Quasi-deuteron model at low renormalization group resolution

Quasi-deuteron model at low renormalization group resolution
复制标题

低重正化群分辨率下的准氘核模型

DOI:
10.1103/physrevc.106.024324
复制
发表时间:
2022
期刊:
影响因子:
3.1
通讯作者:
Hisham, M. A.
Hisham, M. A.
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.;Hisham, M. A.

文献摘要

参考文献

被引文献

相似文献

背景:Levinger提出的准氘模型被用来解释原子核光吸收过程中高动量质子的碰撞截面。这是在一个框架内,我们表征为表现出高重整化群(RG)的分辨率。假设一个单体反应算符,核子波函数必须包含具有类氘量子数的两体短程关联(SRC)。在Phys.Rev.C104,034311(2021)2469-998510.1103/PhysRevC.104.034311中,我们证明了SRC物理可以在低RG分辨率下自然地解释。目的:在这里,我们描述了低RG分辨率下的准氘核模型,并确定了Levinger常数,它与氘核的光吸收与光衰变的比率成正比。方法:我们基于高相对动量分布的比率提取Levinger常数。我们计算的动量分布下的相似RG(SRG)变换SRC物理转移到运营商作为一个通用的两体项。该算子的短程性质促使在计算核矩阵元时使用具有不相关波函数的局域密度近似,这大大简化了分析。操作员必须始终与RG规模和相互作用方案相匹配,以进行可靠的提取。我们将SRG变换应用到不同的核子-核子(NN)相互作用中,并利用氘核波函数和温伯格本征值来确定近似的匹配标度.结果:我们预测了几种NN相互作用和大范围核的Levinger常数,并与实验结果进行了比较.结论:当从硬NN相互作用和初始算符开始时,在低RG分辨率下的预测与实验符合得很好.类似的协议被发现使用软NN相互作用时,额外的两体算子引起的进化从硬到软。
Background:The quasi-deuteron model introduced by Levinger is used to explain cross sections for knocking out high-momentum protons in photoabsorption on nuclei. This is within a framework we characterize as exhibiting high renormalization group (RG) resolution. Assuming a one-body reaction operator, the nuclear wave function must include two-body short-range correlations (SRCs) with deuteronlike quantum numbers. In Phys. Rev. C 104, 034311 (2021)2469-998510.1103/PhysRevC.104.034311, we showed that SRC physics can be naturally accounted for atlowRG resolution.Purpose:Here we describe the quasi-deuteron model at low RG resolution and determine the Levinger constant, which is proportional to the ratio of nuclear photoabsorption to that for photodisintegration of a deuteron.Method:We extract the Levinger constant based on the ratio of momentum distributions at high relative momentum. We compute momentum distributions evolved under similarity RG (SRG) transformations where the SRC physics is shifted into the operator as a universal two-body term. The short-range nature of this operator motivates using local-density approximations with uncorrelated wave functions in evaluating nuclear matrix elements, which greatly simplifies the analysis. The operator must be consistently matched to the RG scale and scheme of the interaction for a reliable extraction. We apply SRG transformations to different nucleon-nucleon (NN) interactions and use the deuteron wave functions and Weinberg eigenvalues to determine approximate matching scales.Results:We predict the Levinger constant for several NN interactions and a wide range of nuclei comparing to experimental extractions.Conclusions:The predictions at low RG resolution are in good agreement with experiment when starting with a hard NN interaction and the initial operator. Similar agreement is found using soft NN interactions when the additional two-body operator induced by evolution from hard to soft is included.
核物质是否会因低动量相互作用而产生微扰?
DOI: 10.1016/j.nuclphysa.2005.08.024
发表时间: 2005
期刊: Nuclear Physics
影响因子: --
作者:
S. Bogner;A. Schwenk;R. Furnstahl;A. Nogga
通讯作者: A. Nogga
DOI: 10.1038/s41586-020-2021-6
发表时间: 2020-02
期刊: Nature
影响因子: 64.8
作者:
A. Schmidt;J. Pybus;R. Weiss;E. Segarra;A. Hrnjic;A. Denniston;O. Hen;E. Piasetzky;L. Wein
通讯作者: A. Schmidt;J. Pybus;R. Weiss;E. Segarra;A. Hrnjic;A. Denniston;O. Hen;E. Piasetzky;L. Wein
DOI: 10.1016/0375-9474(81)90516-9
发表时间: 1981-09
期刊: Nuclear Physics
影响因子: --
作者:
A. Lepretre;H. Beil;R. Bergère;P. Carlos;J. Fagot;A. Miniac;A. Veyssière
通讯作者: A. Lepretre;H. Beil;R. Bergère;P. Carlos;J. Fagot;A. Miniac;A. Veyssière
DOI: 10.1038/s41586-019-0925-9
发表时间: 2019-02
期刊: Nature
影响因子: 64.8
作者:
B. M. A. O. S. E. M. L. B. S. M. A. H. J. I. L. M. M. Schmookler Duer Schmidt Hen Gilad Piasetzky Strikm-B.-M.-A.-O.-S.-E.-M.-L.-B.-S.-M.-A.-H.-J.-I.-L.-M.-2080539512;B. Schmookler;M. Duer;A. Schmidt
通讯作者: B. M. A. O. S. E. M. L. B. S. M. A. H. J. I. L. M. M. Schmookler Duer Schmidt Hen Gilad Piasetzky Strikm-B.-M.-A.-O.-S.-E.-M.-L.-B.-S.-M.-A.-H.-J.-I.-L.-M.-2080539512;B. Schmookler;M. Duer;A. Schmidt
使用 25 至 106 MeV 之间的准单色光子测量的 Pb 总光核吸收截面
DOI: --
发表时间: 1978
期刊:
影响因子: --
作者:
A. Lepretre;H. Beil;R. Bergère;P. Carlos;J. Fagot;A. Veyssière;J. Ahrens;P. Axel;U. Kneissl
通讯作者: U. Kneissl