Few-Body Systems最新文献_第4页

Effect of Background Scattering on Efimov Scenario for Overlapping Narrow Feshbach Resonances 背景散射对重叠窄费什巴赫共振的埃菲莫夫方案的影响

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-07-08 DOI: 10.1007/s00601-024-01943-z

Fatema Hamodi-Gzal, Lev Khaykovich

{"title":"Effect of Background Scattering on Efimov Scenario for Overlapping Narrow Feshbach Resonances","authors":"Fatema Hamodi-Gzal, Lev Khaykovich","doi":"10.1007/s00601-024-01943-z","DOIUrl":"10.1007/s00601-024-01943-z","url":null,"abstract":"<div><p>Efimov physics in the vicinity of two overlapping narrow Feshbach resonances can be explored within a framework of a three-channel model where a non-interacting open channel is coupled to two closed molecular channels. Here, we determine how it compares to the extended two-channel model, which includes an open channel with finite background scattering and a single molecular channel. We identify the parameter range in which the three-channel model surpasses the extended two-channel model. Furthermore, the three-channel model is extended to include background scattering, and then both models are applied to the experimentally relevant system of bosonic lithium atoms polarized on two different energy levels, with an isolated and two overlapping narrow Feshbach resonances, respectively. We confirm, in agreement with previous studies, that being small, the background scattering length in lithium has a negligible effect on the Efimov features in the case of isolated resonance. However, in the case of overlapping Feshbach resonances, the inclusion of background scattering improves the performance of the theory with respect to the experimentally measured position of the Efimov resonance.\u0000</p></div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"65 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00601-024-01943-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141576953","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

Resonances in the Quark Model 夸克模型中的共振

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-07-02 DOI: 10.1007/s00601-024-01941-1

Jean-Marc Richard, Alfredo Valcarce, Javier Vijande

引用次数: 0

The Role of the Effective Range in Strongly-Interacting Few-Body Systems 强相互作用少体系统中有效范围的作用

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-07-02 DOI: 10.1007/s00601-024-01942-0

Lucas Madeira

{"title":"The Role of the Effective Range in Strongly-Interacting Few-Body Systems","authors":"Lucas Madeira","doi":"10.1007/s00601-024-01942-0","DOIUrl":"10.1007/s00601-024-01942-0","url":null,"abstract":"<div><p>Strongly interacting systems appear in several areas of physics and are characterized by attractive interactions that can almost, or just barely, loosely bind two particles. Although this definition is made at the two-body level, this gives rise to fascinating effects in larger systems, including the so-called Efimov physics. In this context, the zero-range theory aims to describe low-energy properties based only on the scattering length. However, for a broad range of physical applications, the finite range of the interactions plays an important role. In this work, I discuss some aspects of finite-range effects in strongly interacting systems. I present the zero-range and shapeless universalities in two-body systems with applications in atomic and nuclear physics. I derived an analytical expression for the <i>s</i>-wave bound-state spectrum of the modified Pöschl–Teller potential for two particles in three dimensions, which is compared with the approximations to illustrate their usefulness. Concerning three identical bosons, I presented a trimer energy scaling function that explicitly includes the effective range. The implications for larger systems are briefly discussed.</p></div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"65 3","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141508596","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

Low-Energy Theorems for Neutron–Proton Scattering in (chi )EFT Using a Perturbative Power Counting 使用惯性功率计数的 $$chi $$ EFT 中中子-质子散射低能定理

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-06-25 DOI: 10.1007/s00601-024-01938-w

Oliver Thim

引用次数: 0

Three-Body Calculation Of Deuteron–Nucleus Scattering Using Microscopic Global Optical Potential 利用微观全局光学势能进行氘核散射的三体计算

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-06-18 DOI: 10.1007/s00601-024-01937-x

A. Deltuva, D. Jurčiukonis, D. Likandrovas, J. Torres Fernandez

引用次数: 0

Algebraic Approach to the Nuclear Few-Body Systems 核微小体系统的代数方法

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-06-07 DOI: 10.1007/s00601-024-01936-y

Augustinas Stepšys, Saulius Mickevičius, Darius Germanas, Ramutis Kazys Kalinauskas

引用次数: 0

Resonant States in Few-Body Systems: An Introduction to the Special Issue 少体系统中的共振态：特刊简介

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-06-06 DOI: 10.1007/s00601-024-01934-0

Rimantas Lazauskas, Alejandro Kievsky

引用次数: 0

Uncertainty Estimation and Anomaly Detection in Chiral Effective Field Theory Studies of Key Nuclear Electroweak Processes 关键核电弱过程的手性有效场理论研究中的不确定性估计和异常检测

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-06-04 DOI: 10.1007/s00601-024-01929-x

Bijaya Acharya

引用次数: 0

Doubly Excited States of Beryllium-Like Ions ((Z = 4)–10) in Dense Quantum Plasmas 致密量子等离子体中类铍离子（$$Z = 4$$ -10）的双激发态

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-06-03 DOI: 10.1007/s00601-024-01935-z

Nirvik Masanta, Arijit Ghoshal, Yew Kam Ho

{"title":"Doubly Excited States of Beryllium-Like Ions ((Z = 4)–10) in Dense Quantum Plasmas","authors":"Nirvik Masanta, Arijit Ghoshal, Yew Kam Ho","doi":"10.1007/s00601-024-01935-z","DOIUrl":"10.1007/s00601-024-01935-z","url":null,"abstract":"<div><p>The doubly excited states (DES) of beryllium-like ions (BLI) embedded in dense quantum plasma (QP) have been investigated by applying the stabilization method. Ions having atomic number <i>Z</i> lying between 4 to 10 are considered and treated as an effective three-body system by means of the ‘method of model potential’. Exponential cosine screened Coulomb potential is used to describe the screened interactions among the charged particles in QP. Using an extensive wavefunction, it has been possible to detect the existence of one, four and five DESs lying above the <span>(1s^22p)</span> threshold in the ions having <span>(Z = 4)</span>, <span>(Z = 5)</span> and <span>(Z = 6)</span>–10 respectively. The energies and widths of these states for the plasma-free case agree nicely with the reliable results available in the literature. A detailed study has been made to explore the changes in the energies and widths of these states subject to the varying screening effect of the background quantum plasma environment. Furthermore, <i>Z</i>-dependence of the changes induced by the plasma has also been investigated in detail.</p></div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":"65 2","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141254251","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 Impact of Quark Many-Body Effects on Exotic Hadrons 夸克多体效应对外来中子的影响

IF 1.7 4区物理与天体物理

Few-Body Systems Pub Date : 2024-05-26 DOI: 10.1007/s00601-024-01932-2

Sachiko Takeuchi, Makoto Takizawa, Yasuhiro Yamaguchi, Atsushi Hosaka

引用次数: 0