Photoproduction of Λ and Σ0 hyperons using linearly polarized photons

CLAS Collaboration

doi:10.1103/PhysRevC.93.065201

Photoproduction of Λ and Σ0 hyperons using linearly polarized photons

CLAS Collaboration

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

54 Scopus citations

Abstract

Background: Measurements of polarization observables for the reactions γ - p→K+Λ and γ - p→K+Σ0 have been performed. This is part of a program of measurements designed to study the spectrum of baryon resonances in particular, and nonperturbative QCD in general. Purpose: The accurate measurement of several polarization observables provides tight constraints for phenomenological fits, which allow the study of strangeness in nucleon and nuclear systems. Beam-recoil observables for the γ - p→K+Σ0 reaction have not been reported before now. Method: The measurements were carried out using linearly polarized photon beams incident on a liquid hydrogen target, and the CLAS detector at the Thomas Jefferson National Accelerator Facility. The energy range of the results is 1.71<W<2.19GeV, with an angular range -0.75<cosθK<+0.85. Results: The observables extracted for both reactions are beam asymmetry Σ, target asymmetry T, and the beam-recoil double polarization observables Ox and Oz. Conclusions: Comparison with theoretical fits indicates that, in the regions where no previous data existed, the new data contain significant new information, and strengthen the evidence for the set of resonances used in the latest Bonn-Gatchina fit.

Original language	English (US)
Article number	065201
Journal	Physical Review C
Volume	93
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.93.065201
State	Published - Jun 8 2016

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.93.065201

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@article{ba13dffe3ec44826abcdc13f82756c6a,

title = "Photoproduction of Λ and Σ0 hyperons using linearly polarized photons",

abstract = "Background: Measurements of polarization observables for the reactions γ - p→K+Λ and γ - p→K+Σ0 have been performed. This is part of a program of measurements designed to study the spectrum of baryon resonances in particular, and nonperturbative QCD in general. Purpose: The accurate measurement of several polarization observables provides tight constraints for phenomenological fits, which allow the study of strangeness in nucleon and nuclear systems. Beam-recoil observables for the γ - p→K+Σ0 reaction have not been reported before now. Method: The measurements were carried out using linearly polarized photon beams incident on a liquid hydrogen target, and the CLAS detector at the Thomas Jefferson National Accelerator Facility. The energy range of the results is 1.71<W<2.19GeV, with an angular range -0.75",

author = "{CLAS Collaboration} and Paterson, {C. A.} and Ireland, {D. G.} and K. Livingston and B. McKinnon and Adhikari, {K. P.} and D. Adikaram and Z. Akbar and M. Amaryan and {Anefalos Pereira}, S. and Badui, {R. A.} and J. Ball and Baltzell, {N. A.} and M. Battaglieri and I. Bedlinskiy and A. Biselli and Briscoe, {W. J.} and Brooks, {W. K.} and Burkert, {V. D.} and Carman, {D. S.} and A. Celentano and T. Chetry and G. Ciullo and L. Clark and L. Colaneri and Cole, {P. L.} and N. Compton and M. Contalbrigo and O. Cortes and V. Crede and A. D'Angelo and {De Vita}, R. and A. Deur and C. Djalali and Michael Dugger and R. Dupre and H. Egiyan and {El Alaoui}, A. and {El Fassi}, L. and E. Fanchini and G. Fedotov and A. Filippi and Fleming, {J. A.} and N. Gevorgyan and Y. Ghandilyan and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and Glazier, {D. I.} and C. Gleason and Barry Ritchie",

note = "Publisher Copyright: {\textcopyright} 2016 authors. Published by the American Physical Society.",

year = "2016",

month = jun,

day = "8",

doi = "10.1103/PhysRevC.93.065201",

language = "English (US)",

volume = "93",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "6",

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TY - JOUR

T1 - Photoproduction of Λ and Σ0 hyperons using linearly polarized photons

AU - CLAS Collaboration

AU - Paterson, C. A.

AU - Ireland, D. G.

AU - Livingston, K.

AU - McKinnon, B.

AU - Adhikari, K. P.

AU - Adikaram, D.

AU - Akbar, Z.

AU - Amaryan, M.

AU - Anefalos Pereira, S.

AU - Badui, R. A.

AU - Ball, J.

AU - Baltzell, N. A.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Biselli, A.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Celentano, A.

AU - Chetry, T.

AU - Ciullo, G.

AU - Clark, L.

AU - Colaneri, L.

AU - Cole, P. L.

AU - Compton, N.

AU - Contalbrigo, M.

AU - Cortes, O.

AU - Crede, V.

AU - D'Angelo, A.

AU - De Vita, R.

AU - Deur, A.

AU - Djalali, C.

AU - Dugger, Michael

AU - Dupre, R.

AU - Egiyan, H.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Fanchini, E.

AU - Fedotov, G.

AU - Filippi, A.

AU - Fleming, J. A.

AU - Gevorgyan, N.

AU - Ghandilyan, Y.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Glazier, D. I.

AU - Gleason, C.

AU - Ritchie, Barry

PY - 2016/6/8

Y1 - 2016/6/8

N2 - Background: Measurements of polarization observables for the reactions γ - p→K+Λ and γ - p→K+Σ0 have been performed. This is part of a program of measurements designed to study the spectrum of baryon resonances in particular, and nonperturbative QCD in general. Purpose: The accurate measurement of several polarization observables provides tight constraints for phenomenological fits, which allow the study of strangeness in nucleon and nuclear systems. Beam-recoil observables for the γ - p→K+Σ0 reaction have not been reported before now. Method: The measurements were carried out using linearly polarized photon beams incident on a liquid hydrogen target, and the CLAS detector at the Thomas Jefferson National Accelerator Facility. The energy range of the results is 1.71<W<2.19GeV, with an angular range -0.75

AB - Background: Measurements of polarization observables for the reactions γ - p→K+Λ and γ - p→K+Σ0 have been performed. This is part of a program of measurements designed to study the spectrum of baryon resonances in particular, and nonperturbative QCD in general. Purpose: The accurate measurement of several polarization observables provides tight constraints for phenomenological fits, which allow the study of strangeness in nucleon and nuclear systems. Beam-recoil observables for the γ - p→K+Σ0 reaction have not been reported before now. Method: The measurements were carried out using linearly polarized photon beams incident on a liquid hydrogen target, and the CLAS detector at the Thomas Jefferson National Accelerator Facility. The energy range of the results is 1.71<W<2.19GeV, with an angular range -0.75

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U2 - 10.1103/PhysRevC.93.065201

DO - 10.1103/PhysRevC.93.065201

M3 - Article

AN - SCOPUS:85007358159

SN - 2469-9985

VL - 93

JO - Physical Review C

JF - Physical Review C

IS - 6

M1 - 065201

ER -

Photoproduction of Λ and Σ0 hyperons using linearly polarized photons

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