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Investigation of breakup process in 9Be(α,n)12C reaction 9Be(α,n)12C 反应破裂过程研究
IF 1.4 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Pub Date : 2024-05-07 DOI: 10.1016/j.nuclphysa.2024.122890
Ritika Datta , K. Banerjee , Sujoy Chatterjee , Rajkumar Santra , R. Shil , S. Manna , Pratap Roy , T.K. Rana , G. Mukherjee , T.K. Ghosh , A.S. Roy , A. Sen , S. Kundu , Anirudhha Dey , P. Karmakar , D. Pandit , A.K. Bakshi , B.K. Sapra , C. Bhattacharyya

Neutron energies and angular distributions were measured in 9Be(α,n)12C reaction for α energies of 5.5 and 6.5 MeV. Three major neutron groups were observed in the spectrum, which correspond to the ground and first two excited states of 12C. Measured data could only be explained by the TALYS calculation if reaction at more than one location within the target is considered for a given beam energy. The preferred locations are driven by the resonance energy levels existing in 13C. Neutron yield due to the 9Be breakup process was determined which is found to be 12.6 ± 0.2% and 18.4 ± 0.5% of the total reaction cross-section for 5.5 and 6.5 MeV respectively.

测量了 9Be(α,n)12C反应中α能量为 5.5 和 6.5 MeV 的中子能量和角度分布。光谱中观察到三个主要的中子群,分别对应于 12C 的基态和前两个激发态。只有在给定射束能量的情况下,考虑靶内多个位置的反应,TALYS 计算才能解释测量数据。首选位置是由 13C 中存在的共振能级驱动的。测定了 9Be 分裂过程的中子产率,发现在 5.5 和 6.5 MeV 时,其产率分别为总反应截面的 12.6 ± 0.2% 和 18.4 ± 0.5%。
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引用次数: 0
A systematic study of the ground state properties of gold nuclei near the neutron drip line using HFB formalism 利用 HFB 形式对中子滴落线附近金核基态性质的系统研究
IF 1.4 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Pub Date : 2024-05-03 DOI: 10.1016/j.nuclphysa.2024.122889
Anjana A V, Nicemon Thomas, Antony Joseph

In this theoretical work, the ground state properties like binding energy per nucleon, two-neutron separation energy, two-neutron shell gap, neutron-pairing gap, neutron rms radii, proton rms radii, charge radii, neutron skin thickness and nucleon density distributions of odd-even and odd-odd gold isotopes (A165265u) were systematically studied. Computations were performed for a wide mass range of gold nuclei, spanned from the proton-rich side to the neutron-rich side, following the Hartree-Fock-Bogoliubov theory. Based on this approach, the nuclear structure of gold isotopes lying up to the exotic neutron rich region where the experimental data are not available, was also investigated. Calculations, taking into account the UNEDF0 Skyrme effective interaction, reproduce the available experimental data and results of other nuclear model based estimations, such as the Relativistic-Continuum-Hartree-Bogoliubov theory and the Finite Range Droplet Models, reasonably well.

在这项理论研究中,系统地研究了奇偶和奇多金同位素(A165-265u)的基态性质,如每个核子的结合能、两中子分离能、两中子壳间隙、中子配对间隙、中子均方根半径、质子均方根半径、电荷半径、中子皮厚和核子密度分布。按照哈特里-福克-波哥留布夫理论,对从质子富集侧到中子富集侧的宽质量范围的金原子核进行了计算。在此基础上,还研究了金同位素的核结构,直至无法获得实验数据的奇异富中子区域。考虑到 UNEDF0 Skyrme 有效相互作用的计算结果合理地再现了现有的实验数据和其他基于核模型的估计结果,如相对论-连续真空-哈特里-波哥留波夫理论和有限范围液滴模型。
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引用次数: 0
Probing deformed nuclei: Experimental insights into excited states of 152,153,154Gd isotopes through fusion-evaporation reactions 探测变形核:通过聚变-蒸发反应对 152、153、154钆同位素激发态的实验启示
IF 1.4 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Pub Date : 2024-05-03 DOI: 10.1016/j.nuclphysa.2024.122888
S. Pelonis , T.J. Mertzimekis , A. Chalil , P. Vasileiou , A. Zyriliou , G. Zagoraios , D. Papaioannou , F.C.L. Crespi , A. Bracco , N. Florea , N. Marginean , L. Stan , A. Turturica

The rare-earth region has been the focus of various studies aiming at the understanding of nuclear structure and providing information on the details of the reaction mechanism. The Gd isotopes belong to this group of nuclei and despite the available spectroscopic information, several open questions about their structure still exist, such as the inter-band transitions related to shape evolution or branching-ratios in deformed states. In addition, production cross sections of different reactions to Gd isotopes are largely unknown.

In this work, we report on an experimental attempt to populate the excited states in the isotopes 152,153,154Gd by employing the heavy-ion fusion reaction 18O+138Ba → 156-xGd + xn in the 58-64 MeV energy range (center-of-mass). The experiment was conducted at the 9 MV FV Pelletron Tandem at the Horia Hulubei National Institute for Physics and Nuclear Engineering, employing the ROSPHERE array. Several branching-ratios for energy levels in 152,153Gd have been measured, offering new and updated values. Furthermore, relative cross sections regarding the fusion-evaporation reactions 138Ba(18O, 4n)152Gd, 138Ba(18O, 3n)153Gd, and 138Ba(18O, 2n)154Gd have been measured and compared with theoretical calculations with PACE4.

稀土区域一直是各种研究的焦点,这些研究旨在了解核结构并提供有关反应机制细节的信息。钆同位素属于这一类核,尽管已有光谱信息,但有关其结构的一些未决问题仍然存在,例如与形状演变有关的带间转变或变形态中的支化比。在这项工作中,我们报告了利用重离子聚变反应 18O+138Ba → 156-xGd + xn 在 58-64 MeV 能量范围(质量中心)内填充同位素 152、153、154Gd 激发态的实验尝试。实验是在 Horia Hulubei 国家物理与核工程研究所的 9 MV FV Pelletron Tandem 上利用 ROSPHERE 阵列进行的。对 152、153钆能级的几个分支比进行了测量,提供了新的和更新的数值。此外,还测量了 138Ba(18O,4n)152Gd、138Ba(18O,3n)153Gd 和 138Ba(18O,2n)154Gd 核聚变-蒸发反应的相对截面,并将其与 PACE4 的理论计算结果进行了比较。
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引用次数: 0
Kink of the nuclear charge radius isotope shift and overlaps of the neutron and proton orbitals in lead 铅的核电荷半径同位素移动和中子与质子轨道重叠的扭结
IF 1.4 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Pub Date : 2024-04-25 DOI: 10.1016/j.nuclphysa.2024.122883
S. Marcos , R. Niembro , M. López-Quelle

Within the relativistic mean field approximation, we analyse the kink effect (KE) in the evolution of the charge radius isotope shift of lead isotopes as a function of the neutron number N. We show that if the interactions between neutron and proton states responsible for the KE are assumed to be proportional either to the overlaps of their corresponding wave functions or to those of their corresponding probability density distributions, it is not possible, by themselves, to explain the KE. However, we find that the small component of the single-particle Dirac spinors plays a relevant role in the kink formation. By considering the contribution of the N126 valence neutrons to the proton central potential, we can explain the generation of the KE and why neutrons in the 1i11/2 orbital are more kinky than when they are in the 2g9/2 orbital.

在相对论均场近似中,我们分析了铅同位素电荷半径同位素位移演变中的 "扭结效应"(KE)与中子数 N 的函数关系。我们发现,如果假定造成 "扭结效应 "的中子态和质子态之间的相互作用与其相应波函数的重叠或其相应概率密度分布的重叠成比例,那么这种相互作用本身并不能解释 "扭结效应"。然而,我们发现单粒子狄拉克旋子的小分量在扭结形成中起着相关作用。通过考虑N-126价中子对质子中心势的贡献,我们可以解释KE的产生,以及为什么处于1i11/2轨道的中子比处于2g9/2轨道的中子更加扭结。
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引用次数: 0
Probing the structure of X(3872) in photoproduction 探测光生成中的 X(3872) 结构
IF 1.4 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Pub Date : 2024-04-22 DOI: 10.1016/j.nuclphysa.2024.122876
E.Ya. Paryev

We study the production of X(3872) mesons in photon-induced nuclear reactions near the threshold within the collision model based on the nuclear spectral function. The model accounts for direct photon-nucleon X(3872) production processes as well as five different scenarios for their internal structure. We calculate the absolute and relative excitation functions for X(3872) production off 12C and 184W target nuclei at near-threshold incident photon energies of 8–16 GeV, the absolute differential cross sections for their production off these target nuclei at laboratory angles of 0–10 and for incident photon energy of 13 GeV as well as the A dependences of the relative (transparency ratios) cross sections for X(3872) production from γA collisions at photon energies around 13 GeV within the adopted scenarios for the X(3872) meson internal structure. We show that the absolute and relative observables considered reveal distinct sensitivity to these scenarios. Therefore, the measurement of such observables in a dedicated experiment at the CEBAF facility in the near-threshold energy range will allow us to get valuable information on the X(3872) inner structure.

我们在基于核谱函数的碰撞模型中研究了X(3872)介子在阈值附近的光子诱导核反应中的产生。该模型考虑了光子-核子 X(3872)的直接产生过程及其内部结构的五种不同情况。我们计算了在 8-16 GeV 的近阈值入射光子能量下,12C 和 184W 靶核产生 X(3872) 的绝对和相对激发函数、在实验室角度为0∘-10∘和入射光子能量为13 GeV的条件下,从这些靶核产生X(3872)的绝对差分截面,以及在X(3872)介子内部结构所采用的方案中,在光子能量为13 GeV左右的γA对撞中产生X(3872)的相对(透明度比)截面的A依赖关系。我们的研究表明,所考虑的绝对和相对观测指标对这些情景具有不同的敏感性。因此,在CEBAF设施的专门实验中,在近阈值能量范围内测量这些观测指标,将使我们能够获得有关X(3872)内部结构的宝贵信息。
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引用次数: 0
The study on the multiplicity dependence of ridge behavior in pp collisions at s=13 TeV at the LHC 关于大型强子对撞机上 s=13 TeV pp 对撞中脊行为的倍率依赖性的研究
IF 1.4 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Pub Date : 2024-04-18 DOI: 10.1016/j.nuclphysa.2024.122875
Jeongseok Yoon, Jin-Hee Yoon

The long-range near-side ridge phenomenon in two-particle correlation is one of the key issues in studying the strong interaction. In particular, the hydrodynamic flow effect of the quark-gluon plasma (QGP) has explained it well for heavy-ion collisions, but is limited in its ability to explain the phenomenon in small systems. The Momentum Kick Model (MKM), on the other hand, suggests a fundamental explanation of the phenomenon through the kinematic process; the high-momentum jet particles collide with medium partons, transfer their momentum to them (called the “kick” process), and induce collective motion of the kicked-partons resulting in the ridge phenomenon. This MKM has successfully described the ridge structure in heavy-ion collisions at the RHIC. Furthermore, since the ridge phenomenon in small systems is prominent in high-multiplicity events, the MKM with multiplicity dependence (MKMwM) has been studied in pp collisions at the LHC using a relationship between the number of kicked-partons and the multiplicity through the impact parameter. In this research, we extend the previous study with more recent experimental data-driven parameters and apply them to the new measurements that have a wider multiplicity range with pT and ΔΦ bins at the LHC. We also predict the ridge structure at the energies scheduled by the LHC in the upcoming Run 3 experiments.

双粒子相关中的长程近侧脊现象是研究强相互作用的关键问题之一。特别是夸克-胶子等离子体(QGP)的流体动力流效应在重离子碰撞中很好地解释了这一现象,但在解释小系统中的这一现象时能力有限。另一方面,"动量踢模型"(MKM)通过运动过程提出了对这一现象的基本解释:高动量射流粒子与中等粒子碰撞,将自己的动量传递给它们(称为 "踢 "过程),并引起被踢粒子的集体运动,从而产生脊现象。这种 MKM 成功地描述了 RHIC 重离子碰撞中的脊结构。此外,由于小系统中的脊现象在高倍率事件中非常突出,因此在大型强子对撞机的pp对撞中研究了具有倍率依赖性的MKM(MKMwM),通过撞击参数来研究被踢质子数量与倍率之间的关系。在这项研究中,我们用最新的实验数据驱动参数扩展了之前的研究,并将其应用于在大型强子对撞机上进行的具有更宽倍率范围的 pT 和 ΔΦ bins 的新测量。我们还预测了大型强子对撞机在即将进行的第 3 运行实验中预定能量下的脊结构。
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引用次数: 0
The present and future of QCD QCD 的现状与未来
IF 1.4 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Pub Date : 2024-04-15 DOI: 10.1016/j.nuclphysa.2024.122874
P. Achenbach , D. Adhikari , A. Afanasev , F. Afzal , C.A. Aidala , A. Al-bataineh , D.K. Almaalol , M. Amaryan , D. Androić , W.R. Armstrong , M. Arratia , J. Arrington , A. Asaturyan , E.C. Aschenauer , H. Atac , H. Avakian , T. Averett , C. Ayerbe Gayoso , X. Bai , K.N. Barish , M. Zurek

This White Paper presents an overview of the current status and future perspective of QCD research, based on the community inputs and scientific conclusions from the 2022 Hot and Cold QCD Town Meeting. We present the progress made in the last decade toward a deep understanding of both the fundamental structure of the sub-atomic matter of nucleon and nucleus in cold QCD, and the hot QCD matter in heavy ion collisions. We identify key questions of QCD research and plausible paths to obtaining answers to those questions in the near future, hence defining priorities of our research over the coming decades.

本白皮书基于 2022 年冷热 QCD 镇会议的社区意见和科学结论,概述了 QCD 研究的现状和未来展望。我们介绍了过去十年在深入理解冷QCD中核子和原子核亚原子物质的基本结构以及重离子碰撞中热QCD物质方面所取得的进展。我们确定了 QCD 研究的关键问题以及在不久的将来获得这些问题答案的可行路径,从而确定了我们未来几十年的研究重点。
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引用次数: 0
QCD parameters and SM-high precision from e+e−→ Hadrons: Updated 来自e+e-→强子的QCD参数和SM-高精度更新
IF 1.4 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Pub Date : 2024-04-12 DOI: 10.1016/j.nuclphysa.2024.122873
Stephan Narison
<div><p><strong>1.</strong> I report an update of my previous comparison of the theoretical value of the muon anomaly <span><math><msub><mrow><mi>a</mi></mrow><mrow><mi>μ</mi></mrow></msub><mo>≡</mo><mfrac><mrow><mn>1</mn></mrow><mrow><mn>2</mn></mrow></mfrac><msub><mrow><mo>(</mo><mi>g</mi><mo>−</mo><mn>2</mn><mo>)</mo></mrow><mrow><mi>μ</mi></mrow></msub></math></span> with the new measurement. One finds: <span><math><mi>Δ</mi><msub><mrow><mi>a</mi></mrow><mrow><mi>μ</mi></mrow></msub><mo>≡</mo><msubsup><mrow><mi>a</mi></mrow><mrow><mi>μ</mi></mrow><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow></msubsup><mo>−</mo><msubsup><mrow><mi>a</mi></mrow><mrow><mi>μ</mi></mrow><mrow><mi>t</mi><mi>h</mi></mrow></msubsup><mo>=</mo><mo>(</mo><mn>143</mn><mo>±</mo><msub><mrow><mn>42</mn></mrow><mrow><mi>t</mi><mi>h</mi></mrow></msub><mo>±</mo><msub><mrow><mn>22</mn></mrow><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow></msub><mo>)</mo><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>11</mn></mrow></msup></math></span> indicating about 3<em>σ</em> discrepancy between the SM predictions and experiment.</p><p><strong>2.</strong> I improve the estimate of QCD power corrections up to dimension <span><math><mi>D</mi><mo>=</mo><mn>12</mn></math></span> and provide a new estimate of the ones up to <span><math><mi>D</mi><mo>=</mo><mn>20</mn></math></span> within the Shifman-Vainshtein-Zahkarov (SVZ) expansion by combining the ratio of the SVZ Borel/Laplace sum rules (LSR) with the Braaten-Pich and the author (BNP) <em>τ</em>-like decay moments for the <span><math><mi>I</mi><mo>=</mo><mn>1</mn></math></span> vector current. The results summarized in Table 1 confirm a violation of the factorization of the four-quark condensates and the value of the gluon one <span><math><mo>〈</mo><msub><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow></msub><msup><mrow><mi>G</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>〉</mo></math></span> from some other sources. Up to <span><math><mi>D</mi><mo>=</mo><mn>20</mn></math></span>, I do not observe any factorial nor exponential growth of the size of these power corrections.</p><p><strong>3.</strong> I use these new values of power corrections to extract <span><math><msub><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span> from the BNP lowest moment. To order <span><math><msubsup><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow><mrow><mn>4</mn></mrow></msubsup></math></span>, I find within the SVZ expansion: <span><math><msub><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow></msub><mo>(</mo><msub><mrow><mi>M</mi></mrow><mrow><mi>τ</mi></mrow></msub><mo>)</mo><mo>=</mo><mn>0.3081</mn><msub><mrow><mo>(</mo><mn>50</mn><mo>)</mo></mrow><mrow><mi>f</mi><mi>i</mi><mi>t</mi></mrow></msub><msub><mrow><mo>(</mo><mn>71</mn><mo>)</mo></mrow><mrow><msubsup><mrow><mi>α</mi></mrow><mrow><mi>s</mi></mrow><mrow><mn>5</mn></mrow></msubsup></mrow></msub></math></span> [resp. <span><math><mn>0.3260</mn><msub><mrow><mo>(</mo><mn>47</mn><mo>)</mo></m
1.我报告了我之前将μ介子异常的理论值 aμ≡12(g-2)μ 与新的测量值进行比较的最新情况。我们发现:Δaμ≡aμexp-aμth=(143±42th±22exp)×10-11表明SM预言和实验之间存在大约3σ的差异。我在 Shifman-Vainshtein-Zahkarov (SVZ)扩展中,通过将 SVZ 的 Borel/Laplace sum rules (LSR) 与 I=1 矢量电流的 Braaten-Pich and the author (BNP) τ-like decay moments 之比结合起来,改进了对 QCD 功率修正到 D=12 维的估计,并提供了对 QCD 功率修正到 D=20 维的新估计。表 1 总结的结果证实了四夸克凝聚态的因式分解和来自其他来源的胶子一〈αsG2〉值的违反。我使用这些新的幂修正值从 BNP 最低矩中提取 αs。对于 αs4 阶,我在 SVZ 扩展中发现:αs(Mτ)=0.3081(50)fit(71)αs5 [resp. 0.3260(47)fit(62)αs5] 意味着固定阶(FO)[respect. Contour Improved (CI)]PT 序列的αs(MZ)=0.1170(6)(3)evol [resp. 0.1192(6)(3)evol]。它们得出的平均值为:αs(Mτ)|SVZ=0.3180(58)fit(99)syst 和 αs(MZ)|SVZ=0.1182(14)(3)evol,其中系统误差(syst)考虑了 FO 和 CI 结果之间的差异。利用最低 BNP 矩,我们还从τ-衰变数据的 V+A 部分得到:αs(Mτ)|τ,V+A=0.3040(76)fit(68)syst,从而得到:αs(MZ)|τ,V+A=0.1166(8)(3)evol。e+e-和τ-衰变的两个测定值的平均值是:〈αs(Mτ)〉=0.3111(71),这意味着〈αs(MZ)〉=0.1174(10)(3)evol.4。 第10节和第11节讨论了SVZ扩展之外的一些(最终)贡献(1/Q2、瞬子和对偶违反)。
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One finds: &lt;span&gt;&lt;math&gt;&lt;mi&gt;Δ&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;μ&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;≡&lt;/mo&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;μ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;mi&gt;p&lt;/mi&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;μ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;t&lt;/mi&gt;&lt;mi&gt;h&lt;/mi&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;143&lt;/mn&gt;&lt;mo&gt;±&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mn&gt;42&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;t&lt;/mi&gt;&lt;mi&gt;h&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;±&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mn&gt;22&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;e&lt;/mi&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;mi&gt;p&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;mo&gt;×&lt;/mo&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;11&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; indicating about 3&lt;em&gt;σ&lt;/em&gt; discrepancy between the SM predictions and experiment.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;2.&lt;/strong&gt; I improve the estimate of QCD power corrections up to dimension &lt;span&gt;&lt;math&gt;&lt;mi&gt;D&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;12&lt;/mn&gt;&lt;/math&gt;&lt;/span&gt; and provide a new estimate of the ones up to &lt;span&gt;&lt;math&gt;&lt;mi&gt;D&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;20&lt;/mn&gt;&lt;/math&gt;&lt;/span&gt; within the Shifman-Vainshtein-Zahkarov (SVZ) expansion by combining the ratio of the SVZ Borel/Laplace sum rules (LSR) with the Braaten-Pich and the author (BNP) &lt;em&gt;τ&lt;/em&gt;-like decay moments for the &lt;span&gt;&lt;math&gt;&lt;mi&gt;I&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/math&gt;&lt;/span&gt; vector current. The results summarized in Table 1 confirm a violation of the factorization of the four-quark condensates and the value of the gluon one &lt;span&gt;&lt;math&gt;&lt;mo&gt;〈&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;G&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;〉&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; from some other sources. Up to &lt;span&gt;&lt;math&gt;&lt;mi&gt;D&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;20&lt;/mn&gt;&lt;/math&gt;&lt;/span&gt;, I do not observe any factorial nor exponential growth of the size of these power corrections.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;3.&lt;/strong&gt; I use these new values of power corrections to extract &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; from the BNP lowest moment. To order &lt;span&gt;&lt;math&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/math&gt;&lt;/span&gt;, I find within the SVZ expansion: &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;M&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;τ&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0.3081&lt;/mn&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;50&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;mi&gt;i&lt;/mi&gt;&lt;mi&gt;t&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;71&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;msubsup&gt;&lt;mrow&gt;&lt;mi&gt;α&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;s&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/msubsup&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; [resp. &lt;span&gt;&lt;math&gt;&lt;mn&gt;0.3260&lt;/mn&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;47&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/m","PeriodicalId":19246,"journal":{"name":"Nuclear Physics A","volume":"1046 ","pages":"Article 122873"},"PeriodicalIF":1.4,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140619250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Corrigendum to “Optical potential parameters of light nuclear fusion based on precise Coulomb wave functions” [Nuclear Physics A 1017 (2022) 1-12 122340] 基于精确库仑波函数的轻核聚变光学势能参数》更正 [Nuclear Physics A 1017 (2022) 1-12 122340]
IF 1.4 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Pub Date : 2024-04-11 DOI: 10.1016/j.nuclphysa.2024.122870
Binbing Wu , Hao Duan , Jie Liu
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引用次数: 0
Structures of terminating bands in Er isotopes 铒同位素终止带的结构
IF 1.4 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR Pub Date : 2024-04-05 DOI: 10.1016/j.nuclphysa.2024.122871
Mohadese Shayestefar, Azam Kardan

The configurations of terminating bands in Er isotopes are investigated using the unpaired cranked Nilsson-Strutinsky (CNS), and the paired cranked Nilsson-Strutinsky-Bogoliubov (CNSB) models and also, new CNS(B) formalism. The calculated excitation energies of the bands have been compared with the experimental findings, and good agreements are observed. Our calculations show that the CNS(B) approach successfully is in agreement CNSB predictions and experimental results. Some systematics of terminating bands in erbium isotopes are also discussed.

利用非配对曲柄尼尔森-斯特鲁汀斯基(CNS)模型、配对曲柄尼尔森-斯特鲁汀斯基-波哥留布夫(CNSB)模型以及新的 CNS(B) 形式主义,研究了 Er 同位素中终止带的构型。计算得到的带激发能量与实验结果进行了比较,结果显示两者吻合良好。我们的计算表明,CNS(B) 方法成功地实现了 CNSB 预测与实验结果的一致。我们还讨论了铒同位素中终止带的一些系统性。
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引用次数: 0
期刊
Nuclear Physics A
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