We report a measurement of two energy-weighted γ cascade angular distributions from polarized slow neutron capture on the Cl35 nucleus, one parity-odd correlation proportional to sn⃗·kγ⃗ and parity-even sn⃗·kn⃗×kγ⃗. A parity-violating asymmetry can appear in this reaction due weak nucleon-nucleon interaction, which mixes opposite parity S- P-wave levels excited compound Cl36 nucleus formed upon capt...

We derive a strong bound on the axion-photon coupling g(aγ) from the analysis of a sample of 39 Galactic Globular Clusters. As recognized long ago, the R parameter, i.e., the number ratio of stars in horizontal over red giant branch of old stellar clusters, would be reduced by the axion production from photon conversions occurring in stellar cores. In this regard, we have compared the measured ...

where the first uncertainty is statistical and the second systematic. This represents a significant improvement in precision over the previous measurement of this parameter. Measurements of the parameter AΓ, defined as the CP asymmetry of the D0 effective lifetime when decaying to a CP eigenstate, are also presented. Using semi-leptonic b-hadron decays to tag the flavour of the D0 meson at prod...

Natural deletions of the human β-globin gene cluster lead to specific syndromes characterized by increased production of fetal hemoglobin in adult life and provide a useful model to delineate novel cis-acting elements involved in the developmental control of hemoglobin switching. A hypothesis accounting for these phenotypic features, assumes that silencers located within the Aγ to δ-gene region...

Retinoic acid (RA), a hormonal signal derived from vitamin A (retinol), is essential in vertebrates for controlling processes involved in embryonic patterning and organogenesis, cell proliferation, differentiation and apoptosis, and homeostasis (Sporn et al., 1994; Blomhoff, 1994; Chambon, 1996). RA levels are controlled locally, through the combined action of retinaldehyde dehydrogenases (RALD...

We show that every right-angled Artin group AΓ defined by a graph Γ of finite chromatic number is poly-free with poly-free length bounded between the clique number and the chromatic number of Γ. Further, a characterization of all right-angled Artin groups of poly-free length 2 is given, namely the group AΓ has poly-free length 2 if and only if there exists an independent set of vertices D in Γ ...

Let Γ be a quiver on n vertices v1, v2, . . . , vn with gij edges between vi and vj , and let α ∈ Nn. Hua gave a formula for AΓ(α, q), the number of isomorphism classes of absolutely indecomposable representations of Γ over the finite field Fq with dimension vector α. Kac showed that AΓ(α, q) is a polynomial in q with integer coefficients. Using Hua’s formula, we show that for each integer s ≥ ...

Abstract We calculate parity nonconserving observables in the processes where a neutron is captured on a proton at the threshold energy radiating a photon. Various potential models such as Paris, Bonn and Argonne v18 are used for the strong interactions, and the meson-exchange description is employed for the weak interactions between hadrons. The photon polarization Pγ in the unpolarized neutro...

We provide a homological algebraic realization of the lattices integer cuts and flows graphs. To finite 2-edge-connected graph Γ with spanning tree T, we associate dimensional Koszul algebra AΓ,T. Under construction, planar dual graphs trees are associated algebras. The Grothendieck group category finitely-generated AΓ,T modules is isomorphic to Euclidean lattice ZE(Γ), describe sublattices on ...