Coherent interactions of a fast proton with the short-range  NN correlations in the nucleus

Larionov, A.B.; Uzikov, Y.N.

Авторы: Larionov A.B., Uzikov Yu N.
Журнал: Physical Review C
Том: 109
Номер: 6
Год издания: 2024
Издательство: American Physical Society
Местоположение издательства: College Park, MD
Первая страница: 064601(1)
Последняя страница: 064601(15)
Номер статьи: 064601
DOI: 10.1103/physrevc.109.064601
Аннотация: Nuclear structure at short 𝑁⁢𝑁 distances is still poorly understood. In particular, the full quantum structure of the nucleus with a correlated 𝑁⁢𝑁 pair is a challenge to theory. So far, model descriptions have been limited to the average mean-field picture of the remaining nuclear system after removing the 𝑁⁢𝑁 pair. In the recent experiment of the BM@N Collaboration at JINR [M. Patsyuk et al., Nat. Phys. 17, 693 (2021)], the reactions 12C⁢(𝑝,2⁢𝑝⁢𝑛_𝑠)10⁢B and 12C⁢(𝑝,2⁢𝑝⁢𝑝_𝑠)10⁢Be induced by the hard elastic 𝑝⁢𝑝 scattering were studied. Here, 𝑛_𝑠 or 𝑝_𝑠 denote the undetected slow nucleon in the rest frame of 12C. In contrast to the previous experiments, the residual bound nucleus was also detected which requires a new level of theoretical understanding. In the present work, we apply the technique of fractional parentage coefficients of the translationally invariant shell model to calculate the spectroscopic amplitude of the system 𝑁⁢𝑁−𝐵 where 𝐵 is the remaining nuclear system. The spectroscopic amplitude enters the full amplitude of a nuclear reaction. The relative 𝑁⁢𝑁−𝐵 wave function is no longer a free parameter of the model but is uniquely related to the internal state of 𝐵. The interaction of the target proton with the 𝑁⁢𝑁 pair is considered in the impulse approximation. We also include the initial- and final-state interactions of absorptive type as well as the single charge exchange processes. Our calculations are in a reasonable agreement with the BM@N data.
Добавил в систему: Узиков Юрий Николаевич

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Coherent interactions of a fast proton with the short-range NN correlations in the nucleusстатья

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