Matches in SemOpenAlex for { <https://semopenalex.org/work/W4200019689> ?p ?o ?g. }
- W4200019689 abstract "To investigate the interaction between the nucleon N and nucleon resonance N(1535)1/2−, the ηd threshold structure connected to the isoscalar S-wave N−N(1535)1/2− system has been experimentally studied in the γd→π0ηd reaction at incident photon energies ranging from the reaction threshold to 1.15 GeV. A strong enhancement is observed near the ηd threshold over the three-body phase-space contribution in the ηd invariant-mass distribution. An analysis incorporating the known isovector resonance D12 with a spin parity of 2+ in the π0d channel reveals the existence of a narrow isoscalar resonance-like structure with 1− in the ηd system. Using a Flatté parametrization, the mass is found to be 2.427−0.006+0.013 GeV, close to the ηd threshold, and the width is (0.029−0.029+0.006GeV)+(0.00−0.00+0.41)pηc, where pη denotes the η momentum in the rest frame of the ηd system. The observed structure would be attributed to a predicted isoscalar 1−ηNN bound state from ηNN and πNN coupled-channel calculation, or an ηd virtual state owing to strong ηd attraction.Received 24 May 2021Revised 27 July 2021Accepted 5 November 2021DOI:https://doi.org/10.1103/PhysRevC.104.L052201©2021 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasHadron-hadron interactionsParticle productionQuark modelResonance reactionsPhysical SystemsHadronsParticles & FieldsNuclear Physics" @default.
- W4200019689 created "2021-12-31" @default.
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- W4200019689 date "2021-11-29" @default.
- W4200019689 modified "2023-10-18" @default.
- W4200019689 title "Resonance-like structure near the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>η</mml:mi><mml:mi>d</mml:mi></mml:mrow></mml:math> threshold in the <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>γ</mml:mi><mml:mi>d</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mi>η</mml:mi><mml:mi>d</mml:mi></mml:mrow></mml:math> reaction" @default.
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