Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-08-14
Phys.Rev. C69 (2004) 034004
Physics
Nuclear Physics
Nuclear Theory
18 pages (RevTex4), 15 figures, resubmitted to Phys. Rev. C
Scientific paper
10.1103/PhysRevC.69.034004
Radiative nucleon-deuteron capture and two- and three-body photo disintegration 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 + $\Delta$. The $\Delta$-isobar excitation yields an effective three-nucleon force and effective two- and three-nucleon currents besides other $\Delta$-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 $\Delta$-isobar channels. $\Delta$-isobar effects on the observables are isolated. Shortcomings of the theoretical description are discussed and their consequence for the calculation of observables is estimated.
Adam J. Jr.
Deltuva Arnoldas
Fonseca Antonio C.
Sauer Peter U.
Yuan Luping P.
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