IR-improved Soft-wall AdS/QCD Model for Baryons

We construct an infrared-improved soft-wall AdS/QCD model for baryons by considering the infrared-modified 5D conformal mass and Yukawa coupling of the bulk baryon field. The model is also built by taking into account the parity-doublet pattern for the excited baryons. When taking the bulk vacuum structure of the meson field to be the one obtained consistently in the infrared-improved soft-wall AdS/QCD model for mesons, we arrive at a consistent prediction for the baryon mass spectrum in even and odd parity. The prediction shows a remarkable agreement with the experimental data. We also perform a calculation for the $\rho(a_1)$ meson-nucleon coupling constant and obtain a consistent result in comparison with the experimental data and many other models.Comment: 12 pages, 4 tables, 1 figure, to be published in PL

Bis(μ-pyridine-2,4-dicarboxyl­ato)-κ3 N,O 2:O 2;κ3 O 2:N,O 2-bis­[triaqua­magnesium(II)]

In the title centrosymmetric MgII complex, [Mg2(C7H3NO4)2(H2O)6], each Mg cation is N,O-chelated by a pyridine-2,4-dicarboxyl­ate dianion and is coordinated by three water mol­ecules. A carboxyl­ate O atom from the neighboring pyridine-2,4-dicarboxyl­ate dianion bridges the Mg cation to complete the MgNO5 distorted octa­hedral coordination geometry. The dinuclear complex mol­ecules are linked by inter­molecular O—H⋯O hydrogen bonding, forming a three-dimensional supra­molecular structure