Light vector meson and heavy baryon strong interaction

We calculate the coupling constants between the light vector mesons and heavy baryons within the framework of the light-cone QCD sum rule in the leading order of heavy quark effective theory. Most resulting sum rules are stable with the variations of the Borel parameter and the continuum threshold. The extracted couplings will be useful in the study of the possible heavy baryon molecular states

catena-Poly[[[diaquacadmium(II)]bis[μ-2-(pyridinium-1-yl)butanedioato]-κ2 O 1:O 4;κ2 O 4:O 1] tetrahydrate], a polymeric chain structure

In the title complex, {[Cd(C9H8NO4)2(H2O)2]·4H2O}n, the CdII atom (site symmetry 2) is coordinated by six O atoms from four crystallographically related 1-(1,2-dicarboxyl­ate)pyridin-1-ium ligands (L) and from two water molecules in a distorted octahedral geometry. Paired L ligands connect CdII atoms into a chain motif parallel to [001], which is further inter­linked by O—H⋯O hydrogen bonds into a three-dimensional supra­molecular net

Joint implications of BBN, CMB, and PTA Datasets for Scalar-Induced Gravitational Waves of Second and Third orders

Assuming the evidence for gravitational wave background from recent data release of pulsar timing arrays to be interpreted as the scalar-induced gravitational waves (SIGWs), we study the second and third order gravitational waves simultaneously, by jointly analyzing a combination of PTA, big-bang nucleosynthesis (BBN), and cosmic microwave background (CMB) datasets. We obtain the primordial curvature spectral amplitude $0.014<A_\zeta<0.058$ and the spectral peak frequency $10^{-7.4}\ \mathrm{Hz}<f_\ast<10^{-6.4}\ \mathrm{Hz}$at 95\% confidence level, indicating a mass range of primordial black holes (PBHs)$10^{-4.3}M_\odot<m_{\mathrm{pbh}}<10^{-2.3}M_\odot$. We further find that the third order gravitational waves have greater contributions to the integrated energy density than the second order gravitational waves when$A_\zeta\gtrsim0.06$. In addition, we anticipate that future PTA projects can not only test the above results, but also have powerful abilities to explore the origin and evolution of the universe, particularly, the inflation.Comment: 12 pages, 2 figure

2-Phenyl­imidazolium hemi(benzene-1,3-dicarboxyl­ate) monohydrate

The asymmetric unit of the title compound, C9H9N2 +·0.5C8H4O4 −·H2O, contains one 2-phenyl­imidazolium cation, half a benzene-1,3-dicarboxyl­ate anion and one water mol­ecule. In the crystal, components are connected by N—H⋯O and O—H⋯O hydrogen-bonding inter­actions into a three-dimensional network