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Low-energy constants and condensates from ALEPH hadronic $\tau$ decay data
- Source :
- Phys. Rev. D 92, 114501 (2015)
- Publication Year :
- 2015
-
Abstract
- We determine the NLO chiral low-energy constant $L_{10}^r$, and combinations $C_{12}^r\pm C_{61}^r+C_{80}^r$, $C_{13}^r-C_{62}^r+C_{81}^r$, $C_{61}^r$, and $C_{87}^r$, of the NNLO chiral low-energy constants incorporating recently revised ALEPH results for the non-strange vector ($V$) and axial-vector ($A$) hadronic $\tau$ decay distributions and recently updated RBC/UKQCD lattice data for the non-strange $V-A$ two-point function. In the $\bar{\rm MS}$ scheme, at renormalization scale $\mu=770\ {MeV}$, we find $L_{10}^r=-0.00350(17)$, $C_{12}^r+C_{61}^r+C_{80}^r=0.00237(16)\ {GeV}^{-2}$, $C_{12}^r-C_{61}^r+C_{80}^r=-0.00056(15)\ {GeV}^{-2}$, $C_{13}^r-C_{62}^r+C_{81}^r=0.00046(9)\ {GeV}^{-2}$, $C_{61}^r=0.00146(15)\ {GeV}^{-2}$, and $C_{87}^r=0.00510(22)\ {GeV}^{-2}$. With errors here at or below the level expected for contributions of yet higher order in the chiral expansion, the analysis exhausts the possibilities of what can be meaningfully achieved in an NNLO analysis. We also consider the dimension six and dimension eight coefficients in the operator product expansion in the $V-A$ channel.<br />Comment: 16 pages, revtex
- Subjects :
- High Energy Physics - Phenomenology
High Energy Physics - Lattice
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. D 92, 114501 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1503.03450
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevD.92.114501