Violations of local duality in the heavy quark sector
Journal Article
1997
Permanent link to this Item
Authors
Journal Title
Physics Letters, B
Link to Journal
Journal ISSN
Volume Title
Publisher
Publisher
Department
Faculty
License
Series
Abstract
We examine the origin of possible failures of the quark-hadron local duality. In particular, we consider a correlator of two currents comprising heavy quark operators, and compare the evaluation by the Operator Product Expansion with the result obtained inserting an infinite set of hadronic states, in the Nc → ∞ limit. Whereas the smeared spectral functions agree with each other, their local behaviour is different. The difference manifests itself in the form of a term () (ϵ being the residual energy) that is not present in the expansion in powers of predicted by the OPE.
Description
Reference:
Colangelo, P., Dominguez, C.A. & Nardulli, G. 1997. Violations of local duality in the heavy quark sector. Physics Letters, B. 409(43104):417 - 424. http://hdl.handle.net/11427/34661