The First Moment of the Kaon Distribution Amplitude from N_f=2+1 Domain Wall Fermions

We present a lattice computation of the first moment of the kaon's leading-twist distribution amplitude. We use ensembles with 2+1 dynamical flavours of domain wall fermions and the Iwasaki gauge action from the RBC and UKQCD joint dataset. We observe the expected chiral behaviour and obtain (2...

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Bibliographic Details
Published in:arXiv.org 2006-10
Main Authors: Boyle, P A, Donnellan, M A, Flynn, J M, Juttner, A, Noaki, J, Sachrajda, C T, Tweedie, R J
Format: Article
Language:English
Subjects:
Amplitudes
Domain walls
Fermions
Flavor (particle physics)
Quantum chromodynamics
Online Access:Get full text
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Summary:We present a lattice computation of the first moment of the kaon's leading-twist distribution amplitude. We use ensembles with 2+1 dynamical flavours of domain wall fermions and the Iwasaki gauge action from the RBC and UKQCD joint dataset. We observe the expected chiral behaviour and obtain (2GeV)=3/5a_K^1(2GeV)=0.032(3), which agrees very well with other results obtained using QCD sum-rules and the recent lattice result from the UKQCD/QCDSF collaboration.
ISSN:2331-8422