Electromagnetic Decay of the ${\Sigma }^0(1385)$ to $\Lambda \gamma$

Abstract

The electromagnetic decay ${\Sigma }^0(1385)\to \Lambda \gamma$ was studied using the CLAS detector at the Thomas Jefferson National Accelerator Facility. A real photon beam with a maximum energy of 3.8 GeV was incident on a proton target, producing an exclusive final state of $K^{+}{\Sigma }^{\ast 0}$. We report the decay widths ratio ${\Sigma }^0(1385)\to \Lambda \gamma$/ ${\Sigma }^0(1385)\to \Lambda {\pi }^0$ = $1.42\pm 0.12(\text{stat}{)}_{-0.07}^{+0.11}(\text{sys})$%. This ratio is larger than most theoretical predictions by factors ranging from 1.5-3, but is consistent with the only other experimental measurement. From the reported ratio we calculate the partial width and electromagnetic transition magnetic moment for ${\Sigma }^0(1385)\to \Lambda \gamma$.

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Cited by in corpus (18)

• Baryons as relativistic three-quark bound states
• Baryonic resonances close to the Kbar-N threshold: the case of Sigma(1385)^+ in pp collisions
• Octet to decuplet electromagnetic transition in a relativistic quark model
• What is the role of the meson cloud in the ${\Sigma }^{\ast 0}\to \gamma \Lambda$ and ${\Sigma }^{\ast }\to \gamma \Sigma$ decays?
• Electromagnetic transition form factors of baryons in the space-like momentum region
• Vector meson dominance and radiative decays of heavy spin-3/2 baryons to heavy spin--1/2 baryons
• Hyperon elastic electromagnetic form factors in the space-like momentum region
• Octet Baryons in Large Magnetic Fields
• Baryon resonances in large $N_c$ QCD
• Baryon Magnetic Moments in the 1/N_c Expansion with Flavor Symmetry Breaking
• Baryon magnetic moments in large-N_c chiral perturbation theory: Effects of the decuplet-octet mass difference and flavor symmetry breaking
• Screening of quark charge and mixing effects on transition moments and M1 decay widths of baryons
• A covariant model for the decuplet to octet Dalitz decays
• The SU(3) Vector Currents in BChPT x 1/Nc
• Meson cloud contributions to the Dalitz decays of decuplet to octet baryons
• Baryon magnetic moment in large-$N_c$ chiral perturbation theory: Complete analysis for $N_c=3$
• Electromagnetic and weak decays of baryons in the unquenched quark model
• Studies on photo- and electro-productions of $\Lambda (1405)$ via ${\gamma }^{(\ast )}p\to K^{\ast +}{\pi }^0{\Sigma }^0$