Lattice Input on the tau V-us Puzzle

K. Maltman; P. A. Boyle; Luigi Del Debbio; R. J. Hudspith; N. Garron; E. Kerrane; J. M. Zanotti

doi:10.1016/j.nuclphysbps.2014.09.013

Lattice Input on the tau V-us Puzzle

K. Maltman^*, P. A. Boyle, Luigi Del Debbio, R. J. Hudspith, N. Garron, E. Kerrane, J. M. Zanotti

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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
Pages (from-to)	52-55
Number of pages	4
Journal	Nuclear Physics B - Proceedings Supplements
Volume	253
DOIs	https://doi.org/10.1016/j.nuclphysbps.2014.09.013
Publication status	Published - 2014
Event	12th International Workshop on Tau-Lepton Physics - Nagoya, Japan Duration: 17 Sep 2012 → 21 Sep 2012

Keywords

vertical bar V-us vertical bar
tau decays
lattice QCD
sum rules
SPECTRAL FUNCTIONS
MASS

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10.1016/j.nuclphysbps.2014.09.013

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Particle Theory at the Tait Institute
Ball, R., Berera, A., Boyle, P., Del Debbio, L., Figueroa-O'Farrill, J., Gardi, E., Horsley, R., Kennedy, A., Kenway, R., Pendleton, B. & Simon Soler, J.
STFC
1/10/11 → 30/09/15
Project: Research

Cite this

@article{65ca39115be4413bb93b96817a40c962,

title = "Lattice Input on the tau V-us Puzzle",

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.",

keywords = "vertical bar V-us vertical bar, tau decays, lattice QCD, sum rules, SPECTRAL FUNCTIONS, MASS",

author = "K. Maltman and Boyle, {P. A.} and {Del Debbio}, Luigi and Hudspith, {R. J.} and N. Garron and E. Kerrane and Zanotti, {J. M.}",

year = "2014",

doi = "10.1016/j.nuclphysbps.2014.09.013",

language = "English",

volume = "253",

pages = "52--55",

journal = "Nuclear Physics B - Proceedings Supplements",

issn = "0920-5632",

publisher = "Elsevier",

note = "12th International Workshop on Tau-Lepton Physics ; Conference date: 17-09-2012 Through 21-09-2012",

}

TY - JOUR

T1 - Lattice Input on the tau V-us Puzzle

AU - Maltman, K.

AU - Boyle, P. A.

AU - Del Debbio, Luigi

AU - Hudspith, R. J.

AU - Garron, N.

AU - Kerrane, E.

AU - Zanotti, J. M.

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

KW - vertical bar V-us vertical bar

KW - tau decays

KW - lattice QCD

KW - sum rules

KW - SPECTRAL FUNCTIONS

KW - MASS

U2 - 10.1016/j.nuclphysbps.2014.09.013

DO - 10.1016/j.nuclphysbps.2014.09.013

M3 - Article

VL - 253

SP - 52

EP - 55

JO - Nuclear Physics B - Proceedings Supplements

JF - Nuclear Physics B - Proceedings Supplements

SN - 0920-5632

T2 - 12th International Workshop on Tau-Lepton Physics

Y2 - 17 September 2012 through 21 September 2012

ER -

Lattice Input on the tau V-us Puzzle

Abstract

Keywords

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Particle Theory at the Tait Institute

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