Predictive ability of QCD sum rules for decuplet baryons
نویسندگان
چکیده
منابع مشابه
Predicative Ability of QCD Sum Rules for Decuplet Baryons
QCD sum rules for decuplet baryon two-point functions are investigated using a comprehensive Monte-Carlo based procedure. In this procedure, all uncertainties in the QCD input parameters are incorporated simultaneously, resulting in realistic estimates of the uncertainties in the extracted phenomenological parameters. Correlations between the QCD input parameters and the phenomenological parame...
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The masses of octet baryons are calculated by the method of QCD sum rules. Using generalized interpolating fields, three independent sets of QCD sum rules are derived which allow the extraction of low-lying N* states with spin-parity 1/2+, 1/2and 3/2in both the non-strange and strange channels. The predictive ability of the sum rules is examined by a Monte-Carlo based analysis procedure in whic...
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A complete set of QCD sum rules for the magnetic moments of decuplet baryons are derived using the external field method. They are analyzed thoroughly using a Monte-Carlo based procedure. Valid sum rules are identified under the criteria of OPE convergence and ground state dominance and their predictions are obtained. The performances of these sum rules are further compared and a favorable sum ...
متن کاملErratum: Isospin violation in QCD sum rules for baryons
PACS number(s): 11.55.Hx. , 11.30.Hv, 14.20.Dh, 99.10.+g In a recent paper [1], it was brought to our attention that some numerical factors in our equations were in error. In Eq. (3.12), the second sum rule for the nucleon, the term reading —za2 should read —za . As a consequence, the term sa2 in Eq. (3.34) is replaced by &a . There is also a change in the sum rule for the Z hyperons. In Eq. (3...
متن کاملIsospin violation in QCD sum rules for baryons.
We thoroughly analyze isospin-violating effects in QCD sum rules for the masses of nucleons, X, and :hyperons. After comparing with experimental mass splittings in isotopic multiplets, we obtain for the isospin breaking in the quark condensate (0~uu —dd ~0) /(0~uu ~0) =(2+1)X 10 ', a value significantly smaller than the one usually adopted. We present arguments in favor of our result and critic...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 1998
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.57.322