Trinucleon photonuclear reactions with $\ensuremath{\Delta}$-isobar excitation: Processes below pion-production threshold

Trinucleon photonuclear reactions with $Δ$ -isobar excitation: Processes below pion-production threshold

A. Deltuva, L. P. Yuan, J. Adam, Jr., A. C. Fonseca, and P. U. Sauer

Phys. Rev. C 69, 034004 – Published 15 March 2004

Abstract

Radiative nucleon-deuteron capture and two- and three-body photodisintegration of the three-nucleon bound state are described. The description uses the purely nucleonic charge-dependent CD-Bonn potential and its coupled-channel extension CD Bonn $+ Δ$ . The $Δ$ -isobar excitation yields an effective three-nucleon force and effective two- and three-nucleon currents beside other $Δ$ -isobar effects; they are mutually consistent. Exact solutions of three-particle equations are employed for the initial and final states of the reactions. The current has one-baryon and two-baryon contributions and couples nucleonic with $Δ$ -isobar channels. $Δ$ -isobar effects on the observables are isolated. Shortcomings of the theoretical description are discussed and their consequence for the calculation of observables is estimated.

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Received 13 August 2003

DOI:https://doi.org/10.1103/PhysRevC.69.034004

Authors & Affiliations

A. Deltuva^1,*, L. P. Yuan¹, J. Adam, Jr.², A. C. Fonseca³, and P. U. Sauer¹

¹Institut für Theoretische Physik, Universität Hannover, D-30167 Hannover, Germany
²Nuclear Physics Institute, CZ-25068 Řež near Prague, Czech Republic
³Centro de Física Nuclear da Universidade de Lisboa, P-1649-003 Lisboa, Portugal

^*On leave from Institute of Theoretical Physics and Astronomy, Vilnius University, Vilnius 2600, Lithuania. Electronic address: deltuva@itp.uni-hannover.de

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Vol. 69, Iss. 3 — March 2004

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Physical Review C

covering nuclear physics

Trinucleon photonuclear reactions with $Δ$ -isobar excitation: Processes below pion-production threshold

A. Deltuva, L. P. Yuan, J. Adam, Jr., A. C. Fonseca, and P. U. Sauer

Phys. Rev. C 69, 034004 – Published 15 March 2004

Abstract

Authors & Affiliations

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Physical Review C

covering nuclear physics

Trinucleon photonuclear reactions with Δ-isobar excitation: Processes below pion-production threshold

A. Deltuva, L. P. Yuan, J. Adam, Jr., A. C. Fonseca, and P. U. Sauer

Phys. Rev. C 69, 034004 – Published 15 March 2004

Abstract

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Trinucleon photonuclear reactions with $Δ$ -isobar excitation: Processes below pion-production threshold