Weak capture of protons by protons

Phys. Rev. C 58, 1263 – Published 1 August 1998
R. Schiavilla, V. G. J. Stoks, W. Glöckle, H. Kamada, A. Nogga, J. Carlson, R. Machleidt, V. R. Pandharipande, R. B. Wiringa, A. Kievsky, S. Rosati, and M. Viviani

Abstract

The cross section for the proton weak capture reaction 1H(p,e+νe)2H is calculated with wave functions obtained from a number of modern, realistic high-precision interactions. To minimize the uncertainty in the axial two-body current operator, its matrix element has been adjusted to reproduce the measured Gamow-Teller matrix element of tritium β decay in model calculations using trinucleon wave functions from these interactions. A thorough analysis of the ambiguities that this procedure introduces in evaluating the two-body current contribution to the pp capture is given. Its inherent model dependence is in fact found to be very weak. The overlap integral Λ2(E=0) for the pp capture is predicted to be in the range 7.05–7.06, including the axial two-body current contribution, for all interactions considered.

DOI: http://dx.doi.org/10.1103/PhysRevC.58.1263

  • Received 2 April 1998
  • Published in the issue dated August 1998

© 1998 The American Physical Society

Authors & Affiliations

R. Schiavilla

  • Jefferson Lab, Newport News, Virginia 23606
  • Department of Physics, Old Dominion University, Norfolk, Virginia 23529

V. G. J. Stoks

  • Centre for the Subatomic Structure of Matter, University of Adelaide, Adelaide, Australia 5005
  • Physics Division, Argonne National Laboratory, Argonne, Illinois 60439

W. Glöckle, H. Kamada*, and A. Nogga

  • Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany

J. Carlson

  • Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

R. Machleidt

  • Department of Physics, University of Idaho, Moscow, Idaho 83483

V. R. Pandharipande

  • Department of Physics, University of Illinois, Urbana, Illinois 61801

R. B. Wiringa

  • Physics Division, Argonne National Laboratory, Argonne, Illinois 60439

A. Kievsky

  • INFN, Sezione di Pisa, I-56100 Pisa, Italy

S. Rosati

  • Department of Physics, University of Pisa, I-56100 Pisa, Italy
  • INFN, Sezione di Pisa, I-56100 Pisa, Italy

M. Viviani

  • INFN, Sezione di Pisa, I-56100 Pisa, Italy

  • *Also Institut für Kernphysik, Technische Hochschule Darmstadt, D-64289 Darmstadt, Germany.

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