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Gimenez, V.; Penarrocha, J.A.; Bordes, J.
Rutherford Appleton Lab., Chilton (UK)1989
Rutherford Appleton Lab., Chilton (UK)1989
AbstractAbstract
[en] We use quotients of Laplace sum rules to calculate ratios among QCD condensates from τ decay data in the axial channel. The gluon and the dimension-six four quark condensates are estimated. For the gluon condensate we obtain π/3 < α8 GG >= (0.06 ± 0.03) Gev 4 which is in agreement with other recent estimates. For the four quark condensate we find about a factor of two larger than the value obtained assuming vacuum saturation. The dimension-eight condensates are also analysed. (author)
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Jan 1989; 14 p
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