Electromagnetic Radiation of Baryons Containing Two Heavy Quarks
نویسندگان
چکیده
The two heavy quarks in a baryon which contains two heavy quarks and a light one, can constitute a scalar or axial vector diquark. We study electromagnetic radiations of such baryons, (i) Ξ(bc)1 → Ξ(bc)0 + γ, (ii) Ξ∗(bc)1 → Ξ(bc)0 + γ, (iii) Ξ ∗∗ (bc)0 (1/2, l = 1) → Ξ(bc)0 + γ, (iv) Ξ∗∗ (bc)0(3/2, l = 1) → Ξ(bc)0 + γ and (v) Ξ ∗∗ (bc)0 (3/2, l = 2) → Ξ(bc)0 + γ, where Ξ(bc)0(1) ,Ξ ∗ (bc)1 are S-wave bound states of a heavy scalar or axial vector diquark and a light quark, and Ξ∗∗ (bc)0(l ≥ 1) are Por D-wave bound states of a heavy scalar diquark and a light quark. Analysis indicates that these processes can be attributed into two categories and the physical mechanisms which are responsible for them are completely distinct. Measurements can provide a good judgment for the diquark structure and better understanding of the physical picture. PACS numbers: 12.39.Hg, 11.10.St, 13.40.Hq, 13.30.-a
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