Few-Body Systems最新文献_第9页

Dynamics of Three-Nucleon Systems at 100 MeV 100 兆电子伏下的三核子系统动力学

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-03-13 DOI: 10.1007/s00601-024-01892-7

Izabela Skwira-Chalot, Nasser Kalantar-Nayestanaki, Stanisław Kistryn, Adam Kozela, Elżbieta Stephan

引用次数: 0

Isospin Correlations in Isotope Yields at Intermediate and High Energy Heavy-Ion Collisions 中能和高能重离子碰撞中同位素产率的等空间相关性

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-03-12 DOI: 10.1007/s00601-024-01885-6

R. Ogul, A. S. Botvina, M. Bleicher, N. Buyukcizmeci, A. Ergun, H. Imal

引用次数: 0

Experimental Study of Three-Nucleon Dynamics in the dp Breakup Reaction dp 分裂反应中的三核子动力学实验研究

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-03-11 DOI: 10.1007/s00601-024-01890-9

B. Kłos, for the WASA-at-COSY Collaboration

引用次数: 0

(phi ) Meson Photoproduction on the Nucleon and ({}^4)He Targets 核子和 $${}^4$$ He 靶上的 $$phi $$ 介子光生产

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-03-10 DOI: 10.1007/s00601-024-01894-5

Sang-Ho Kim, T.-S. H. Lee, Seung-il Nam, Yongseok Oh

{"title":"(phi ) Meson Photoproduction on the Nucleon and ({}^4)He Targets","authors":"Sang-Ho Kim, T.-S. H. Lee, Seung-il Nam, Yongseok Oh","doi":"10.1007/s00601-024-01894-5","DOIUrl":"10.1007/s00601-024-01894-5","url":null,"abstract":"<div>We study the reaction mechanism of (phi )-meson photoproduction on the nucleon and ({}^4)He targets by using a dynamical model based on a Hamiltonian. In addition to the dominant contribution of the Pomeron exchange, various meson exchanges are considered in the t channel to describe the CLAS data in the low energy region ({sqrt{s}} = (1.97 - 2.84)) GeV. The direct (phi ) radiations are taken into account in the s- and u-channels. The backward structures at ({sqrt{s}} approx 2.1) and 2.3 GeV are well reproduced by the inclusion of the s-channel (N(2000,5/2^+)) and (N(2300,1/2^+)) resonances, respectively. We also consider the final (phi N) interactions by the gluon exchange, the direct (phi N) interactions, and the box diagrams arising from the couplings with the (pi N), (rho N), (K Lambda ), and (K Sigma ) channels. The effects of the final state interactions are found to be very weak. Then the resulting Hamiltonian is used to study the coherent (gamma {}^4{textrm{He}} rightarrow phi {}^4{textrm{He}}) reaction within the distorted-weave impulse approximation. The calculated differential cross sections account for the LEPS data quite well.</div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"65 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140097376","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

Tests of the Envelope Theory for Three-Body Forces 三体力包络理论测试

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-03-10 DOI: 10.1007/s00601-024-01887-4

Lorenzo Cimino, Clara Tourbez, Cyrille Chevalier, Gwendolyn Lacroix, Claude Semay

引用次数: 0

Metastability of Repulsive Bose–Einstein Condensate in a Finite Trap and Instability of Ground State Energies 有限陷阱中斥力玻色-爱因斯坦凝聚态的可迁移性和基态能量的不稳定性

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-03-07 DOI: 10.1007/s00601-024-01889-2

Pankaj Kumar Debnath

{"title":"Metastability of Repulsive Bose–Einstein Condensate in a Finite Trap and Instability of Ground State Energies","authors":"Pankaj Kumar Debnath","doi":"10.1007/s00601-024-01889-2","DOIUrl":"10.1007/s00601-024-01889-2","url":null,"abstract":"<div>The stability of trapped bosons with repulsive interaction is studied using an approximate many-body calculation. Instead of using the traditional harmonic trapping potential we consider an anharmonic potential of the form (V_{anhar}(r)=frac{1}{2}momega ^{2}r^{2}+lambda r^{4}). In our method, a correlated two-body basis function is used which considers all two-body correlations. It is explained that negative value of anharmonic parameter ((lambda )) are capable to change a stable condensate into a metastable one. Within this metastable condensate, we slowly increase the number of atom (A) and find a collapsing nature of repulsive condensate. The process of collapse of repulsive Bose–Einstein condensation (BEC) is completely different from the collapsing process of attractive BEC and it is explained in details. A dramatic behaviour of interaction energy, kinetic energy, trapping potential energy along with the total ground state energy of this metastable repulsive BEC is observed. We also study the instability of these zero point energies by varying (lambda ) when fixed number of bosons are trapped by the anharmonic well and find critical values of (lambda ) at which the system collapses. When the number of trapped particle is sufficiently high, a close interplay between number of particle and anharmonic strength is observed to remodel the shape of the effective metastable region.</div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"65 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140075136","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

The Vector Planar DKP Oscillator Within a Minimal Length Uncertainty Relation 最小长度不确定性关系内的矢量平面 DKP 振荡器

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-03-05 DOI: 10.1007/s00601-024-01884-7

Amenallah Andolsi, Yassine Chargui, Adel Trabelsi

引用次数: 0

Radiative Neutron Capture Rate of (^{11})B((n,gamma )^{12})B Reaction from the Coulomb Dissociation of (^{12})B 从 $$^{12}$ B 的库仑解离看 $$^{11}$ B $$(n,gamma )^{12}$ B 反应的辐射中子俘获率

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-03-05 DOI: 10.1007/s00601-024-01888-3

Shubhchintak, G. Singh, R. Chatterjee, M. Dan

引用次数: 0

Breakup Amplitudes from the Pseudostate Extension of the Coupled-Reaction-Channels Method 耦合反作用通道法伪态扩展的破裂振幅

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-03-02 DOI: 10.1007/s00601-024-01886-5

Zeki C. Kuruoğlu

{"title":"Breakup Amplitudes from the Pseudostate Extension of the Coupled-Reaction-Channels Method","authors":"Zeki C. Kuruoğlu","doi":"10.1007/s00601-024-01886-5","DOIUrl":"10.1007/s00601-024-01886-5","url":null,"abstract":"<div>A pseudochannel extension of the coupled-reaction-channel (CRC) ansatz had been used in earlier work to simulate the effect of the breakup channel on the rearrangement amplitudes. Comparisons with benchmark results on model systems established that rearrangement amplitudes and total breakup probability could be obtained accurately. However, achieving the same level of accuracy with respect to the state-to-state breakup amplitudes had eluded the earlier attempts that used global bases to generate the pseudo states. With the global bases it is difficult to control the spectrum of pseudostate energies and to obtain an optimal distribution of these pseudo-levels. In the present work, local bases in momentum space of the type used in Finite Element methods are employed. Pseudostates are generated using a local interpolation basis in the relative momentum of the two-body subsystem. Local nature of such a basis allows us to control the density of two-body pseudostates by simply adjusting the distribution of the grid points. In the present work, it is demonstrated that breakup amplitudes can be extracted quantitatively using pseudostates generated from a basis of local piecewise quadratic interpolation polynomials. For a local-potential s-wave model of the (textrm{n}+textrm{d}) scattering, state-to-state breakup amplitudes obtained from the present approach are compared with the benchmark results available in the literature. Results further confirm that pseudostate-extended CRC method is a viable and efficient approach for three-particle scattering.</div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"65 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00601-024-01886-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140019586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Many-Channel Microscopic Model for Resonance Structure in (^{9})Be and (^{9})B: Astrophysical Insights $$^{9}$ Be 和 $$^{9}$ B 中共振结构的多通道微观模型：天体物理学启示

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-02-23 DOI: 10.1007/s00601-024-01881-w

Yuliia Lashko, Victor Vasilevsky, Victor Zhaba

引用次数: 0