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HK: Fachverband Hadronen und Kerne
HK 11: Few-body physics
HK 11.6: Vortrag
Montag, 16. März 2009, 15:30–15:45, H-ZO 100
Recent results for trinucleon transverse response functions using the LIT method — •Edward L. Tomusiak1, Victor D. Efros2, Winfried Leidemann3,4, and Giuseppina Orlandini3,4 — 1Dept. of Physics and Astronomy, University of Victoria, Victoria, BC V8P 1A1, Canada — 2Russian Research Centre “Kurchatov Institute", 123182 Moscow, Russia — 3Dipartimento di Fisica, Universita‘ di Trento, Via Sommarive 14, 38100 Trento, Italy — 4Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Trento
The 3He and 3H electron scattering transverse response functions RT(q,ω) are calculated using the AV18 nucleon-nucleon potential and the UrbanaIX three-body force. The transition to continuum states is treated ab initio via the Lorentz Integral Transform (LIT) method [1]. The electromagnetic interactions include exchange currents. Their construction is unambiguous for boson exchange potentials, but require a prescription for “phenomenological” forces. Since the calculation is carried out in coordinate space the Arenhövel-Schwamb technique [2] is used for constructing consistent π- and ρ-like exchange currents for the AV18 potential. Theoretical results are compared to existing experimental data [3] in the threshold region at q=0.0882, 1.64 and 2.47 fm−1, both for 3He and 3H.
[1] V.D. Efros, W. Leidemann, and G. Orlandini, Phys. Lett. B 338, 130 (1994).
[2] H. Arenhövel and M. Schwamb, Eur. Phys. J. A, 12, 207 (2001).
[3] G. A. Retzlaff et al. Phys. Rev. C49, 1263 (1994).