TY - JOUR
T1 - Measurement of isospin mixing in He4 and its implications for charge-symmetry breaking
AU - Blilie, C. L.
AU - Dehnhard, D.
AU - Holtkamp, D. B.
AU - Seestrom-Morris, S. J.
AU - Nanda, S. K.
AU - Cottingame, W. B.
AU - Halderson, D.
AU - Morris, C. L.
AU - Moore, C. Fred
AU - Seidl, P. A.
AU - Ohnuma, H.
AU - Maeda, K.
PY - 1986
Y1 - 1986
N2 - -He4 inelastic cross sections have been measured at T=180 MeV. In the region of the J=1- states Ex 23 to 30 MeV) the +- cross-section ratio R was found to be 1.05 ± 0.08 at lab=30°. Such a small deviation from 1.0 implies that isospin mixing between the T=0 and T=1 states in He4 is quite weak, in striking contrast to the strong isospin mixing deduced from the large ratio of photonucleon cross sections, R=(,p)(,n)1.7. Thus the conclusion drawn from the photonucleon work, that there is a large charge-symmetry-breaking nuclear force in He4, needs to be reexamined.
AB - -He4 inelastic cross sections have been measured at T=180 MeV. In the region of the J=1- states Ex 23 to 30 MeV) the +- cross-section ratio R was found to be 1.05 ± 0.08 at lab=30°. Such a small deviation from 1.0 implies that isospin mixing between the T=0 and T=1 states in He4 is quite weak, in striking contrast to the strong isospin mixing deduced from the large ratio of photonucleon cross sections, R=(,p)(,n)1.7. Thus the conclusion drawn from the photonucleon work, that there is a large charge-symmetry-breaking nuclear force in He4, needs to be reexamined.
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U2 - 10.1103/PhysRevLett.57.543
DO - 10.1103/PhysRevLett.57.543
M3 - Article
AN - SCOPUS:4243887861
SN - 0031-9007
VL - 57
SP - 543
EP - 546
JO - Physical Review Letters
JF - Physical Review Letters
IS - 5
ER -