Abstract
This paper investigates the possible use of the Hyperspherical Adiabatic basis in the description of scattering states of a three-body system. In particular, we analyze a 1 + 2 collision process below the three-body breakup. The convergence patterns for the observables of interest are analyzed by comparison to a unitary equivalent Hyperspherical Harmonic expansion. Furthermore, we compare and discuss two different possible choices for describing the asymptotic configurations of the system, related to the use of Jacobi or hyperspherical coordinates. In order to illustrate the difficulties and advantages of the approach two simple numerical applications are shown in the case of neutron-deuteron scattering at low energies using s-wave interactions. We found that the optimization driven by the Hyperspherical Adiabatic basis is not as efficient for scattering states as in bound state applications.
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Nielsen E., Fedorov D.V., Jensen A.S.: The structure of the atomic helium trimers: Halos and Efimov states. J. Phys. B: At. Mol. Opt. Phys. 31, 4085–4105 (1998)
Blume D., Greene C., Esry B.D.: Comparative study of He3, Ne3 and Ar3 using hyperspherical coordinates. J. Chem. Phys. 113, 2145–2158 (2000)
Das Y., Coelho H., Fabre de la Ripelle M.: Uncoupled adiabatic approximation for the hyperspherical harmonic approach. Phys. Rev. C 26, 2281 (1982)
Ballot J., Fabre de la Ripelle M.: Contribution of three-body force to the trinucleon problem by an essentially exact calculation. Phys. Rev. C 26, 2301 (1982)
Fabre de la Ripelle M., Fiedeldey H., Sofianos S.: Integrodifferential equation for few- and many-body systems. Phys. Rev. C 38, 449 (1988)
Fabre de la Ripelle M.: Green function and scattering amplitudes in many-dimensional spaces. Few Body Syst. 14, 1–24 (1993)
Kievsky A., Rosati S., Viviani M.: Study of bound and scattering states in three-nucleon systems. Nucl. Phys. A 577, 511 (1994)
Kievsky A., Viviani M., Rosati S.: N-d scattering above the deuteron break-up threshold. Phys. Rev. C 56, 2987 (1997)
Chen C.R. et al.: Low-energy nucleon-deuteron scattering. Phys. Rev. C 39, 1261 (1989)
Payne G.L., Friar J.L., Gibson B.F.: Configuration space Faddeev continuum calculations. I. n-d scattering length. Phys. Rev. C 26, 1385 (1982)
Gusev V. et al.: Adiabatic hyperspherycal approach to the coulomb three-body problem: theory and numerical method. Few Body Syst. 9, 137–153 (1990)
Fabre de la Ripelle M.: Application of the hyperspherical formalism to the trinucleon bound state problems. Ann. Phys. 127, 62–125 (1980)
Fabre de la Ripelle M.: The potential harmonic expansion method. Ann. Phys. 147, 281–320 (1983)
Abramovitz M., Stegun I.A.: Handbook of mathematical functions. Dover Publications, New York (1970)
Barletta P., Kievsky A.: Variational description of the helium trimer using correlated hyperspherical harmonic basis functions. Phys. Rev. A A64, 042514 (2001)
Kievsky A.: The complex Khon variational method applied to N-d scattering. Nucl. Phys. A 624, 125–139 (1997)
Barletta, P., Kievsky, A.: (in preparation)
Light J.C., Carrington T.Jr.: Discrete variable representations and their utilization. Adv. Chem. Phys. 114, 263–310 (2000)
Lombardi M., Barletta P., Kievsky A.: Variational bounds using a discrete variable representation. Phys. Rev. A 70, 032503 (2004)
Barletta, P., Kievsky, A.: Continuum three-body states using the hyperspherical adiabatic basis set. Few Body Syst. (accepted for publication)
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Barletta, P., Kievsky, A. Three-Nucleon Continuum by Means of the Hyperspherical Adiabatic Method. Few-Body Syst 45, 25–41 (2009). https://doi.org/10.1007/s00601-008-0002-7
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DOI: https://doi.org/10.1007/s00601-008-0002-7