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On systematic errors due to quenching inε′/ε

✍ Scribed by Maarten Golterman; Elisabetta Pallanteb

Book ID
104354340
Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
125 KB
Volume
119
Category
Article
ISSN
0920-5632

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✦ Synopsis

Recently, we pointed out that chiral transformation properties of penguin operators change in the transition from unquenched to (partially) quenched &CD. As a consequence, new operators appear in (partially) quenched QCD penguins, introducing ambiguities which should be considered a quenching artifact. Here we discuss more specifically the effects of this phenomenon on the quenched AI = l/2 K --+ ~7r amplitude, and in particular, its potential numerical effect on recent lattice estimates for E//E.

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