Naslov
Measurement of K- p radiative capture to gamma Lambda and gamma Sigma0 for p(K-) between 514 and 750 MeV/c

Autori
Prakhov, S. ; Vancraeyveld, P. ; Phaisangittisakul, B.M.K. ; Nefkens, B.M.K. ; Allgower, C.E. ; Bekrenev, V. ; Briscoe, Isenhower, D. ; W.J. ; Knecht, N. ; Koulbardis, A. ; Kozlenko, N. ; Kruglov, S. ; Lolos, G. ; Lopatin, I. ; Manley, D.M. ; Marušić, Aljoša ; McDonald, S. ; Olmsted, J. ; Papandreou, Z. ; Paeslee, D. ; Price, J.W. ; Rykebusch, J. ; Sadler, M. ; Schafi, A. ; Starostin, A. ; Staudenmaier, H.M. ; Starkovsky, I.I. ; Supek, Ivan ; Van Cauteren, T.

Izvornik
Physical Review C (0556-2813) 82 (2010); 015201-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
radiative capture

Sažetak
Differential cross sections for K- radiative capture in flight on the proton, leading to the γΛ and γΣ0 final states, have been measured at eight K- momenta between 514 and 750 MeV/c. The data were obtained with the Crystal Ball multiphoton spectrometer installed at the separated K/π beam line C6 of the BNL Alternating Gradient Synchrotron. The results substantially improve the existing experimental data available for studying radiative decays of excited hyperon states. An exploratory theoretical analysis is performed within the Regge-plus-resonance approach. According to this analysis, the γΣ0 final state is dominated by hyperon-resonance exchange and hints at an important role for a resonance in the mass region of 1700 MeV. In the γΛ final state, in contrast, the resonant contributions account for only half the strength, and the data suggest the importance of a resonance in the mass region of 1550 MeV.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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