The Radiative Δ(1600) → <i>γN</i> Decay in the Light-Cone QCD Sum Rules

Within the framework of the light-cone QCD sum rules method (LCSR’s), the radiative <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>Δ</mo><mo>(</mo><mn>1600</mn><mo>)</mo><mo>→</mo><mi>γ</mi><mi>N</mi></mrow></semantics></math></inline-formula> decay is studied. In particular, the magnetic dipole moment <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>G</mi><mi>M</mi><mn>1</mn></msubsup><mrow><mo>(</mo><mn>0</mn><mo>)</mo></mrow></mrow></semantics></math></inline-formula> and the electric quadrupole moment <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>G</mi><mi>E</mi><mn>1</mn></msubsup><mrow><mo>(</mo><mn>0</mn><mo>)</mo></mrow></mrow></semantics></math></inline-formula> are estimated. We also calculate the ratio <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>R</mi><mrow><mi>E</mi><mi>M</mi></mrow></msub><mo>=</mo><mo>−</mo><mfrac><mrow><msubsup><mi>G</mi><mi>E</mi><mn>1</mn></msubsup><mrow><mo>(</mo><mn>0</mn><mo>)</mo></mrow></mrow><mrow><msubsup><mi>G</mi><mi>M</mi><mn>1</mn></msubsup><mrow><mo>(</mo><mn>0</mn><mo>)</mo></mrow></mrow></mfrac></mrow></semantics></math></inline-formula> and the decay rate. The predicted multipole moments and the decay rate strongly agree with the existing experimental results as well as with the other available phenomenological approaches.