61,336 research outputs found
About the creation of proton-anti-proton pair at electron-positron collider in the energy range of the mass
The process of electron--positron annihilation into proton--antiproton pair
is considered within the vicinity of resonance. The interference
between the pure electromagnetic intermediate state and the state
is evaluated. It is shown that this interference is destructive and the
relative phase between these two contributions is large ().Comment: 16 pages, 6 figures. The authors included the long-range
contributions (D-meson loop) in their calculations. The conclusion of the
papers did not chang
Diagrammatic Quantum Monte Carlo solution of the two-dimensional Cooperon-Fermion model
We investigate the two-dimensional cooperon-fermion model in the correlated
regime with a new continuous-time diagrammatic determinant quantum Monte Carlo
(DDQMC) algorithm. We estimate the transition temperature , examine the
effectively reduced band gap and cooperon mass, and find that delocalization of
the cooperons enhances the diamagnetism. When applied to diamagnetism of the
pseudogap phase in high- cuprates, we obtain results in a qualitative
agreement with recent torque magnetization measurements.Comment: 8 pages, 11 figure
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