We determine a basis of dimension-7 operators which arise at O(a) in the Symanzik expansion of the ∆B = 2 operators with static heavy quarks. We consider both Wilson-like and Ginsparg-Wilson light quarks. Exact chiral symmetry reduces the number of these O(a) counterterms by a factor of two. Only a subset of these operators has previously appeared in the literature. We then extend the analysis to the O(1/m) operators contributing beyond the static approximation.
Renormalization of HQET Delta B=2 operators: O(a) improvement and 1/m matching with QCD / Papinutto, MAURO LUCIO; G., Herdoiza; C., Pena; A., Vladikas. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - LATTICE2013:(2014). (Intervento presentato al convegno 31st International Symposium on Lattice Field Theory (Lattice 2013) tenutosi a Mainz, Germany).
Renormalization of HQET Delta B=2 operators: O(a) improvement and 1/m matching with QCD
PAPINUTTO, MAURO LUCIO;
2014
Abstract
We determine a basis of dimension-7 operators which arise at O(a) in the Symanzik expansion of the ∆B = 2 operators with static heavy quarks. We consider both Wilson-like and Ginsparg-Wilson light quarks. Exact chiral symmetry reduces the number of these O(a) counterterms by a factor of two. Only a subset of these operators has previously appeared in the literature. We then extend the analysis to the O(1/m) operators contributing beyond the static approximation.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
