학술논문
Beam–target helicity asymmetry E in K+Σ− photoproduction on the neutron
Document Type
article
Author
N. Zachariou; D.P. Watts; J. Fleming; A.V. Sarantsev; V.A. Nikonov; A. D'Angelo; M. Bashkanov; C. Hanretty; T. Kageya; F.J. Klein; M. Lowry; H. Lu; A. Sandorfi; X. Wei; I. Zonta; K.P. Adhikari; S. Adhikari; M.J. Amaryan; G. Angelini; G. Asryan; H. Atac; L. Barion; C. Bass; M. Battaglieri; I. Bedlinskiy; F. Benmokhtar; A. Bianconi; A.S. Biselli; F. Bossù; S. Boiarinov; W.J. Briscoe; W.K. Brooks; D. Bulumulla; V. Burkert; D.S. Carman; J.C. Carvajal; A. Celentano; G. Charles; P. Chatagnon; T. Chetry; G. Ciullo; P.L. Cole; M. Contalbrigo; N. Dashyan; R. De Vita; A. Deur; S. Diehl; C. Djalali; R. Dupre; H. Egiyan; M. Ehrhart; A. El Alaoui; P. Eugenio; S. Fegan; 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. Griffioen; M. Guidal; K. Hafidi; H. Hakobyan; M. Hattawy; D. Heddle; K. Hicks; D. Ho; M. Holtrop; Y. Ilieva; D.G. Ireland; B.S. Ishkhanov; 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. Nadel 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.A. 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
Source
Physics Letters B, Vol 808, Iss , Pp 135662- (2020)
Subject
Language
English
ISSN
0370-2693
19409494
19409494
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.