Enhanced binding of an N-particle system interacting with a scalar field
II.Relativistic version [PDF]
Fumio Hiroshima, Itaru SasakiAn enhanced binding of $N$-{\it relativistic} particles coupled to a masslessView original: http://arxiv.org/abs/1202.2629
scalar bose field is investigated. It is not assumed that the system has a
ground state for the zero-coupling. It is shown, however, that there exists a
ground state for sufficiently large coupling. The proof is based on checking
the stability condition and showing a uniform exponential decay of infrared
regularized ground states.
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