منابع مشابه
Pion - Nucleus Scattering and Systematics of the Delta - Nucleus Potential
A proper description of p ion-nuc leus scattering at energies near the (3,3) resonance requires that account be taken of the dynamics of the resonant p i o n n u cleon system. In particular the motion of this system through the nucleus and its strong interaction with the nuclear medium cannot be neglected [1,2]. Recently several groups [2 6] have incorporated these effects into calculations of ...
متن کاملS-Wave Quarkonia in Potential Models
For the last twenty years the melting of heavy quark bound states has been considered an unambiguous signal for deconfinement [1]. Understanding the modification of the properties of heavy quarkonia in a hot medium is therefore essential for understanding deconfinement. Phenomenological studies based on potential models have been recently accompanied by lattice QCD calculations. The temperature...
متن کاملPion Scattering Length from Two - Pion Wave Function ∗
We present a preliminary report on a calculation of scattering length for I = 2 S-wave two-pion system directly from the two-pion wave function. Results are compared with those calculated from the time dependence of twopion four-point functions. Calculations are made with an RG-improved action for gluons and improved Wilson action for quarks at a−1 = 1.207(12) GeV on 20 × 48 and 24 × 48 lattices.
متن کاملPion cloud contribution to K+-nucleus scattering.
A careful reanalysis is done of the contribution to K+ nucleus scattering from the interaction of the kaon with the virtual pion cloud. The usual approximations made in the evaluation of the related kaon selfenergy are shown to fail badly. We also find new interaction mechanisms which provide appreciable corrections to the kaon selfenergy. Some of these contribute to the imaginary part below pi...
متن کاملMicroscopic approach to pion-nucleus dynamics.
Elastic scattering of pions from finite nuclei is investigated utilizing a contemporary, momentum–space first–order optical potential combined with microscopic estimates of second–order corrections. The calculation of the first–order potential includes: (1) full Fermi–averaging integration including both the delta propagation and the intrinsic nonlocalities in the π-N amplitude, (2) fully covar...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2008
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.77.024602