Short-range correlation physics at low renormalization group resolution

Short-range correlation physics at low renormalization group resolution
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低重正化群分辨率下的短程相关物理

DOI:
10.1103/physrevc.104.034311
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发表时间:
2021
期刊:
影响因子:
3.1
通讯作者:
Furnstahl, R. J.
Furnstahl, R. J.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Tropiano, A. J.;Bogner, S. K.;Furnstahl, R. J.

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最近的实验已经成功地隔离的过程,短程相关(SRC)物理是占主导地位的,以及占SRC现象。但从重整化群(RG)演化到低RG分辨率,出现了另一种令人信服的景象。在高RG分辨率下,SRC被确定为相对对动量大于费米动量的核波函数中的组件。尺度分离导致波函数因子分解,可以利用现象学,如广义接触形式主义或低阶相关算子近似。进化到较低的分辨率将SRC物理从核结构转移到反应算符,而不改变测量的可观测量。我们展示了如何在高RG分辨率下表现出的SRC现象学的特征在低RG分辨率下使用简单的两体算子和具有不相关波函数的局部密度近似来清晰地识别,所有这些都可以系统地推广。我们验证了迄今为止的实验结果直接遵循在低分辨率从完善的核子核子相互作用的性质,如张量力。因此,RG调和了同一实验的对比图片,并展示了如何使用没有SRC分量的波函数获得正确的结果。我们的演示有影响的敲除反应的分析,SRC物理学是不干净的隔离。
Recent experiments have succeeded in isolating processes for which short-range correlation (SRC) physics is dominant and well accounted for by SRC phenomenology. But an alternative and compelling picture emerges from renormalization group (RG) evolution to low RG resolution. At high RG resolution, SRCs are identified as components in the nuclear wave function with relative pair momenta greater than the Fermi momentum. Scale separation results in wave-function factorization that can be exploited with phenomenologies such as the generalized contact formalism or the low-order correlation operator approximation. Evolution to lower resolution shifts SRC physics from nuclear structure to the reaction operators without changing the measured observables. We show how the features of SRC phenomenology manifested at high RG resolution are cleanly identified at low RG resolution using simple two-body operators and local-density approximations with uncorrelated wave functions, all of which can be systematically generalized. We verify that the experimental consequences to date follow directly at low resolution from well-established properties of nucleon-nucleon interactions such as the tensor force. Thus the RG reconciles the contrasting pictures of the same experiment and shows how to get correct results using wave functions without SRC components. Our demonstration has implications for the analysis of knockout reactions for which SRC physics is not cleanly isolated.
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