June 29, 2015 to July 3, 2015
Pisa
Europe/Rome timezone

Low-energy constants from ALEPH hadronic tau decay data

Jun 30, 2015, 6:10 PM
20m
Aula Magna (Building E, Polo Fibonacci, Pisa)

Aula Magna

Building E, Polo Fibonacci, Pisa

Talk Goldstone Boson Working Group Parallel Session 4 - Goldstone Boson WG

Speaker

Maarten Golterman (San Francisco State University)

Description

We determined the NLO chiral low-energy constant L_10, and various combinations of NNLO chiral low-energy constants employing 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 this talk, we explain the ingredients of this determination. Our errors are at or below the level expected for contributions of yet higher order in the chiral expansion, and we therefore believe that our analysis exhausts the possibilities of what can be meaningfully achieved in an NNLO analysis.

Primary author

Maarten Golterman (San Francisco State University)

Co-authors

Dr Anthony Francis (York University) Prof. Diogo Boito (University of Sao Paulo) Dr Jamie Hudspith (York University) Prof. Kim Maltman (York University) Prof. Randy Lewis (York University) Prof. Santi Peris (Autonomous University of Barcelona)

Presentation materials