منابع مشابه
Scalar quarkonia at finite temperature
Masses and decay constants of the scalar quarkonia, Q0ðQ 1⁄4 b; cÞ with quantum numbers IGðJPCÞ 1⁄4 0þð0þþÞ, are calculated in the framework of the QCD sum rules approach both in vacuum and finite temperature. The masses and decay constants remain unchanged up to T ’ 100 MeV but they start to diminish with increasing the temperature after this point. Near the critical or deconfinement temperatu...
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The present paper aims at investigating the manner of two dissipative massive scalar fields. Two massive scalar fields that interact with a reservoir were considered and a reservoir was modeled by continuum Klein-Gordon fields. The Lagrangian of the total system was canonically quantized and the dynamics of the system was determined using the Euler-Lagrange equation. Then, the explicit form of the...
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We compute the leading and next–to–leading corrections to the finite temperature scalar potential for a 3+1 dimensional φ4 theory using a systematic 1/N expansion. Our approach automatically avoids problems associated with infrared divergences in ordinary perturbation theory in h̄. The leading order result does not admit a first order phase transition. The subleading result shows that the exact ...
متن کاملFinite-temperature scalar field theory in static de Sitter space.
The finite-temperature one-loop effective potential for a scalar field in the static de Sitter space-time is obtained. Within this framework, by using zeta-function regularization, one can get, in the conformally invariant case, the explicit expression for the stress tensor anomaly. Its value turns out to depend on the thermal state of the system. This conclusion is different from the one deriv...
متن کاملSpectral Density of (Pseudo)Scalar Currents at Finite Temperature
We study the spectral densities of (pseudo)scalar currents at finite temperature in general case when mass of two quarks are different. Such spectral densities are necessary for the phenomenological investigation of hadronic parameters. We use quark propagator at finite temperature and show that an additional branch cut arises in spectral density, which corresponds to particle absorption from t...
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ژورنال
عنوان ژورنال: Il Nuovo Cimento A
سال: 1983
ISSN: 0369-3546,1826-9869
DOI: 10.1007/bf02902538