학술논문
Measurement of Inverse Pion Photoproduction at Energies Spanning the N(1440) Resonance
Document Type
Working Paper
Author
Shafi, A.; Prakhov, S.; Strakovsky, I. I.; Briscoe, W. J.; Nefkens, B. M. K.; Allgower, C. E.; Arndt, R. A.; Bekrenev, V.; Bennhold, C.; Clajus, M.; Comfort, J. R.; Craig, K.; Grosnick, D.; Isenhower, D.; Knecht, N.; Koetke, D. D.; Kulbardis, A.; Kozlenko, N.; Kruglov, S.; Lolos, G.; Lopatin, I.; Manley, D. M.; Manweiler, R.; Marusic, A.; McDonald, S.; Olmsted, J.; Papandreou, Z.; Peaslee, D.; Phaisangittisaku, N.; Price, J. W.; Ramirez, A. F.; Sadler, M.; Spinka, H.; Stanislaus, T. D. S.; Starostin, A.; Staudenmaier, H. M.; Supek, I.; Tippens, W. B.; Workman, R. L.
Source
Phys.Rev.C70:035204,2004
Subject
Language
Abstract
Differential cross sections for the process pi^- p -> gamma n have been measured at Brookhaven National Laboratory's Alternating Gradient Synchrotron with the Crystal Ball multiphoton spectrometer. Measurements were made at 18 pion momenta from 238 to 748 MeV/c, corresponding to E_gamma for the inverse reaction from 285 to 769 MeV. The data have been used to evaluate the gamma n multipoles in the vicinity of the N(1440) resonance. We compare our data and multipoles to previous determinations. A new three-parameter SAID fit yields 36 +/- 7 (GeV)^-1/2 X 10^-3 for the A^n_1/2 amplitude of the P_11.
Comment: 14 pages, 8 figures, submitted to PRC
Comment: 14 pages, 8 figures, submitted to PRC