Dependence of the current renormalisation constants on the quark mass

We study the behaviour of the vector and axial current renormalisation constants Z_V and Z_A as a function of the quark mass, m_q. We show that sizeable O(am_q) and O(g_0^2 a m_q) systematic effects are present in the Wilson and Clover cases respectively. We find that the prescription of Kronfeld, L...

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Detalles Bibliográficos
Autores principales: Crisafulli, M., Lubicz, V., Martinelli, G., Vladikas, A.
Lenguaje:eng
Publicado: 1995
Materias:
Particle Physics - Lattice
Acceso en línea:https://dx.doi.org/10.1016/0920-5632(95)00262-8
http://cds.cern.ch/record/277118
Descripción
Sumario:We study the behaviour of the vector and axial current renormalisation constants Z_V and Z_A as a function of the quark mass, m_q. We show that sizeable O(am_q) and O(g_0^2 a m_q) systematic effects are present in the Wilson and Clover cases respectively. We find that the prescription of Kronfeld, Lepage and Mackenzie for correcting these artefacts is not always successful.

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