Few-Body Systems最新文献

Bound and Resonance States of Highly Charged H- and He-like Ions Under Dense Quantum Plasma Environment 高密度量子等离子体环境下高荷电氢离子和类氢离子的束缚态和共振态

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2025-01-13 DOI: 10.1007/s00601-024-01979-1

A. N. Sil, G. Barik, S. Dutta, S. Mondal, J. K. Saha, T. K. Mukhopadhyay

{"title":"Bound and Resonance States of Highly Charged H- and He-like Ions Under Dense Quantum Plasma Environment","authors":"A. N. Sil, G. Barik, S. Dutta, S. Mondal, J. K. Saha, T. K. Mukhopadhyay","doi":"10.1007/s00601-024-01979-1","DOIUrl":"10.1007/s00601-024-01979-1","url":null,"abstract":"<div>The impact of the dense quantum plasma on the bound (1sns; (^1)S(^e)) [(n=1-5)] and a few low-lying doubly excited resonance (2sns, 2pnp; (^1)S(^e)) [(n=2-3)] states of various two-electron highly charged He-like C(^{4+}), Mg(^{10+}), Al(^{11+}), Si(^{12+}), S(^{14+}) and Ar(^{16+}) ions has been studied using an explicitly correlated multi-exponent Hylleraas type basis set under the framework of Ritz variational method. Utilizing the state-of-art stabilization technique, the bound states properties and the resonance parameters (energy and width) are determined under different plasma conditions. Ionization potential depression with respect to the plasma screening length is rigorously investigated for both the bound and resonance states. The width (or the lifetime) of the resonance states originating from different electronic configurations follows unique patterns with respect to the plasma screening length. Most of the data for the resonance parameters are being reported here for the first time in the literature.</div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"66 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142963153","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

Klein-Gordon Oscillator Subject to a Coulomb-type Potential in Bonnor-Melvin Universe with a Cosmological Constant 具有宇宙常数的波诺-梅尔文宇宙中受库仑势影响的克莱因-戈登振子

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-12-24 DOI: 10.1007/s00601-024-01978-2

L. G. Barbosa, C. C. Barros Jr.

引用次数: 0

Production Cross-Section of (gamma )-Rays from (p,p(^prime gamma )) Reactions: Measurements and Theoretical Analysis 从(p,p(^prime gamma ))产生(gamma )-射线的生产截面反应：测量和理论分析

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-12-18 DOI: 10.1007/s00601-024-01976-4

I. Mazumdar, S. P. Weppner, V. Ranga

{"title":"Production Cross-Section of (gamma )-Rays from (p,p(^prime gamma )) Reactions: Measurements and Theoretical Analysis","authors":"I. Mazumdar, S. P. Weppner, V. Ranga","doi":"10.1007/s00601-024-01976-4","DOIUrl":"10.1007/s00601-024-01976-4","url":null,"abstract":"<div>This paper reviews our work on the measurements of absolute production cross sections of (gamma )-rays from the (p,p(^{prime }gamma )) reactions on (^{12})C and (^{16})O. The measurements cover a range of 8–16 MeV for the incident proton beam. The angular distributions of the (gamma )-rays have been measured. A detailed phenomenological analysis within the framework of optical model formalism has been carried out to reproduce the experimental data. The existing global set of elastic, polarization and total reaction data for protons and neutrons have been used to generate the optical model potential. The nuclear structure effects have been included in the calculations by considering the roles of coupling of the low-lying states, the presence of resonances and nuclear deformations. The potentials so generated have been used to calculate the differential and total cross sections for both (p,p(^prime )) and (p,p(^prime gamma )) reactions. The results of the analysis are in good agreement with the measured data for the observed (gamma )-rays. However, discrepancies still exist in reproducing the finer details of the cross sections. The existing discrepancies between our phenomenological analysis and the experimental data demonstrate the rather complex roles of channel couplings, resonances in the compound nuclear system and target deformation. The significant contribution of nuclear structure effects in light mass nucleus like (^{12})C and (^{16})O, leads to an apparent loss of predictive power of the theoretical calculation for low-energy region (less than 10 MeV) of the projectile energy.</div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"66 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00601-024-01976-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844945","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

Test of the Charge Symmetry Hypothesis of NN Interaction from the Coulomb-Free p–p Scattering Cross Section and Its Relation to Universality 从无库仑 p-p 散射截面检验 NN 相互作用的电荷对称性假说及其与普遍性的关系

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-12-14 DOI: 10.1007/s00601-024-01975-5

Aurora Tumino, Alejandro Kievsky, Giuseppe Rapisarda, Marco La Cognata, Alessandro A. Oliva, Carlos Bertulani, Giuseppe D’Agata, Mario Gattobigio, Giovanni L. Guardo, Livio Lamia, Dario Lattuada, Rosario G. Pizzone, Stefano Romano, Maria L. Sergi, Roberta Spartà, Michele Viviani

{"title":"Test of the Charge Symmetry Hypothesis of NN Interaction from the Coulomb-Free p–p Scattering Cross Section and Its Relation to Universality","authors":"Aurora Tumino, Alejandro Kievsky, Giuseppe Rapisarda, Marco La Cognata, Alessandro A. Oliva, Carlos Bertulani, Giuseppe D’Agata, Mario Gattobigio, Giovanni L. Guardo, Livio Lamia, Dario Lattuada, Rosario G. Pizzone, Stefano Romano, Maria L. Sergi, Roberta Spartà, Michele Viviani","doi":"10.1007/s00601-024-01975-5","DOIUrl":"10.1007/s00601-024-01975-5","url":null,"abstract":"<div>We examine the results on the determination of the Coulomb-free 1(S_0) proton–proton (p–p) scattering length by analyzing the cross section of the quasi-free p + d (rightarrow ) p + p + n reaction at center-of-mass energies below 1 MeV. This was achieved using a Bayesian data-fitting approach, yielding a p–p scattering length (a_{pp} = -18.17^{+0.52}_{-0.58}|_{stat}pm 0.01_{syst}) fm and effective range (r_0 = 2.80pm 0.05_{stat}pm 0.001_{syst}) fm. We test the stability of the results against the upper energy cutoff and fitting data sets separately. A model based on the Eckart potential is introduced for an effective description in the universal window. In this model, the short-range interaction is considered as a whole, similar to how the s-wave phase-shift (delta ) functions in describing low-energy nucleon–nucleon scattering data. Based on our analysis, we confirm that the obtained parameters accurately represent the characteristics of the short-range physics and the influence of the up-down quark mass difference on the charge symmetry breaking is less significant as initially anticipated. Additionally, we suggest evaluating the charge symmetry breaking of the short-range interaction rather than solely focusing on the nuclear interaction.</div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"66 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142821413","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

Isospin Symmetry of (omega ) Meson at Finite Temperature in the Soft-Wall Model of Holographic QCD 有限温度下(omega )介子在全息QCD软壁模型中的同位旋对称性

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-12-13 DOI: 10.1007/s00601-024-01977-3

Narmin Nasibova

{"title":"Isospin Symmetry of (omega ) Meson at Finite Temperature in the Soft-Wall Model of Holographic QCD","authors":"Narmin Nasibova","doi":"10.1007/s00601-024-01977-3","DOIUrl":"10.1007/s00601-024-01977-3","url":null,"abstract":"<div>The coupling constants of (rho ) meson-nucleon and (omega ) meson-nucleon are connected through the isospin relation. Using the soft-wall model of holographic QCD, the current work aims to examine the violation (if any) of isospin symmetry of the (omega )-meson as well as the temperature dependency of the (omega )-meson-(Delta ) and (omega )-meson-nucleon-(Delta ) baryon coupling constants. Applying the temperature-dependent profile functions of the vector and fermion fields to the expression of the coupling constants in the model yields the temperature dependence of the coupling constants. The minimum and magnetic type interactions between vector and fermion fields in 5-dimensional AdS space-time are included in the written interaction Lagrangian terms. The temperature dependence of the coupling constants (g_{omega N N}(T)), (g_{omega Delta Delta }(T)), and (g_{omega N Delta }(T)) has been investigated. Comparing (g_{omega NN}(T)) with the coupling constant (g_{rho NN}(T)), it is found that the isospin symmetry of the (omega ) and (rho ) mesons is not violated at the finite temperature. It is also observed that the coupling constant of the (omega ) meson with baryons decreases as the temperature increases, and this coupling constant becomes zero near the confinement-deconfinement phase transition temperature.</div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"66 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142811270","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

Cross Section Calculation of H–He Collisions using Three-Electron Close-Coupling Method 用三电子紧密耦合法计算H-He碰撞截面

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-12-11 DOI: 10.1007/s00601-024-01974-6

Akinori Igarashi, Daiji Kato

引用次数: 0

Folding Procedure for (Omega )-(alpha ) Potential 折叠程序(Omega ) - (alpha )电位

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-11-30 DOI: 10.1007/s00601-024-01973-7

I. Filikhin, R. Ya. Kezerashvili, B. Vlahovic

{"title":"Folding Procedure for (Omega )-(alpha ) Potential","authors":"I. Filikhin, R. Ya. Kezerashvili, B. Vlahovic","doi":"10.1007/s00601-024-01973-7","DOIUrl":"10.1007/s00601-024-01973-7","url":null,"abstract":"<div>Using the folding procedure, we investigate the bound state of the (Omega )+(alpha ) system. Previous theoretical analyses have indicated the existence of a deeply bound ground state, which is attributed to the strong (Omega )-nucleon interaction. By employing well-established parameterizations of nucleon density within the alpha particle, we performed numerical calculations for the folding (Omega )-(alpha ) potential. Our results show that the (V_{Omega alpha }(r)) potential can be accurately fitted using a Woods-Saxon function, with a phenomenological parameter (R = 1.1A^{1/3} approx 1.74) fm ((A=4)) in the asymptotic region where (2< r < 3) fm. We provide a thorough description of the corresponding numerical procedure. Our evaluation of the binding energy of the (Omega )+(alpha ) system within the cluster model is consistent with both previous and recent reported findings. To further validate the folding procedure, we also calculated the (Xi )-(alpha ) folding potential based on a simulation of the ESC08c Y-N Nijmegen model. A comprehensive comparison between the (Xi )-(alpha ) folding and (Xi )-( alpha ) phenomenological potentials is presented and discussed.</div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"66 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142754225","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

An Experimental Platform for Studying the Heteronuclear Efimov Effect with an Ultracold Mixture of (^textbf{6})Li and (^textbf{133})Cs Atoms 用（^textbf{6}）Li 和（^textbf{133}）Cs 原子的超冷混合物研究异核艾菲莫夫效应的实验平台

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-11-29 DOI: 10.1007/s00601-024-01971-9

Eleonora Lippi, Manuel Gerken, Stephan Häfner, Marc Repp, Rico Pires, Michael Rautenberg, Tobias Krom, Eva D. Kuhnle, Binh Tran, Juris Ulmanis, Bing Zhu, Lauriane Chomaz, Matthias Weidemüller

{"title":"An Experimental Platform for Studying the Heteronuclear Efimov Effect with an Ultracold Mixture of (^textbf{6})Li and (^textbf{133})Cs Atoms","authors":"Eleonora Lippi, Manuel Gerken, Stephan Häfner, Marc Repp, Rico Pires, Michael Rautenberg, Tobias Krom, Eva D. Kuhnle, Binh Tran, Juris Ulmanis, Bing Zhu, Lauriane Chomaz, Matthias Weidemüller","doi":"10.1007/s00601-024-01971-9","DOIUrl":"10.1007/s00601-024-01971-9","url":null,"abstract":"<div>We present the experimental apparatus enabling the observation of the heteronuclear Efimov effect in an optically trapped ultracold mixture of (^6)Li-(^{133})Cs with high-resolution control of the interactions. A compact double-species Zeeman slower consisting of four interleaving helical coils allows for a fast-switching between two optimized configurations for either Li or Cs and provides an efficient sequential loading into their respective MOTs. By means of a bichromatic optical trapping scheme based on species-selective trapping we prepare mixtures down to 100 nK of ({1times 10^{4}}) Cs atoms and ({7times 10^{3}}) Li atoms. Highly stable magnetic fields allow high-resolution atom-loss spectroscopy and enable to resolve splitting in the loss feature of a few tens of milligauss. These features allowed for a detailed study of the Efimov effect.</div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"66 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00601-024-01971-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737153","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

The Steepest Slope toward a Quantum Few-Body Solution: Gradient Variational Methods for the Quantum Few-Body Problem 量子少体解的最陡坡：量子少体问题的梯度变量方法

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-11-19 DOI: 10.1007/s00601-024-01965-7

Paolo Recchia, Debabrota Basu, Mario Gattobigio, Christian Miniatura, Stéphane Bressan

{"title":"The Steepest Slope toward a Quantum Few-Body Solution: Gradient Variational Methods for the Quantum Few-Body Problem","authors":"Paolo Recchia, Debabrota Basu, Mario Gattobigio, Christian Miniatura, Stéphane Bressan","doi":"10.1007/s00601-024-01965-7","DOIUrl":"10.1007/s00601-024-01965-7","url":null,"abstract":"<div>Quantum few-body systems are deceptively simple. Indeed, with the notable exception of a few special cases, their associated Schrödinger equation cannot be solved analytically for more than two particles. One has to resort to approximation methods to tackle quantum few-body problems. In particular, variational methods have been proposed to ease numerical calculations and obtain precise solutions. One such method is the Stochastic Variational Method, which employs a stochastic search to determine the number and parameters of correlated Gaussian basis functions used to construct an ansatz of the wave function. Stochastic methods, however, face numerical and optimization challenges as the number of particles increases.We introduce a family of gradient variational methods that replace stochastic search with gradient optimization. We comparatively and empirically evaluate the performance of the baseline Stochastic Variational Method, several instances of the gradient variational method family, and some hybrid methods for selected few-body problems. We show that gradient and hybrid methods can be more efficient and effective than the Stochastic Variational Method. We discuss the role of singularities, oscillations, and gradient optimization strategies in the performance of the respective methods.</div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"65 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672391","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

Rainbow Gravity Effects on Relativistic Quantum Oscillator Field in a Topological Defect Cosmological Space-Time 拓扑缺陷宇宙时空中相对论量子振荡器场的彩虹引力效应

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-11-17 DOI: 10.1007/s00601-024-01966-6

Faizuddin Ahmed, Abdelmalek Bouzenada

{"title":"Rainbow Gravity Effects on Relativistic Quantum Oscillator Field in a Topological Defect Cosmological Space-Time","authors":"Faizuddin Ahmed, Abdelmalek Bouzenada","doi":"10.1007/s00601-024-01966-6","DOIUrl":"10.1007/s00601-024-01966-6","url":null,"abstract":"<div>In this paper, we investigate the quantum dynamics of scalar and oscillator fields in a topological defect space-time background under the influence of rainbow gravity’s. The rainbow gravity’s are introduced into the considered cosmological space-time geometry by replacing the temporal part (dt rightarrow frac{dt}{mathcal {F}(chi )}) and the spatial part (dx^i rightarrow frac{dx^i}{mathcal {H} (chi )}), where (mathcal {F}, mathcal {H}) are the rainbow functions and (0 le chi =|E|/E_p <1) is the dimensionless parameter. We derived the radial equation of the Klein–Gordon equation and its oscillator equation under rainbow gravity’s in topological space-time. To obtain eigenvalue of the quantum systems under investigations, we set the rainbow functions (mathcal {F}(chi )=1) and (mathcal {H}(chi )=sqrt{1-beta ,chi ^p}), where (p=1,2). We solve the radial equations through special functions using these rainbow functions and analyze the results. In fact, it is shown that the presence of cosmological constant, the topological defect parameter (alpha ), and the rainbow parameter (beta ) modified the energy spectrum of scalar and oscillator fields in comparison to the results obtained in flat space.\u0000</div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"65 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664434","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