Observation of Tensor-Driven High-Momentum Neutrons in ${}^{16}$O via ($p,d$) Reactions and Zero-Degree Deuteron Momentum Spectroscopy

X. Wang; H. J. Ong; S. Terashima; I. Tanihata; Y. K. Tanaka; N. Aoi; Y. Ayyad; J. Benlliure; F. Farinon; H. Fujioka; H. Geissel; J. Gellanki; C. L. Guo; E. Haettner; W. L. Hai; M. N. Harakeh; C. Hornung; K. Itahashi; R. Janik; N. Kalantar-Nayestanaki; R. Knobel; N. Kurz; K. Miki; I. Mukha; T. Myo; T. Nishi; D. Y. Pang; S. Pietri; A. Prochazka; C. Rappold; M. P. Reiter; J. L. Rodriguez-Sanchez; C. Scheidenberger; H. Simon; B. Sitar; P. Strmen; B. H. Sun; K. Suzuki; I. Szarka; H. Toki; H. Weick; E. Widmann; J. S. Winfield; X. D Xu; J. W. Zhao

arXiv · 2508.12561

Observation of Tensor-Driven High-Momentum Neutrons in ${}^{16}$O via ($p,d$) Reactions and Zero-Degree Deuteron Momentum Spectroscopy

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Abstract

The $^{16}\mathrm{O}(p,d)^{15}\mathrm{O}$ reaction has been studied at $0^{\circ}$ using 403-, 604-, 907- and 1209-MeV protons, comparing cross sections populating positive- and negative-parity states in $^{15}\mathrm{O}$. Transitions to positive-parity states exhibit strong sensitivity to high-momentum neutrons, while negative-parity transitions show much smaller effects. The cross-section ratio between positive- and negative-parity states rises sharply with momentum transfer, matching theoretical predictions that include tensor interactions, particularly the peak near $2~\mathrm{fm}^{-1}$ for the $5/2^{+}$ to ground-state ratio. These results highlight $0^{\circ}$ neutron-pickup reactions as a sensitive probe for tensor-driven high-momentum components, paving the way for studies in exotic nuclei via radioactive beams.

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X. Wang, H. J. Ong, S. Terashima, I. Tanihata, Y. K. Tanaka, N. Aoi, Y. Ayyad, J. Benlliure, F. Farinon, H. Fujioka, H. Geissel, J. Gellanki, C. L. Guo, E. Haettner, W. L. Hai, M. N. Harakeh, C. Hornung, K. Itahashi, R. Janik, N. Kalantar-Nayestanaki, R. Knobel, N. Kurz, K. Miki, I. Mukha, T. Myo, T. Nishi, D. Y. Pang, S. Pietri, A. Prochazka, C. Rappold, M. P. Reiter, J. L. Rodriguez-Sanchez, C. Scheidenberger, H. Simon, B. Sitar, P. Strmen, B. H. Sun, K. Suzuki, I. Szarka, H. Toki, H. Weick, E. Widmann, J. S. Winfield, X. D Xu, J. W. Zhao. 2025-08-18. Observation of Tensor-Driven High-Momentum Neutrons in ${}^{16}$O via ($p,d$) Reactions and Zero-Degree Deuteron Momentum Spectroscopy. https://arxiv.org/abs/2508.12561

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