Partial wave analysis of the reaction {gamma}p{yields}p{omega} and the search for nucleon resonances

Williams, M; Applegate, D; Bellis, M; Meyer, C A; Dey, B; Dickson, R; Krahn, Z; McCracken, M E; Moriya, K; Schumacher, R A; Adhikari, K P; Careccia, S L; Dodge, G E; Guler, N; Klein, A; Mayer, M; Nepali, C S; Niroula, M R; Seraydaryan, H; Tkachenko, S

doi:10.1103/PHYSREVC.80.065209

Partial wave analysis of the reaction {gamma}p{yields}p{omega} and the search for nucleon resonances

Journal Article · Tue Dec 15 04:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.065209· OSTI ID:21296630

Williams, M; Applegate, D; Bellis, M; Meyer, C A; Dey, B; Dickson, R; Krahn, Z; McCracken, M E; Moriya, K; Schumacher, R A ^[1]; Adhikari, K P; Careccia, S L; Dodge, G E; Guler, N; Klein, A; Mayer, M; Nepali, C S; Niroula, M R; Seraydaryan, H; Tkachenko, S ^[2]

Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)
Old Dominion University, Norfolk, Virginia 23529 (United States)

An event-based partial wave analysis (PWA) of the reaction {gamma}p{yields}p{omega} has been performed on a high-statistics dataset obtained using the CLAS at Jefferson Lab for center-of-mass energies from threshold up to 2.4 GeV. This analysis benefits from access to the world's first high-precision spin-density matrix element measurements, available to the event-based PWA through the decay distribution of {omega}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0}. The data confirm the dominance of the t-channel {pi}{sup 0} exchange amplitude in the forward direction. The dominant resonance contributions are consistent with the previously identified states F{sub 15}(1680) and D{sub 13}(1700) near threshold, as well as the G{sub 17}(2190) at higher energies. Suggestive evidence for the presence of a J{sup P}=5/2{sup +} state around 2 GeV, a ''missing'' state, has also been found. Evidence for other states is inconclusive.

OSTI ID:: 21296630

Journal Information:: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 80; ISSN 0556-2813; ISSN PRVCAN

Country of Publication:: United States

Language:: English

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