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• W4313304088 abstract "We study violation of quark-hadron duality for $bar{B}to X_ulnu$ and $Dto X_dlnu$ decays in the presence of the right-handed current operator. For this case, we show that duality violation has some aspects different from the standard model due to the existence of an instanton. In particular, the fermionic zero mode of an intermediate light quark can give a nonvanishing contribution owing to its chirality structure. A duality-violating component that arises from a single instanton is then analytically extracted as a finite-distance singularity, leading to an oscillatory correction to the observable in Minkowski space. Finally, we show that the size of duality violation for the lepton energy distribution in $bar{B}$ decays can be comparable to the chirally suppressed perturbative contribution although the absolute size depends on the detail of the QCD vacuum." @default.
• W4313304088 created "2023-01-06" @default.
• W4313304088 creator A5081822989 @default.
• W4313304088 date "2022-12-30" @default.
• W4313304088 modified "2023-10-14" @default.
• W4313304088 title "Is the right-handed current contribution to <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mover accent=true><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy=false>¯</mml:mo></mml:mrow></mml:mover><mml:mo stretchy=false>→</mml:mo><mml:msub><mml:mrow><mml:mi>X</mml:mi></mml:mrow><mml:mrow><mml:mi>u</mml:mi></mml:mrow></mml:msub><mml:mi>l</mml:mi><mml:mi>ν</mml:mi></mml:mrow></mml:math> decays corrected by the nontrivial vacuum in …" @default.
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• W4313304088 doi "https://doi.org/10.1103/physrevd.106.114034" @default.
• W4313304088 hasPublicationYear "2022" @default.
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