发布求助
文献互助 智能选刊 最新文献

Few-Body Systems最新文献

筛选
英文 中文
Measurement of the (mathrm {{}^{12}C}(e,e')) Cross Sections at (Q^2=0.8,textrm{GeV}^2/c^2) 在 $$Q^2=0.8,textrm{GeV}^2/c^2$ 时测量 $$mathrm {{}^{12}C}(e,e')$$ 交叉截面
IF 1.7 4区 物理与天体物理
Few-Body Systems Pub Date : 2024-08-01 DOI: 10.1007/s00601-024-01944-y
M. Mihovilovič, L. Doria, P. Achenbach, A. M. Ankowski, S. Bacca, D. Bosnar, A. Denig, M. O. Distler, A. Esser, I. Friščić, C. Giusti, M. Hoek, S. Kegel, M. Littich, G. D. Megias, H. Merkel, U. Müller, J. Pochodzalla, B. S. Schlimme, M. Schoth, C. Sfienti, S. Širca, J. E. Sobczyk, Y. Stöttinger, M. Thiel
{"title":"Measurement of the (mathrm {{}^{12}C}(e,e')) Cross Sections at (Q^2=0.8,textrm{GeV}^2/c^2)","authors":"M. Mihovilovič,&nbsp;L. Doria,&nbsp;P. Achenbach,&nbsp;A. M. Ankowski,&nbsp;S. Bacca,&nbsp;D. Bosnar,&nbsp;A. Denig,&nbsp;M. O. Distler,&nbsp;A. Esser,&nbsp;I. Friščić,&nbsp;C. Giusti,&nbsp;M. Hoek,&nbsp;S. Kegel,&nbsp;M. Littich,&nbsp;G. D. Megias,&nbsp;H. Merkel,&nbsp;U. Müller,&nbsp;J. Pochodzalla,&nbsp;B. S. Schlimme,&nbsp;M. Schoth,&nbsp;C. Sfienti,&nbsp;S. Širca,&nbsp;J. E. Sobczyk,&nbsp;Y. Stöttinger,&nbsp;M. Thiel","doi":"10.1007/s00601-024-01944-y","DOIUrl":"10.1007/s00601-024-01944-y","url":null,"abstract":"<div><p>We present the findings of a study based on a new inelastic electron-scattering experiment on the <span>({}^{12})</span>C nucleus focusing on the kinematic region of <span>(Q^2=0.8,textrm{GeV}^2/{c}^2)</span>. The measured cross section is sensitive to the transverse response function and provides a stringent test of theoretical models, as well as of the theoretical assumptions made in Monte-Carlo event-generator codes developed for the interpretation of neutrino-nucleus experiments, such as DUNE and HyperK. We find that modern generators such as GENIE and GiBUU reproduce our new experimental data within 10<span>(%)</span>.</p></div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00601-024-01944-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141885734","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
Reliability of the Born-Oppenheimer Approximation in Noninteger Dimensions 非整数维度中的玻恩-奥本海默近似的可靠性
IF 1.7 4区 物理与天体物理
Few-Body Systems Pub Date : 2024-07-24 DOI: 10.1007/s00601-024-01946-w
D. S. Rosa, T. Frederico, R. M. Francisco, G. Krein, M. T. Yamashita
{"title":"Reliability of the Born-Oppenheimer Approximation in Noninteger Dimensions","authors":"D. S. Rosa,&nbsp;T. Frederico,&nbsp;R. M. Francisco,&nbsp;G. Krein,&nbsp;M. T. Yamashita","doi":"10.1007/s00601-024-01946-w","DOIUrl":"10.1007/s00601-024-01946-w","url":null,"abstract":"<div><p>We address the question of the reliability of the Born-Oppenheimer (BO) approximation for a mass-imbalanced resonant three-body system embedded in noninteger dimensions. We address this question within the problem of a system of currently experimental interest, namely <span>(^7)</span>Li<span>(-^{87})</span>Rb<span>(_2)</span>. We compare the Efimov scale parameter as well as the wave functions obtained using the BO approximation with those obtained using the Bethe-Peierls boundary condition.</p></div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141770284","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
On the Lorentz Symmetry Violation Effects on a Particle Subject to a Trigonometric Potential and a Periodic Potential 论受三角势和周期势作用的粒子的洛伦兹对称性违反效应
IF 1.7 4区 物理与天体物理
Few-Body Systems Pub Date : 2024-07-23 DOI: 10.1007/s00601-024-01947-9
K. Bakke, H. Belich
{"title":"On the Lorentz Symmetry Violation Effects on a Particle Subject to a Trigonometric Potential and a Periodic Potential","authors":"K. Bakke,&nbsp;H. Belich","doi":"10.1007/s00601-024-01947-9","DOIUrl":"10.1007/s00601-024-01947-9","url":null,"abstract":"<div><p>We study the nonrelativistic effects of the Lorentz symmetry violation determined by the coupling between the fixed vector field <span>(f^{mu }gamma ^{5})</span> and the derivative of the fermionic field on the squared cotangent potential and a periodic potential in <span>(left( 1+1right) )</span>-dimensions. Our analysis focusses on how the energy eigenvalues can be influenced by the Lorentz symmetry violation background. From the energy eigenvalues, we extend our discussion to the revival time.</p></div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141770285","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
Explicitly Correlated Gaussians with Tensor Pre-factors: Analytic Matrix Elements 具有张量预因子的显相关高斯：解析矩阵元素
IF 1.7 4区 物理与天体物理
Few-Body Systems Pub Date : 2024-07-17 DOI: 10.1007/s00601-024-01945-x
D. V. Fedorov, A. F. Teilmann, M. C. Østerlund, T. L. Norrbohm
{"title":"Explicitly Correlated Gaussians with Tensor Pre-factors: Analytic Matrix Elements","authors":"D. V. Fedorov,&nbsp;A. F. Teilmann,&nbsp;M. C. Østerlund,&nbsp;T. L. Norrbohm","doi":"10.1007/s00601-024-01945-x","DOIUrl":"10.1007/s00601-024-01945-x","url":null,"abstract":"<div><p>We consider a specific form of explicitly correlated Gaussians—with tensor pre-factors—which appear naturally when dealing with certain few-body systems in nuclear and particle physics. We derive analytic matrix elements with these Gaussians—overlap, kinetic energy, and Coulomb potential—to be used in variational calculations of those systems. We also perform a quick test of the derived formulae by applying them to p- and d-waves of the hydrogen atom.</p></div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00601-024-01945-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745409","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
Study of the Alpha-particle Monopole Transition form Factor 阿尔法粒子单极转换形式因子研究
IF 1.7 4区 物理与天体物理
Few-Body Systems Pub Date : 2024-07-15 DOI: 10.1007/s00601-024-01940-2
M. Viviani, A. Kievsky, L. E. Marcucci, L. Girlanda
{"title":"Study of the Alpha-particle Monopole Transition form Factor","authors":"M. Viviani,&nbsp;A. Kievsky,&nbsp;L. E. Marcucci,&nbsp;L. Girlanda","doi":"10.1007/s00601-024-01940-2","DOIUrl":"10.1007/s00601-024-01940-2","url":null,"abstract":"<div><p>The <span>({{}^4textrm{He}})</span> monopole form factor is studied by computing the transition matrix element of the electromagnetic charge operator between the <span>({{}^4textrm{He}})</span> ground-state and the <span>(p+{{}^3textrm{H}})</span> and <span>(n+{{}^3textrm{He}})</span> scattering states. The nuclear wave functions are calculated using the hyperspherical harmonic method, by starting from Hamiltonians including two- and three-body forces derived in chiral effective field theory. The electromagnetic charge operator retains, beyond the leading order (impulse approximation) term, also higher order contributions, as relativistic corrections and meson-exchange currents. The results for the monopole form factor are in fair agreement with recent MAMI data. Comparison with other theoretical calculations are also provided.</p></div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141717780","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
Beyond of the Hyperspherical Quantum Mechanic 超越超球量子力学
IF 1.7 4区 物理与天体物理
Few-Body Systems Pub Date : 2024-07-08 DOI: 10.1007/s00601-024-01939-9
Michel Fabre de la Ripelle
{"title":"Beyond of the Hyperspherical Quantum Mechanic","authors":"Michel Fabre de la Ripelle","doi":"10.1007/s00601-024-01939-9","DOIUrl":"10.1007/s00601-024-01939-9","url":null,"abstract":"<div><p>The aim of this work is to explain how, starting from the orthogonality expression of two polynomials, we deduce the Schrödinger equation and the solution of the N-body problem including two-body correlations as well as the existence of shells. Generated by the behaviour of kinetic energy for a two-body interaction. The quantification of matters is obtained by the application of the weight function algorithm to the statement that two states are independents when their product integrated over the whole space is null leading to a two variables second order differential equation. The Nuclear Shell Model is a consequence of the kinetic energy behaviour for increasing number of nucleons in ground state. It leaves the mean field theory useless.</p></div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141576952","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
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,&nbsp;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":null,"pages":null},"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
{"title":"Resonances in the Quark Model","authors":"Jean-Marc Richard,&nbsp;Alfredo Valcarce,&nbsp;Javier Vijande","doi":"10.1007/s00601-024-01941-1","DOIUrl":"10.1007/s00601-024-01941-1","url":null,"abstract":"<div><p>A discussion is presented of the estimates of the energy and width of resonances in constituent models, with focus on the tetraquark states containing heavy quarks.\u0000</p></div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141521361","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 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":null,"pages":null},"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
{"title":"Low-Energy Theorems for Neutron–Proton Scattering in (chi )EFT Using a Perturbative Power Counting","authors":"Oliver Thim","doi":"10.1007/s00601-024-01938-w","DOIUrl":"10.1007/s00601-024-01938-w","url":null,"abstract":"<div><p>Low-energy theorems (LETs) for effective-range parameters in nucleon-nucleon scattering encode properties of the long-range part of the nuclear force. We compute LETs for <i>S</i>-wave neutron–proton scattering using chiral effective field theory with a modified version of Weinberg power counting. Corrections to the leading order amplitude are included in distorted-wave perturbation theory and we incorporate contributions up to the third order in the power counting. We find that LETs in the <span>(^1S_0)</span> and <span>(^3S_1)</span> partial waves agree well with empirical effective-range parameters. At the same time, phase shifts up to laboratory scattering energies of about 100 MeV can be reproduced. We show that it is important to consider the pion mass splitting in the one-pion exchange potential in the <span>(^1S_0)</span> partial wave while the effect is negligible in the <span>(^3S_1)</span> partial wave. We conclude that pion exchanges, as treated in this power counting, accurately describe the long-range part of the <i>S</i>-wave nuclear interaction.\u0000</p></div>","PeriodicalId":556,"journal":{"name":"Few-Body Systems","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00601-024-01938-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529708","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信