# Few-Body Systems (FEW-BODY SYST)

## 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.

## Current impact factor: 0.77

## Impact Factor Rankings

2016 Impact Factor | Available summer 2017 |
---|---|

2014 / 2015 Impact Factor | 0.768 |

2013 Impact Factor | 1.508 |

2012 Impact Factor | 1.047 |

2011 Impact Factor | 1.438 |

2010 Impact Factor | 0.622 |

2009 Impact Factor | 0.468 |

2008 Impact Factor | 1.014 |

2007 Impact Factor | 0.856 |

2006 Impact Factor | 0.765 |

2005 Impact Factor | 1.182 |

2004 Impact Factor | 1.948 |

2003 Impact Factor | 1.034 |

2002 Impact Factor | 1.773 |

2001 Impact Factor | 1.857 |

2000 Impact Factor | 1.552 |

1999 Impact Factor | 1.26 |

1998 Impact Factor | 1.359 |

1997 Impact Factor | 0.582 |

1996 Impact Factor | 1.82 |

1995 Impact Factor | 1.891 |

1994 Impact Factor | 1.377 |

1993 Impact Factor | 2.185 |

1992 Impact Factor | 1.02 |

## Impact factor over time

## Additional details

5-year impact | 0.79 |
---|---|

Cited half-life | 3.60 |

Immediacy index | 0.27 |

Eigenfactor | 0.00 |

Article influence | 0.27 |

Website | Few-Body Systems website |

Other titles | Few-body systems (Online), Acta physica Austriaca new series |

ISSN | 0177-7963 |

OCLC | 41983736 |

Material type | Document, Periodical, Internet resource |

Document type | 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

- Classificationgreen

## Publications in this journal

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**ABSTRACT:**A description of the RIBRAS (radioactive ion beams in Brasil) facility is presented and the last experimental developments in the system are reported. - [Show abstract] [Hide abstract]

**ABSTRACT:**The most frequently used methods to reduce fusion and total reaction excitation functions were investigated in a very recent paper Canto et al. (Phys Rev C 92:014626, 2015). These methods are widely used to eliminate the influence of masses and charges in comparisons of cross sections for weakly bound and tightly bound systems. This study reached two main conclusions. The first is that the fusion function method is the most successful procedure to reduce fusion cross sections. Applying this method to theoretical cross sections of single channel calculations, one obtains a system independent curve (the fusion function), that can be used as a benchmark to fusion data. The second conclusion was that none of the reduction methods available in the literature is able to provide a universal curve for total reaction cross sections. The reduced single channel cross sections keep a strong dependence of the atomic and mass numbers of the collision partners, except for systems in the same mass range. In the present work we pursue this problem further, applying the reduction methods to systems within a limited mass range. We show that, under these circumstances, the reduction of reaction data may be very useful. - [Show abstract] [Hide abstract]

**ABSTRACT:**Using the variational method we calculate mesonic wave function. We report masses and decay constants for heavy-light mesons. Leptonic decay widths of charmed and beauty mesons are also calculated. The obtained results are compared with the available experimental and theoretical data. - [Show abstract] [Hide abstract]

**ABSTRACT:**We consider the Schrödinger equation with a combination of Deng–Fan-type and harmonic terms. To solve the corresponding differential equation, we split the equation to two parts: the parent and the perturbation terms. We use the Nikiforov–Uvarov technique to solve the parent part. For the perturbation part, we apply the series expansion method. Next, using the calculated wave function, we investigate some bottom and charm mesons within the Isgur–Wise function formalism. We present especially semileptonic \({\bar{B} \rightarrow D\ell \bar{\nu}}\) and \({\bar{B}_{s} \rightarrow D_s \ell \bar{\nu }}\) decay widths, branching ratios and \({|V_{cb}|}\) (element of the CKM matrix). Masses of some pseudoscalar mesons are also indicated. Comparisons of our results with experimental values and other approaches are included. - [Show abstract] [Hide abstract]

**ABSTRACT:**The Green’s function associated with a Klein–Gordon particle moving in a D-dimensional space under the action of vector plus scalar q-deformed Hulthén potentials is constructed by path integration for \({q \geq 1}\) and \({\frac{1}{\alpha} \ln q < r < \infty}\). An appropriate approximation of the centrifugal potential term and the technique of space-time transformation are used to reduce the path integral for the generalized Hulthén potentials into a path integral for q-deformed Rosen–Morse potential. Explicit path integration leads to the radial Green’s function for any l state in closed form. The energy spectrum and the correctly normalized wave functions, for a state of orbital quantum number \({l \geq 0}\), are obtained. Eventually, the vector q-deformed Hulthén potential and the Coulomb potentials in D dimensions are considered as special cases. -
##### Article: Analytical Solution of Relativistic Few-Body Bound Systems with a Generalized Yukawa Potential

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**ABSTRACT:**We have investigated in this paper the few-body bound systems in a simple semi-relativistic scheme. For this aim, we introduced a spin independent relativistic description for a few-identical body system by presenting the analytical solution of few-particle Klein–Gordon equation. Performing calculations in D-dimensional configuration on the basis of the hypercentral approach, we reduced the few-body Klein–Gordon equation to a Schrödinger-like form. This equation is solved by using the Nikiforov–Uvarov method, through which the energy equations and eigenfunctions for a few-body bound system are obtained. We used the spin- and isospin-independent generalized Yukawa potential in our calculations, and the dependence of the few-body binding energies on the potential parameters has been investigated. - [Show abstract] [Hide abstract]

**ABSTRACT:**The scattering of identical nuclei at low energies exhibits conspicuous Mott oscillations which can be used to investigate the presence of components in the predominantly Coulomb interaction arising from several physical effects. It is found that at a certain critical value of the Sommerfeld parameter the Mott oscillations disappear and the cross section becomes quite flat. We call this effect Transverse Isotropy (TI). The critical value of the Sommerfeld parameter at which TI sets in is found to be $\eta_{c} = \sqrt{3s +2}$, where $s$ is the spin of the nuclei participating in the scattering. No TI is found in the Mott scattering of identical Fermionic nuclei. The critical center of mass energy corresponding to $\eta_c$ is found to be $E_c$ = 0.40 MeV for $\alpha + \alpha$ (s = 0) , 1.2 MeV for $^{6}$Li + $^{6}$LI (s = 1) and 7.1 MeV for $^{10}$B + $^{10}$B (s = 3). We further found that the inclusion of the nuclear interaction induces a significant modification in the TI. We suggest measurements at these sub-barrier energies for the purpose of extracting useful information about the nuclear interaction between light heavy ions. We also suggest extending the study of the TI to the scattering of identical atomic ions. - [Show abstract] [Hide abstract]

**ABSTRACT:**We consider spin and pseudospin symmetry limits of Dirac equation in the presence of scalar, vector and tensor generalized Cornell interaction and report the solutions via the quasi-exact analytical ansatz approach. - [Show abstract] [Hide abstract]

**ABSTRACT:**Our article is devoted to the study of the rare $B\to K^\ast \ell^+\ell^-$~decay where $\ell=e,\mu,\tau$. We compute the relevant form factors in the framework of the covariant quark model with infrared confinement in the full kinematical momentum transfer region. The calculated form factors are used to evaluate branching fractions and polarization observables in the cascade decay $B\to K^\ast(\to K\pi)\ell^+\ell^-$. We compare the obtained results with available experimental data and the results from other theoretical approaches. - [Show abstract] [Hide abstract]

**ABSTRACT:**We multiply the anisotropic Gaussian atomic orbital by a field-dependent gauge phase to describe the wave function for the hydrogen molecular ion in non-aligned magnetic fields. With the kind of basis set, the convergence of the total energy at the equilibrium distance for the 1u state is much improved compared to the same atomic orbital without the gauge phase. For 2.35 × 104 ≤ B ≤ 107 T, better total energies of the 1u state at the corresponding equilibrium are obtained for the deviations 15°–90° of the magnetic field relative to the molecular axis. The result also shows that, there is a transition of the equilibrium configuration from the vertical orientation to the parallel orientation with increasing field strength. - [Show abstract] [Hide abstract]

**ABSTRACT:**This paper studies numerically the photogravitational version of the restricted four-body problem, where an infinitesimal particle is moving under the gravitational attraction and radiation pressure of three bodies much bigger than the particle, the primaries. The fourth body does not affect the motion of the three bodies. These bodies are always at the vertices of an equilateral triangle (Lagrange configuration). We consider all the primary bodies (m 1, m 2, m 3) as radiation sources with radiation factors of the two bodies (m 2 and m 3) equal. In this paper we suppose the masses of the three primary bodies are equal. It is found that the involved parameters influenced the positions of the equilibrium points. The linear stability of the relative equilibrium solutions is also studied and all these points are unstable. - [Show abstract] [Hide abstract]

**ABSTRACT:**In high energy scattering experiments, the proton spin is understood as the sum of the spin and orbital angular momentum of the quarks and gluons in Feynman’s parton picture. The Jaffe–Manohar form of the proton spin sum rule is justified as physical, and it is shown that the individual terms can be related to the proton matrix elements of certain quasi-obervables through a large momentum effective field theory. The relation is expressed as a factorization formula where the leading contribution to the quasi-observable is factorized into the parton observables and perturbative matching coefficients, and we present the results for the latter at one-loop order in perturbation theory. This will provide us with the basis to extract the proton spin content from the lattice QCD calculations of the quasi-observables. - [Show abstract] [Hide abstract]

**ABSTRACT:**The ground-state properties of the two-flavored mixture of a few attractive fermions confined in a one-dimensional harmonic trap is studied. It is shown that for slightly imbalanced system the pairing between fermions of opposite spins has completely different features that in the balanced case. The fraction of correlated pairs is suppressed by the presence of additional particle and another uncorrelated two-body orbital dominates in the ground-state of the system. -

Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.