The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform
Shina Tan - One of the best experts on this subject based on the ideXlab platform.
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generalized virial theorem and pressure relation for a strongly correlated fermi gas
Annals of Physics, 2008Co-Authors: Shina TanAbstract:Abstract For a two-component Fermi gas in the unitarity limit (i.e., with infinite scattering length), there is a well-known virial theorem, first shown by J.E. Thomas et al. A few people rederived this result, and extended it to Few-Body Systems, but their results are all restricted to the unitarity limit. Here I show that there is a generalized virial theorem for FINITE scattering lengths. I also generalize an exact result concerning the pressure to the case of imbalanced populations.
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generalized virial theorem and pressure relation for a strongly correlated fermi gas
arXiv: Statistical Mechanics, 2008Co-Authors: Shina TanAbstract:For a two-component Fermi gas in the unitarity limit (ie, with infinite scattering length), there is a well-known virial theorem, first shown by J. E. Thomas et al, Phys. Rev. Lett. 95, 120402 (2005). A few people rederived this result, and extended it to Few-Body Systems, but their results are all restricted to the unitarity limit. Here I show that there is a generalized virial theorem for FINITE scattering lengths. I also generalize an exact result concerning the pressure, first shown in cond-mat/0508320, to the case of imbalanced populations.
J.m. Laget - One of the best experts on this subject based on the ideXlab platform.
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Rescattering in meson photoproduction from few body Systems
Physical Review C, 2006Co-Authors: J.m. LagetAbstract:Exclusive reactions induced at high momentum transfer in few body Systems provide us with an original way to study the production and propagation of hadrons in cold nuclear matter. In very well-defined parts of the phase space, the reaction amplitude develops a logarithmic singularity. It is on solid ground since it depends on only on-shell elementary amplitudes and on low momentum components of the nuclear wave function. This is the best window for studying the propagation of exotic configurations of hadrons such as the onset of color transparency. It may appear earlier in meson-photoproduction reactions, more particularly in the strange sector, than in the more classical quasi-elastic scattering of electrons. More generally, those reactions provide us with the best tool to determine the cross section of the scattering of various hadrons (strange particles, vector mesons) from the nucleon and to obtain the production of possible exotic states.
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The electro-disintegration of few body Systems revisited
Physics Letters B, 2005Co-Authors: J.m. LagetAbstract:AbstractRecent studies of the electro-disintegration of the few body Systems at JLab have revived the field. Not only recoil momentum distributions have been determined in a single shot. But also they confirm that the diagrammatic approach, which I developed 25 years ago, is relevant to analyze them, provided that the nucleon–nucleon scattering amplitude, determined in the same energy range, is used. They provide us with a solid starting point to address the issue of the propagation of exotic components of hadrons in nuclear matter
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Photo and Electrodisintegration of Few-Body Systems Revisited
Nuclear Dynamics: From Quarks to Nuclei, 2003Co-Authors: J.m. LagetAbstract:Twenty years after P. Sauer released the state of the art Faddeev solution of the bound state three nucleon Systems, I revisit photo and electrodisengration of few body Systems with a special emphasis on the prospects opened at Jefferson Laboratory.
J. F. J. Van Den Brand - One of the best experts on this subject based on the ideXlab platform.
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Recent results on spin dependent scattering from few body Systems obtained in Amsterdam
AIP Conference Proceedings, 2000Co-Authors: J. F. J. Van Den BrandAbstract:We report on aspects of the physics program with polarized electrons and polarized Few-Body Systems in Amsterdam. Specifically, we focus on the first measurement of spin-correlation parameters in quasifree electron scattering from vector-polarized deuterium. Polarized electrons were injected into the AmPS electron storage ring at a beam energy of 720 MeV. A Siberian snake was employed to preserve longitudinal polarization at the interaction point. Vector-polarized deuterium was produced by an atomic beam source and injected into an open-ended cylindrical cell, internal to the electron storage ring. Spin correlation parameters were measured for the (e,e′p) and (e,e′n) reactions at a four-momentum transfer squared of 0.21 (GeV/c)2. The (e,e′p) data give detailed information about the spin structure of the deuteron, and are in fair agreement with the results of microscopic calculations that include various spin-dependent reaction mechanism effects. The (e,e′n) data provide new information on the charge form ...
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Spin-dependent electromagnetic response of Few-Body Systems
Nuclear Physics A, 1998Co-Authors: M. Ferro-luzzi, J. F. J. Van Den Brand, Ricardo Alarcon, Th. S. Bauer, D. Boersma, T. Botto, M.c. Bouwhuis, H. J. Bulten, L.d. Van Buuren, R. EntAbstract:We report on the experimental program with polarized electrons and polarized Few-Body Systems at the internal target facility of the NIKHEF electron storage ring. With a polarized deuterium internal target, absolute measurements of unprecedented accuracy have been performed for the analyzing powers T20 and T22 in elastic electron-deuteron scattering at transferred four-momenta 1.1 < Q < 2.8 fm−1. Results for a first measurement of the tensor analyzing power in quasi-elastic scattering are also presented. These data provide new constraints for descriptions of the deuteron spin structure and for reaction mechanism effects. Quasi-elastic electron scattering from polarized 3He may provide precise information on the S′ and the D-wave parts of the 3He ground-state wave function, the neutron form factors, and the role of spin-dependent reaction mechanism effects. We have started an experimental program at NIKHEF where polarized 3He and polarized electrons are used, in combination with large acceptance electron and hadron detectors. Data were taken for the transverse (Ay0) and longitudinal (A′z) asymmetries at Q ⋍ 2 fm−1. We outline the performance of the target and detectors.
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Few-Body Systems Probed in Several Ways
Few-Body Problems in Physics ’95, 1995Co-Authors: J. F. J. Van Den BrandAbstract:New developments in nuclear Few-Body Systems are discussed. Results will be reported for the nucleon using virtual-compton scattering as a probe. For the deuteron, the high Q 2 (up to 6.8 (GeV/c)2) data from SLAG will be discussed, while also new data for the (e, e′p) reaction using tensor polarized deuterium from NIKHEF will be presented. Finally, the results from quasi-free knockout experiments using polarized protons incident on polarized 3He performed at IUCF will be shown. Plans for similar experiments in electronuclear physics will be outlined.
W. Kang - One of the best experts on this subject based on the ideXlab platform.
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Thermodynamic second law in irreversible processes of chaotic Few-Body Systems.
Physical review. E Statistical nonlinear and soft matter physics, 2001Co-Authors: G. Hu, Z. Zheng, L Yang, W. KangAbstract:Irreversible processes of few hard-ball (N) mechanical Systems are investigated numerically and compared with the theoretical results of quasistatic processes. The thermodynamic second law is valid for N>or=2 for both equilibrium and nonequilibrium Systems if the average ensemble of the large number of identical Systems is taken.
G. Hu - One of the best experts on this subject based on the ideXlab platform.
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Thermodynamic second law in irreversible processes of chaotic Few-Body Systems.
Physical review. E Statistical nonlinear and soft matter physics, 2001Co-Authors: G. Hu, Z. Zheng, L Yang, W. KangAbstract:Irreversible processes of few hard-ball (N) mechanical Systems are investigated numerically and compared with the theoretical results of quasistatic processes. The thermodynamic second law is valid for N>or=2 for both equilibrium and nonequilibrium Systems if the average ensemble of the large number of identical Systems is taken.
