Lower and upper bounds on the mass of light quark–antiquark scalar resonance in the SVZ sum rules
2016 ◽
Vol 31
(32)
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pp. 1650164
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Keyword(s):
Ad Hoc
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The calculation of the mass of light scalar isosinglet meson within the Shifman–Vainshtein–Zakharov (SVZ) sum rules is revisited. We develop simple analytical methods for estimation of hadron masses in the SVZ approach and try to reveal the origin of their numerical values. The calculations of hadron parameters in the SVZ sum rules are known to be heavily based on a choice of the perturbative threshold. This choice requires some important ad hoc information. We show analytically that the scalar mass under consideration has a lower and upper bound which are independent of this choice: [Formula: see text] GeV.
2012 ◽
Vol 21
(4)
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pp. 611-622
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Keyword(s):
2013 ◽
Vol 21
(3)
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pp. 241-256
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Keyword(s):
2000 ◽
Vol 32
(01)
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pp. 244-255
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Keyword(s):
2005 ◽
Vol 70
(10)
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pp. 1193-1197
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2013 ◽
Vol 78
(12)
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pp. 1925-1933
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