19 research outputs found
Family nonuniversal Z-prime and b to s Gamma decay
We have calculated the branching ratio and CP asymmetry of B-->X_s +gamma
decay within the family--nonuniversal Z' models. We have established certain
bounds on the model parameters using the present experimental bounds. We also
comment on the role of family--nonuniversality in the hadronic decay modes of
the B meson.Comment: 15 pages, 2 figure
The effect of supersymmetric CP phases on Chargino-Pair Production via Drell-Yan Process at the LHC
We compute the rates for pp annihilation into chargino-pairs via Drell-Yan
process taking into account the effects of supersymmetric soft phases, at
proton-proton collider. In particular, the phase of the mu parameter gains
direct accessibility via the production of dissimilar charginos. The phases of
the trilinear soft masses do not have a significant effect on the cross
sections.Comment: 24 pages, 7 figure
Bounds on the dipole moments of the tau-neutrino via the process in a 331 model
We obtain limits on the anomalous magnetic and electric dipole moments of the
through the reaction
and in the framework of a 331 model. We consider initial-state radiation, and
neglect and photon exchange diagrams. The results are based on the data
reported by the L3 Collaboration at LEP, and compare favorably with the limits
obtained in other models, complementing previous studies on the dipole moments.Comment: 13 pages, 4 figures, to be published in The European Physical J C.
arXiv admin note: substantial text overlap with arXiv:hep-ph/060527
Inborn errors of OAS-RNase L in SARS-CoV-2-related multisystem inflammatory syndrome in children
Multisystem inflammatory syndrome in children (MIS-C) is a rare and severe condition that follows benign COVID-19. We report autosomal recessive deficiencies of OAS1, OAS2, or RNASEL in five unrelated children with MIS-C. The cytosolic double-stranded RNA (dsRNA)-sensing OAS1 and OAS2 generate 2'-5'-linked oligoadenylates (2-5A) that activate the single-stranded RNA-degrading ribonuclease L (RNase L). Monocytic cell lines and primary myeloid cells with OAS1, OAS2, or RNase L deficiencies produce excessive amounts of inflammatory cytokines upon dsRNA or severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) stimulation. Exogenous 2-5A suppresses cytokine production in OAS1-deficient but not RNase L-deficient cells. Cytokine production in RNase L-deficient cells is impaired by MDA5 or RIG-I deficiency and abolished by mitochondrial antiviral-signaling protein (MAVS) deficiency. Recessive OAS-RNase L deficiencies in these patients unleash the production of SARS-CoV-2-triggered, MAVS-mediated inflammatory cytokines by mononuclear phagocytes, thereby underlying MIS-C
The Effect of Supersymmetric CP Phases on qq-bar Annihilations
We compute the rates for annihilation into charginos and neutralinos by taking into account the effects of supersymmetric soft phases. In particular, the phase of the parameter gains direct accessibility via the production of dissimilar charginos and neutralinos. The phases of the trilinear soft masses do not have a significant effect on the cross sections. Our results can be important for sparticle searches at the LHC
The effect of treatment time on dimensionally stability, moisture content and mechanical properties of heat treated anatolian chestnut (Castanea sativa Mill.) wood
In this study, the effect of treatment time on dimensional stability, moisture content, and mechanical properties of heat-treated Anatolian chestnut (Castanea sativa Mill.) were investigated. Test specimens were subjected to a temperature of 180°C at atmospheric pressure for five different treatment times (2, 4, 6, 8, and 12 hours). After the heat treatment of the specimens was completed, their moisture contents at relative humidity (RH) conditions of 45, 55, 65, 80, and 95%, their dimensional stabilities, their mechanical properties, e.g., bending strength, modulus of elasticity, and compression strength, were determined. The data obtained were analyzed using variance analysis, and then the statistical analysis of Tukey's test was conducted. The results showed that heat treatment resulted in decreased (i.e., improved) moisture content, enhanced dimensional stability, and reductions of the mechanical properties. The decrease of mechanical properties that resulted from the 12-hour test was greater than the reductions observed for the tests that lasted 2, 4, 6, and 8 hours