Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-07-10
Acta Phys.Hung. 8 (1998) 307-321; Heavy Ion Phys. 8 (1998) 307-321
Physics
High Energy Physics
High Energy Physics - Phenomenology
To appear in the "Gribov Memorial Volume" Heavy Ion Physics. Acta Physica Hungarica New Series. Discussion on quark masses fro
Scientific paper
In the near future, the DIRAC collaboration will measure pion-pion scattering lengths with great precision. Those measurements are likely to shed some light on the problem of the size of the chiral quark-antiquark condensate. Although it is usually assumed to be as a large as (-225 MeV)^3, in the last years a more general approach, has been developed to accommodate either a large or a small alternative (-100 MeV)^3. Such a low value would also modify the standard temperature estimate at which the chiral phase transition occurs. In this work we briefly review the basic theoretical ideas related to this issue as well as the experiment that could help to establish any of the two scenarios.
Dobado Antonio
Pelaez Jose Ramon
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