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From the same journal

Beam–target helicity asymmetry E in K+Σ photoproduction on the neutron

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Author(s)

  • The CLAS Collaboration
  • H Egiyan
  • M Ehrhart
  • A El Alaoui
  • P Eugenio
  • R. Fersch
  • A. Filippi
  • G. Gavalian
  • N. Gevorgyan
  • Y. Ghandilyan
  • G.P. Gilfoyle
  • F.X. Girod
  • W. Gohn
  • E. Golovatch
  • R.W. Gothe
  • K.A. Griffoen
  • M. Guidal
  • K. Hafidi
  • H. Hakobyan
  • M. Hattawy
  • D. Heddle
  • K. Hicks
  • D. Ho
  • M. Holtrop
  • Y. Ilieva
  • D.G. Ireland
  • B.S. Ishkanov
  • E.L. Isupov
  • D. Jenkins
  • H.S. Jo
  • K. Joo
  • S.J. Joosten
  • D. Keller
  • M. Khachatryan
  • A. Khanal
  • M. Khandaker
  • C.W. Kim
  • W. Kim
  • V. Kubarovsky
  • L. Lanza
  • M. Leali
  • P. Lenisa
  • K. Livingston
  • I.J.D. MacGregor
  • D. Marchand
  • N. Markov
  • L. Marsicano
  • V. Mascagna
  • M. Mayer
  • B. McKinnon
  • Z.E. Meziani
  • T. Mineeva
  • V. Mokeev
  • E. Munevar
  • C. Munoz Camacho
  • P. Nadal Turonski
  • T.R. O'Connell
  • M. Osipenko
  • A.I. Ostrovidov
  • M. Paolone
  • L.L. Pappalardo
  • K. Park
  • E. Pasyuk
  • P. Peng
  • W. Phelps
  • O. Pogorelko
  • J. Poudel
  • J.W. Price
  • Y. Prok
  • A.J.R. Puckett
  • B.R. Raue
  • M. Ripani
  • A. Rizzo
  • G. Rosner
  • C. Salgado
  • A. Schmidt
  • R.A. Schumacher
  • U. Shrestha
  • D. Sokhan
  • O. Soto
  • N. Sparveris
  • I.I. Strakovsky
  • S. Strauch
  • J.A. Tan
  • N. Tyler
  • M. Ungaro
  • L. Venturelli
  • H. Voskanyan
  • E. Voutier
  • N.K. Walford
  • C.S. Whisnant
  • M.H. Wood
  • J. Zhang
  • Z.W. Zhao

Department/unit(s)

Publication details

JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
DateAccepted/In press - 26 Jul 2020
DateE-pub ahead of print - 30 Jul 2020
DatePublished (current) - 10 Sep 2020
Volume808
Number of pages7
Early online date30/07/20
Original languageEnglish

Abstract

We report a measurement of a beam–target double-polarisation observable (E) for the γ→n→(p)→K+Σ(p) reaction. The data were obtained impinging the circularly-polarised energy-tagged photon beam of Hall B at Jefferson Lab on a longitudinally-polarised frozen-spin hydrogen deuteride (HD) nuclear target. The E observable for an effective neutron target was determined for centre-of-mass energies 1.70≤W≤2.30 GeV, with reaction products detected over a wide angular acceptance by the CLAS spectrometer. These new double-polarisation data give unique constraints on the strange decays of excited neutron states. Inclusion of the new data within the Bonn-Gatchina theoretical model results in significant changes for the extracted photocouplings of a number of established nucleon resonances. Possible improvements in the PWA description of the experimental data with additional “missing” resonance states, including the N(2120)3/2 resonance, are also quantified.

Bibliographical note

©2020 Published by Elsevier B.V.

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