Abstract:
The nucleons in nuclei form temporally correlated pairs in close proximity, called short range correlation (SRC), which plays a crucial role in understanding nuclear structure and the fundamental properties of dense nuclear matter. The consequence of SRC on heavy-ion collisions (HICs) has remained unexplored until now. In this paper, we identify neutron-proton bremsstrahlung γ-ray emission from HICs as a new indicator of SRC in nuclei. By observing the hardening of the bremsstrahlung γ-ray spectrum, which results from the increase of high-momentum components above the Fermi surface in nucleon momentum distributions, we precisely determine the SRC fraction in nuclei to be (21±7)% at 3σ confidence levels. Our experiment identifies the first direct and accurate signature of SRC in low-energy HICs, providing a new method to study the parton momentum distribution of nucleons in nuclei.
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From:
Junhuai Xu
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Subject:
Physics
>>
Nuclear Physics
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Contribution：
No Submitted
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Cite as:
ChinaXiv:202504.00252
(or this version
ChinaXiv:202504.00252V1)
DOI:10.12074/202504.00252
CSTR:32003.36.ChinaXiv.202504.00252
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TXID：
e88e9966-370c-4d9f-bc4f-8caf3ae3eb13
- Recommended references：
Junhuai Xu,Qinglin Niu,Yuhao Qin,Dawei Si,Yijie Wang,Sheng Xiao,Baiting Tian,Zhi Qin,Haojie Zhang,Boyuan Zhang,Dong Guo,Minxue Fu,Xiaobao Wei,Yibo Hao,Zengxiang Wang,Tianren Zhuo,Chunwang Ma,Yuansheng Yang,Xianglun Wei,Herun Yang,Peng Ma,Limin Duan,Fangfang Duan,Kang Wang,Junbing Ma,Shiwei Xu,Zhen Bai,Guo Yang,Yanyun Yang,Mengke Xu,Kaijie Chen,Zirui Hao,Gongtao Fan,Hongwei Wang,Chang Xu,Zhigang Xiao.Bremsstrahlung Gamma Ray as a Probe of Short-Range Correlations in Nuclei.中国科学院科技论文预发布平台.[DOI:10.12074/202504.00252]
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