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| Formato: | Preprint |
| Publicado: |
2026
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2604.25107 |
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| author | Wang, Y. J. Tam, C. K. Xiao, Z. G. Lynch, W. G. Tsang, C. Y. Barney, J. Jhang, G. Estee, J. Tsang, M. B. Wang, R. S. Kaneko, M. Lee, J. W. Park, J. Chajęcki, Z. Verde, G. Isobe, T. Kurata-Nishimura, M. Murakami, T. Ahn, D. S. Atar, L. Aumann, T. Baba, H. Boretzky, K. Brzychczyk, J. Cerizza, G. Chiga, N. Fukuda, N. Gasparic, I. Hong, B. Horvat, A. Ieki, K. Inabe, N. Kim, Y. J. Kobayashi, T. Kondo, Y. Lasko, P. Lee, H. S. Leifels, Y. Łukasik, J. Manfredi, J. McIntosh, A. B. Morfouace, P. Nakamura, T. Nakatsuka, N. Nishimura, S. Otsu, H. Pawłowski, P. Pelczar, K. Rossi, D. Sakurai, H. Santamaria, C. Sato, H. Scheit, H. Shane, R. Shimizu, Y. Simon, H. Snoch, A. Sochocka, A. Sumikama, T. Suzuki, H. Suzuki, D. Takeda, H. Tangwancharoen, S. Toernqvist, H. Togano, Y. Yennello, S. J. Zhang, Y. |
| author_facet | Wang, Y. J. Tam, C. K. Xiao, Z. G. Lynch, W. G. Tsang, C. Y. Barney, J. Jhang, G. Estee, J. Tsang, M. B. Wang, R. S. Kaneko, M. Lee, J. W. Park, J. Chajęcki, Z. Verde, G. Isobe, T. Kurata-Nishimura, M. Murakami, T. Ahn, D. S. Atar, L. Aumann, T. Baba, H. Boretzky, K. Brzychczyk, J. Cerizza, G. Chiga, N. Fukuda, N. Gasparic, I. Hong, B. Horvat, A. Ieki, K. Inabe, N. Kim, Y. J. Kobayashi, T. Kondo, Y. Lasko, P. Lee, H. S. Leifels, Y. Łukasik, J. Manfredi, J. McIntosh, A. B. Morfouace, P. Nakamura, T. Nakatsuka, N. Nishimura, S. Otsu, H. Pawłowski, P. Pelczar, K. Rossi, D. Sakurai, H. Santamaria, C. Sato, H. Scheit, H. Shane, R. Shimizu, Y. Simon, H. Snoch, A. Sochocka, A. Sumikama, T. Suzuki, H. Suzuki, D. Takeda, H. Tangwancharoen, S. Toernqvist, H. Togano, Y. Yennello, S. J. Zhang, Y. |
| contents | We report proton-proton correlation function measurements in central $^{132}$Sn+$^{124}$Sn and $^{108}$Sn+$^{112}$Sn collisions at 270 MeV/nucleon. The proton emitting source sizes are extracted for the systems by using femtoscopic imaging technique. The fast dynamic core radius for the neutron-rich system is found to be $2.22 \pm 0.13\ \text{(stat.)} \pm 0.07\ \text{(syst.)}$ fm, which is approximately 24\% larger than that for the neutron-deficient system, $1.74 \pm 0.08\ \text{(stat.)} \pm 0.05\ \text{(syst.)}$ fm. This difference is an order of magnitude larger than the $\sim$3\% difference in the ground-state charge radii of the projectile nuclei. Transport model simulations based on mean-field dynamics cannot reproduce this amplification. The observation reveals a beyond-mean-field mechanism associated to short-range neutron-proton correlations, which dynamically enhance the proton emitting source in the neutron-rich environment. Our results demonstrate that heavy-ion collisions induced by radioactive beam, combined with femtoscopic precision, provide a new hadronic probe of short-range correlation, and that careful treatment of the beyond-mean-field interactions are required in modeling such processes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_25107 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Large amplification of the isospin-dependence of proton emitting source size in radioactive heavy-ion collisions: a signal of n-p correlation Wang, Y. J. Tam, C. K. Xiao, Z. G. Lynch, W. G. Tsang, C. Y. Barney, J. Jhang, G. Estee, J. Tsang, M. B. Wang, R. S. Kaneko, M. Lee, J. W. Park, J. Chajęcki, Z. Verde, G. Isobe, T. Kurata-Nishimura, M. Murakami, T. Ahn, D. S. Atar, L. Aumann, T. Baba, H. Boretzky, K. Brzychczyk, J. Cerizza, G. Chiga, N. Fukuda, N. Gasparic, I. Hong, B. Horvat, A. Ieki, K. Inabe, N. Kim, Y. J. Kobayashi, T. Kondo, Y. Lasko, P. Lee, H. S. Leifels, Y. Łukasik, J. Manfredi, J. McIntosh, A. B. Morfouace, P. Nakamura, T. Nakatsuka, N. Nishimura, S. Otsu, H. Pawłowski, P. Pelczar, K. Rossi, D. Sakurai, H. Santamaria, C. Sato, H. Scheit, H. Shane, R. Shimizu, Y. Simon, H. Snoch, A. Sochocka, A. Sumikama, T. Suzuki, H. Suzuki, D. Takeda, H. Tangwancharoen, S. Toernqvist, H. Togano, Y. Yennello, S. J. Zhang, Y. Nuclear Experiment We report proton-proton correlation function measurements in central $^{132}$Sn+$^{124}$Sn and $^{108}$Sn+$^{112}$Sn collisions at 270 MeV/nucleon. The proton emitting source sizes are extracted for the systems by using femtoscopic imaging technique. The fast dynamic core radius for the neutron-rich system is found to be $2.22 \pm 0.13\ \text{(stat.)} \pm 0.07\ \text{(syst.)}$ fm, which is approximately 24\% larger than that for the neutron-deficient system, $1.74 \pm 0.08\ \text{(stat.)} \pm 0.05\ \text{(syst.)}$ fm. This difference is an order of magnitude larger than the $\sim$3\% difference in the ground-state charge radii of the projectile nuclei. Transport model simulations based on mean-field dynamics cannot reproduce this amplification. The observation reveals a beyond-mean-field mechanism associated to short-range neutron-proton correlations, which dynamically enhance the proton emitting source in the neutron-rich environment. Our results demonstrate that heavy-ion collisions induced by radioactive beam, combined with femtoscopic precision, provide a new hadronic probe of short-range correlation, and that careful treatment of the beyond-mean-field interactions are required in modeling such processes. |
| title | Large amplification of the isospin-dependence of proton emitting source size in radioactive heavy-ion collisions: a signal of n-p correlation |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2604.25107 |