# Few-Body Systems Journal Impact Factor & Information

Publisher: Springer Verlag

## Journal description

The journal is devoted to the publication of original research work both experimental and theoretical in the field of few-body systems. Conceptually such systems are understood as consisting of a small number of well-defined constituent structures. Investigations of the behaviour of these systems form the central subject matter of the journal. Systems for which an equivalent one-body description is available or can be designed and large systems for which specific many-body methods are needed are outside the scope of the journal. The focus of interest lies in the research methods properties and results characteristic of few-body systems. Particular examples of few-body systems are light nuclei light atoms small molecules but also celestial systems "elementary" particles (considered as systems of few constituents) or larger systems with a few-particle substructure. The principal aim of the journal is to bring together competent work from various fields of physics such as particle nuclear atomic molecular and condensed-matter physics and also from astrophysics astronomy mathematics and chemistry thereby fostering research done on related problems in different areas of natural sciences. While concentrating on few-body systems which can also be characterized as generally amenable to rigorous solutions the journal stresses interdisciplinarity through the exchange of ideas methods results experience and knowledge gathered in neighbouring fields. Beyond the publication of articles the journal as a forum for the community of scientists engaged in the study of few-body problems also provides for the rapid dissemination of actual scientific and practical information in separate News Sections; these include abstracts of recent preprints a calendar of conferences and meetings book reviews announcements etc. Though the emphasis is on regular research articles the journal publishes also papers in the form of letters rapid communications comments and from time to time reviews or progress reports.

## Impact Factor Rankings

2015 Impact Factor Available summer 2015 1.508 1.047 1.438 0.622 0.468 1.014 0.856 0.765 1.182 1.948 1.034 1.773 1.857 1.552 1.26 1.359 0.582 1.82 1.891 1.377 2.185 1.02

## Impact factor over time

Impact factor
.
Year

5-year impact 0.81 4.60 0.60 0.00 0.32 Few-Body Systems website Few-body systems (Online), Acta physica Austriaca new series 0177-7963 41983736 Document, Periodical, Internet resource Internet Resource, Computer File, Journal / Magazine / Newspaper

## Publisher details

• Pre-print
• Author can archive a pre-print version
• Post-print
• Author can archive a post-print version
• Conditions
• Author's pre-print on pre-print servers such as arXiv.org
• Author's post-print on author's personal website immediately
• Author's post-print on any open access repository after 12 months after publication
• Publisher's version/PDF cannot be used
• Published source must be acknowledged
• Must link to publisher version
• Set phrase to accompany link to published version (see policy)
• Articles in some journals can be made Open Access on payment of additional charge
• Classification
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## Publications in this journal

• ##### Article: Low-Energy Reactions Involving Halo Nuclei: A Microscopic Version of CDCC
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ABSTRACT: We extend the continuum discretized coupled channel method (CDCC) to a microscopic version, where the projectile is described by a microscopic cluster model. This generalization (MCDCC) only relies on nucleon-target interactions, and therefore presents an important predictive power. We briefly present an outline of the model, and provide recent examples with 7Li and 8B elastic scattering on different light and heavy targets. We show that the model can be applied to high energies, as well as to low energies.
Few-Body Systems 03/2015; DOI:10.1007/s00601-015-0970-3
• ##### Article: Thermodynamic Properties of the Three-Dimensional Dirac Oscillator with Aharonov–Bohm Field and Magnetic Monopole Potential
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ABSTRACT: In this paper, we have studied the Dirac equation in 3+1 dimensions with non-minimal coupling to isotropic radial linear potential in the presence of static electromagnetic potential. The Problem is investigated with Aharonov-Bohm and magnetic monopole fields, and the thermodynamic properties of the system are calculated.
Few-Body Systems 03/2015; 56(2-3). DOI:10.1007/s00601-015-0944-5
• ##### Article: Static and Restricted Rigid Rotor Configurations of Three Classical 12-6-Lennard-Jones Particles
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ABSTRACT: Motivated by the continuous search for stable geometric configurations of atom and molecule clusters, we analyse the planar evolution of two freely movable point particles around a third immovable one subject to the 12-6-Lennard-Jones potential. This tailors our discussion to systems with one very heavy particle that can be assumed to be permanently at rest in the moving reference frame for the whole ensemble. Relating to Lennard-Jones interactions, we allow all three point particles to take different parameters. This breaks the symmetry conditions that are usually imposed on such systems. Through a classical non-regularized Hamiltonian description of our restricted three particle system, we study the existence of genuine equilibria and rigid rotor solutions around a single axis of rotation. We prove, depending on the choice of the Lennard-Jones parameters, that for these genuine equilibria, collinear alignments and triangular configurations of any shape can occur. Moreover, for the discussed type of relative equilibria a complete classification is provided by proving the existence of rigid rotor configurations in the plane of rotation (collinear cis and trans as well as triangle shaped configurations) and out of the plane of rotation (triangle shaped and flag-like configurations). Furthermore, we show that there are no further rigid rotor solutions of the underlying equations of motion.
Few-Body Systems 03/2015; 56(2-3). DOI:10.1007/s00601-015-0958-z
• Source
##### Article: Non-perturbative Calculation of the Positronium Mass Spectrum in Basis Light-Front Quantization
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ABSTRACT: We report on recent improvements to our non-perturbative calculation of the positronium spectrum. Our Hamiltonian is a two-body effective interaction which incorporates one-photon exchange terms, but neglects fermion self-energy effects. This effective Hamiltonian is diagonalized numerically in a harmonic oscillator basis at strong coupling ($\alpha=0.3$) to obtain the mass eigenvalues. We find that the mass spectrum compares favorably to the Bohr spectrum of non-relativistic quantum mechanics evaluated at this unphysical coupling.
Few-Body Systems 02/2015; DOI:10.1007/s00601-015-0962-3
• ##### Article: Dispersion Representation of Deeply Virtual Compton Scattering
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ABSTRACT: We discuss the dispersive representation of the D-term form factor for hard exclusive reactions, using unsubtracted t-channel dispersion relations. This representation provides a microscopical interpretation of the physical content of the D-term form factor in terms of t-channel exchanges with the appropriate quantum numbers. The contribution from two-pion intermediate states is explicitly evaluated, and the corresponding results for the D-term form factor as function of t as well as at t = 0 are discussed in comparison with available model predictions and phenomenological parametrizations.
Few-Body Systems 01/2015; DOI:10.1007/s00601-015-0954-3
• ##### Article: Particles of Spin Zero and 1/2 in Electromagnetic Field with Confining Scalar Potential in Modified Heisenberg Algebra
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ABSTRACT: In this paper, we propose to solve the relativistic Klein Gordon and Dirac equations subjected to the action of a uniform electomagnetic field confining scalar potential yin the presence of a minimal length in the momentum space. In both cases, the energy eigenvalues and their corresponding eigenfunctions are obtained. The limiting cases is then deduced for a small parameter of deformation.
Few-Body Systems 01/2015; DOI:10.1007/s00601-015-0956-1
• ##### Article: Confinement and Chiral-Symmetry Breaking in the Covariant Spectator Theory
Few-Body Systems 01/2015; DOI:10.1007/s00601-015-0955-2
• ##### Article: Bjorken-x Dependence of Hadronic Structure from Lattice QCD
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ABSTRACT: I present a first direct lattice-QCD calculation of the Bjorken-x dependence of hadron structure functions. By taking a hadron with a large momentum boost, we are able to connect light-cone quantities to lattice-QCD nonlocal but time-independent matrix elements. Since the largest attainable momentum is limited, we correct for the sizable leading momentum dependence systematically. In this talk, I present an exploratory study of the nucleon quark density, helicity and transversity distributions.
Few-Body Systems 01/2015; DOI:10.1007/s00601-015-0948-1
• ##### Article: Proton Spin Sum Rule from Large Momentum Effective Field Theory
Few-Body Systems 01/2015; DOI:10.1007/s00601-014-0939-7
• ##### Article: Jefferson Lab Science: Present and Future
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ABSTRACT: The continuous electron beam accelerator facility and associated experimental equipment at Jefferson Lab comprise a unique facility for experimental nuclear physics. This facility is presently being upgraded, which will enable a new experimental program with substantial discovery potential to address important topics in nuclear, hadronic, and electroweak physics. Further in the future, it is envisioned that the Laboratory will evolve into an electron-ion colliding beam facility.
Few-Body Systems 01/2015; DOI:10.1007/s00601-015-0946-3
• ##### Article: Extraction of Compton Form Factors in Scalar QED
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ABSTRACT: When deeply virtual Compton scattering is used as a tool to study the structure of hadrons in an exclusive process, one way to analyze this process is to express the amplitudes in terms of generalized parton distributions (GPDs). The definition of the latter quantities requires a special kinematics, that cannot always be realized in experiments. Therefore, one may use the expression of the scattering amplitudes in terms of the invariant Compton form factors (CFFs) as a stepping stone to finding the GPDs. In a simple case we illustrate the influences of making approximations in the extraction of CFFs on the values obtained.
Few-Body Systems 01/2015; DOI:10.1007/s00601-014-0943-y
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##### Article: Application of Coherent State Approach for the Cancellation of Infrared Divergences to All Orders in LFQED
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ABSTRACT: We sketch an all order proof of cancellation of infrared (IR) divergences in light front quantum electrodynamics using a coherent state formalism. In this talk, it has been shown that the true IR divergences in fermion self energy are eliminated to all orders in a light-front time-ordered perturbative calculation if one uses coherent state basis instead of the usual Fock basis to calculate the Hamiltonian matrix elements.
Few-Body Systems 12/2014; DOI:10.1007/s00601-014-0932-1
• ##### Article: Quadratic Algebra Approach to the Dirac Equation with Spin and Pseudospin Symmetry for the 4D Harmonic Oscillator and U(1) Monopole
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ABSTRACT: In this paper, we study the Dirac equation with spin and pseudospin symmetry by the quadratic algebra approach for the 4-dimensional harmonic oscillator. By realization of the quadratic algebras in the deformed oscillator algebra, we obtain the relativistic energy spectrum. Also, by regarding the generalized Kustaanheimo–Stiefel transformation, we obtain the relativistic energy spectrum for the charge-dyon system with the U(1) monopole.
Few-Body Systems 12/2014; 56(1). DOI:10.1007/s00601-014-0931-2
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##### Article: A Light-Front approach to the $^3$He spectral function
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ABSTRACT: The analysis of semi-inclusive deep inelastic electron scattering off polarized $^3$He at finite momentum transfers, aimed at the extraction of the quark transverse-momentum distributions in the neutron, requires the use of a distorted spin-dependent spectral function for $^3$He, which takes care of the final state interaction effects. This quantity is introduced in the non-relativistic case, and its generalization in a Poincar\'e covariant framework, in plane wave impulse approximation for the moment being, is outlined. Studying the light-front spin-dependent spectral function for a J=1/2 system, such as the nucleon, it is found that, within the light-front dynamics with a fixed number of constituents and in the valence approximation, only three of the six leading twist T-even transverse-momentum distributions are independent.
Few-Body Systems 11/2014; DOI:10.1007/s00601-014-0935-y