15 papers
Positron attachment to the He doubly excited states
M. W. J. Bromley, J. Mitroy, K. Varga
The projection method is used to demonstrate the existence of positron attachment to three doubly excited states of helium. The e^+He(2s^2 1Se), e^+He(3s^2 1Se), and the e^+He(2s2p…
Benchmark Test Calculation of a Four-Nucleon Bound State
H. Kamada, A. Nogga, W. Gloeckle +15
In the past, several efficient methods have been developed to solve the Schroedinger equation for four-nucleon bound states accurately. These are the Faddeev-Yakubovsky, the couple…
New Lower Bound on Fermion Binding Energies
O. Juillet, S. Fleck, L. Theussl +2
We derive a new lower bound for the ground state energy of N fermions with total spin S in terms of binding energies of (N-1) fermions.…
Is there diquark clustering in the nucleon?
L. Ya. Glozman, K. Varga
It is shown that the instanton-induced interaction in qq pairs, iterated in t-channel, leads to a meson-exchange interactions between quarks. In this way one can achieve a simultan…
Signature of the existence of the positronium molecule
J. Usukura, K. Varga, Y. Suzuki
The positronium molecule (Ps) has not been experimentally observed yet because its tiny (4.5 eV) binding energy cannot be detected when the molecule annihilates by emitting two…
Second bound state of the positronium molecule and biexcitons
K. Varga, J. Usukura, Y. Suzuki
A new, hitherto unknown bound state of the positronium molecule, with orbital angular momentum L=1 and negative parity is reported. This state is stable against autodissociation ev…