Production and decay properties of the ωπ0 state at 1250 MeV/c2 produced by 20-GeV polarized photons on hydrogen

SLAC Hybrid Facility Photon Collaboration

doi:10.1103/PhysRevD.37.2379

Production and decay properties of the ωπ0 state at 1250 MeV/c2 produced by 20-GeV polarized photons on hydrogen

SLAC Hybrid Facility Photon Collaboration

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

The low-mass ωπ⁰ enhancement in γp- pω° has been of considerable interest in the past due to its suggested vector nature and possible role in the spectroscopy of the p-meson radial recurrences. Wc have measured the properties of this photoproduccd ωπ⁰ system using the SLAC Hybrid Facility. The experimental data consists of 306 785 usable hadronic events for which excellent γ-ray detection is provided by the large lead-glass array located behind the bubble-chamber. The photon beam had a 52% polarization. We have examined in detail the angular distributions of the 274 events from the reaction yp-p Pωπ0 The angular distribution of the production plane relative to the polarization vector shows a structure inconsistent with an s-channel helicity-conserving process. Wc have extracted the moments of the decay angular distribution. Our data favors a 5(1235) interpretation of the wr state over a vector-meson interpretation.

Original language	English (US)
Pages (from-to)	2379-2390
Number of pages	12
Journal	Physical Review D
Volume	37
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevD.37.2379
State	Published - 1988
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevD.37.2379

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@article{46cd3a55107e4946b11f084fcfd819c7,

title = "Production and decay properties of the ωπ0 state at 1250 MeV/c2 produced by 20-GeV polarized photons on hydrogen",

abstract = "The low-mass ωπ0 enhancement in γp- pω° has been of considerable interest in the past due to its suggested vector nature and possible role in the spectroscopy of the p-meson radial recurrences. Wc have measured the properties of this photoproduccd ωπ0 system using the SLAC Hybrid Facility. The experimental data consists of 306 785 usable hadronic events for which excellent γ-ray detection is provided by the large lead-glass array located behind the bubble-chamber. The photon beam had a 52% polarization. We have examined in detail the angular distributions of the 274 events from the reaction yp-p Pωπ0 The angular distribution of the production plane relative to the polarization vector shows a structure inconsistent with an s-channel helicity-conserving process. Wc have extracted the moments of the decay angular distribution. Our data favors a 5(1235) interpretation of the wr state over a vector-meson interpretation.",

author = "{SLAC Hybrid Facility Photon Collaboration} and Brau, {J. E.} and B. Franek and W. Wester and K. Abe and Bacon, {T. C.} and J. Ballam and Bingham, {H. H.} and K. Braune and D. Brick and Bugg, {W. M.} and Butler, {J. M.} and W. Cameron and Carroll, {J. T.} and Cautis, {C. V.} and Cohn, {H. O.} and Colley, {D. C.} and Condo, {G. T.} and S. Dado and R. Diamond and P. Dingus and R. Erickson and T. Fieguth and Field, {R. C.} and L. Fortney and B. Franek and N. Fujiwara and R. Gearhart and T. Glanzman and Godfrey, {I. M.} and Goldberg, {J. J.} and Goshaw, {A. T.} and G. Hall and Hancock, {E. R.} and T. Handler and Hargis, {H. J.} and Hart, {E. L.} and Harwin, {M. J.} and K. Hasegawa and Hulsizer, {R. I.} and M. Jobes and T. Kafka and Kalmus, {G. E.} and Kelsey, {D. P.} and J. Kent and T. Kitagaki and A. Levy and Mann, {W. A.} and R. Merenyi and R. Milburn and P. Ranking",

note = "Publisher Copyright: {\textcopyright} 1988 The American Physical Society.",

year = "1988",

doi = "10.1103/PhysRevD.37.2379",

language = "English (US)",

volume = "37",

pages = "2379--2390",

journal = "Physical Review D",

issn = "0556-2821",

publisher = "American Institute of Physics Publising LLC",

number = "9",

}

TY - JOUR

T1 - Production and decay properties of the ωπ0 state at 1250 MeV/c2 produced by 20-GeV polarized photons on hydrogen

AU - SLAC Hybrid Facility Photon Collaboration

AU - Brau, J. E.

AU - Franek, B.

AU - Wester, W.

AU - Abe, K.

AU - Bacon, T. C.

AU - Ballam, J.

AU - Bingham, H. H.

AU - Braune, K.

AU - Brick, D.

AU - Bugg, W. M.

AU - Butler, J. M.

AU - Cameron, W.

AU - Carroll, J. T.

AU - Cautis, C. V.

AU - Cohn, H. O.

AU - Colley, D. C.

AU - Condo, G. T.

AU - Dado, S.

AU - Diamond, R.

AU - Dingus, P.

AU - Erickson, R.

AU - Fieguth, T.

AU - Field, R. C.

AU - Fortney, L.

AU - Franek, B.

AU - Fujiwara, N.

AU - Gearhart, R.

AU - Glanzman, T.

AU - Godfrey, I. M.

AU - Goldberg, J. J.

AU - Goshaw, A. T.

AU - Hall, G.

AU - Hancock, E. R.

AU - Handler, T.

AU - Hargis, H. J.

AU - Hart, E. L.

AU - Harwin, M. J.

AU - Hasegawa, K.

AU - Hulsizer, R. I.

AU - Jobes, M.

AU - Kafka, T.

AU - Kalmus, G. E.

AU - Kelsey, D. P.

AU - Kent, J.

AU - Kitagaki, T.

AU - Levy, A.

AU - Mann, W. A.

AU - Merenyi, R.

AU - Milburn, R.

AU - Ranking, P.

PY - 1988

Y1 - 1988

N2 - The low-mass ωπ0 enhancement in γp- pω° has been of considerable interest in the past due to its suggested vector nature and possible role in the spectroscopy of the p-meson radial recurrences. Wc have measured the properties of this photoproduccd ωπ0 system using the SLAC Hybrid Facility. The experimental data consists of 306 785 usable hadronic events for which excellent γ-ray detection is provided by the large lead-glass array located behind the bubble-chamber. The photon beam had a 52% polarization. We have examined in detail the angular distributions of the 274 events from the reaction yp-p Pωπ0 The angular distribution of the production plane relative to the polarization vector shows a structure inconsistent with an s-channel helicity-conserving process. Wc have extracted the moments of the decay angular distribution. Our data favors a 5(1235) interpretation of the wr state over a vector-meson interpretation.

AB - The low-mass ωπ0 enhancement in γp- pω° has been of considerable interest in the past due to its suggested vector nature and possible role in the spectroscopy of the p-meson radial recurrences. Wc have measured the properties of this photoproduccd ωπ0 system using the SLAC Hybrid Facility. The experimental data consists of 306 785 usable hadronic events for which excellent γ-ray detection is provided by the large lead-glass array located behind the bubble-chamber. The photon beam had a 52% polarization. We have examined in detail the angular distributions of the 274 events from the reaction yp-p Pωπ0 The angular distribution of the production plane relative to the polarization vector shows a structure inconsistent with an s-channel helicity-conserving process. Wc have extracted the moments of the decay angular distribution. Our data favors a 5(1235) interpretation of the wr state over a vector-meson interpretation.

UR - http://www.scopus.com/inward/record.url?scp=0002694123&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0002694123&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.37.2379

DO - 10.1103/PhysRevD.37.2379

M3 - Article

AN - SCOPUS:0002694123

SN - 0556-2821

VL - 37

SP - 2379

EP - 2390

JO - Physical Review D

JF - Physical Review D

IS - 9

ER -

Production and decay properties of the ωπ0 state at 1250 MeV/c2 produced by 20-GeV polarized photons on hydrogen

Abstract

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