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Abstract
vertical bar V-us vertical bar values obtained from recent hadronic-tau-decay-based flavor-breaking sum rule analyses are significantly lower than expectations based on 3-family unitarity and results obtained from other sources. We use lattice data to investigate the accuracy/reliability of the OPE representation of the flavor-breaking correlator combination entering these analyses. The behavior of an alternate combination, chosen to reduce problems associated with the slow convergence of the D = 2 OPE series, and entering an alternate mixed tau-electroproduction sum rule, is also investigated. Preliminary updates of both analyses, predicated on lessons learned from the lattice data, are also presented.
Original language | English |
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Pages (from-to) | 52-55 |
Number of pages | 4 |
Journal | Nuclear Physics B - Proceedings Supplements |
Volume | 253 |
DOIs | |
Publication status | Published - 2014 |
Event | 12th International Workshop on Tau-Lepton Physics - Nagoya, Japan Duration: 17 Sept 2012 → 21 Sept 2012 |
Keywords / Materials (for Non-textual outputs)
- vertical bar V-us vertical bar
- tau decays
- lattice QCD
- sum rules
- SPECTRAL FUNCTIONS
- MASS
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Dive into the research topics of 'Lattice Input on the tau V-us Puzzle'. Together they form a unique fingerprint.Projects
- 1 Finished
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Particle Theory at the Tait Institute
Ball, R. (Principal Investigator), Berera, A. (Co-investigator), Boyle, P. (Co-investigator), Del Debbio, L. (Co-investigator), Figueroa-O'Farrill, J. (Co-investigator), Gardi, E. (Co-investigator), Horsley, R. (Co-investigator), Kennedy, A. (Co-investigator), Kenway, R. (Co-investigator), Pendleton, B. (Co-investigator) & Simon Soler, J. (Co-investigator)
1/10/11 → 30/09/15
Project: Research