour symmetries, it is not possible to achieve the required baryon asymmetry through the CP asymmetry generated in the decay of right-handed neutrinos, we take a fresh look on how deep this connection is in SO(10). The common characteristics of these models are that they use the see-saw with right-handed neutrinos, predict a normal hierarchy of masses for the neutrinos observed in oscillating experiments and in the basis where the right-handed Majorana mass is diagonal, the charged lepton mixings are tiny. In addition these models link the up-quark Yukawa matrix to the neutrino Yukawa matrix Y^\nu with the special feature of Y^\nu_{11}-> 0 Using this condition, we find that the required baryon asymmetry of the Universe can be explained by the soft leptogenesis using the soft B parameter of the second lightest right-handed neutrino whose mass turns out to be around 10^8 GeV. It is pointed out that a natural way to do so is to use no-scale supergravity where the value of B ~1 GeV is set through gauge-loop corrections.Comment: 26 pages, 2 figures. Added references, new appendix of a relevant fit and improved comment

Seed morphology and genome size in two Tuscan (Crocus, Iridaceae) endemics: C. etruscus and C. ilvensis

Recent taxonomic investigation led to the segregation of Crocus ilvensis Peruzzi & Carta, a narrow endemic to Elba Island (Tuscan Archipelago, Central Italy), from C. etruscus Parl., endemic to continental Tuscany. The aim of this study is to produce further basic systematic data aimed comparing these taxa by means of seed morphological features and genome size. Although seed macro-morphology is very similar, seed surface microstructure, seed mass, seed dimensions and genome size differ between the two studied specie

Association of high HLA-E expression during acute cellular rejection and numbers of HLA class I leader peptide mismatches with reduced renal allograft survival

Transplantation and autoimmunit