Investigation of nuclear charge symmetry by pion elastic scattering from H-3 and He-3

Dhuga, K.S.; Berman, B.L.; Briscoe, W.J.; Caress, R.W.; Matthews, S.K.; Barlow, D.B.; Nefkens, B.M.K.; Pillai, C.; Price, J.W.; Greene, S.J.

doi:10.1103/PhysRevC.54.2823

Investigation of nuclear charge symmetry by pion elastic scattering from H-3 and He-3

K.S. Dhuga
(
- George Washington U.
)
,
B.L. Berman
(
- George Washington U.
)
,
W.J. Briscoe
(
- George Washington U.
)
,
R.W. Caress
(
- George Washington U.
)
,
S.K. Matthews
(
- George Washington U.
)

1996

8 pages

Published in:

Phys.Rev.C 54 (1996) 2823-2830

DOI:

10.1103/PhysRevC.54.2823

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Abstract: (APS)

We have measured differential cross sections for pion elastic scattering from H3 and He3 in the angular region near the minimum in the non-spin-flip amplitude. Data were acquired for incident pion energies of 180, 220, 256, and 295 MeV. Nuclear charge symmetry is investigated with the aid of several charge-symmetric ratios formed from combinations of measured cross sections. A particularly intriguing result is obtained from the superratio R, which is defined as R=dσ(π+3H)dσ(π−3H)/dσ(π+3He)dσ(π−3He). R is found to be greater than unity at 180 MeV and significantly smaller than unity at 256 MeV, with the transition occurring at around 210 MeV. The charge-symmetry prediction for this ratio (after allowance for the Coulomb force) is one, and is independent of energy and angle. © 1996 The American Physical Society.

pi+ nucleus: elastic scattering
elastic scattering: pi+ nucleus
pi- nucleus: elastic scattering
elastic scattering: pi- nucleus
tritium
helium: nuclide
differential cross section: angular dependence
angular dependence: differential cross section
differential cross section: ratio
ratio: differential cross section

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