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Type: Journal article
Title: Problems with extracting ms from flavor breaking in hadronic τ decays
Other Titles: Problems with extracting ms from flavor breaking in hadronic tau decays
Author: Maltman, Kim
Citation: Physical Review D, 1998; 58(9):093015
Publisher: American Physical Society
Issue Date: 1998
ISSN: 0556-2821
School/Discipline: School of Chemistry and Physics : Physics and Mathematical Physics
Statement of
Kim Maltman
Abstract: A numerical error is pointed out in the existing expression for the O(αs²) longitudinal component of the squared-mass (D=2) contribution to the hadronic τ decay rate. The corrected version is found to be such that, to O(αs²), each term in the resulting series is larger than the previous one, hence ruling out the direct use of flavor breaking in hadronic τ decays as a means of extracting the strange quark mass. An alternate approach, in which one uses the model spectral functions previously developed for the strangeness-changing scalar channel (and employed in alternate sum rule analyses of ms) as input to the τ decay analysis, is shown to provide mutual consistency checks for the two different methods. The results for ms implied by τ decay data and the existing model spectral function are also presented.
Rights: © 1998 The American Physical Society
DOI: 10.1103/PhysRevD.58.093015
Appears in Collections:Special Research Centre for the Subatomic Structure of Matter publications

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