### Abstract

We report measurements of the cross section and a complete set of polarization observables for the Gamow-Teller ^{12}C (over(p, →), over(n, →)) ^{12}N (g.s., 1^{+}) reaction at a bombarding energy of 296 MeV. The data are compared with distorted wave impulse approximation calculations employing transition form factors normalized to reproduce the observed beta-decay ft value. The cross section is significantly under-predicted by the calculations at momentum transfers q ≳ 0.5 fm^{-1}. The discrepancy is partly resolved by considering the non-locality of the nuclear mean field. However, the calculations still under-predict the cross section at large momentum transfers of q ≃ 1.6 fm^{-1}. We also performed calculations employing random phase approximation response functions and found that the observed enhancement can be attributed in part to pionic correlations in nuclei.

Original language | English |
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Pages (from-to) | 38-44 |

Number of pages | 7 |

Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |

Volume | 656 |

Issue number | 1-3 |

DOIs | |

Publication status | Published - Nov 15 2007 |

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### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics

### Cite this

^{12}C (over(p, →), over(n, →))

^{12}N (g.s., 1

^{+}) at 296 MeV.

*Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics*,

*656*(1-3), 38-44. https://doi.org/10.1016/j.physletb.2007.10.017