Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-07-10
Phys.Lett. B488 (2000) 274-282
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 3 figures. Eq (14) corrected
Scientific paper
10.1016/S0370-2693(00)00897-2
We discuss the influence of the vacuum fluctuations of \bar{q}q pairs on low-energy constants and condensates. The analysis of the Goldstone boson masses and decay constants shows that the three-flavour condensate and some low-energy constants are very sensitive to the value of L_6, which measures the Zweig-rule violation in the scalar channel. A chiral sum rule based on experimental data in this channel is used to constrain L_6, confirming a significant decrease between the two- and the three-flavor condensates.
Descotes Sebastien
Stern Jan
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