TY - JOUR
T1 - Possible duality violations in τ decay and their impact on the determination of αs
AU - Catà, Oscar
AU - Golterman, Maarten
AU - Peris, Santiago
PY - 2009/3/2
Y1 - 2009/3/2
N2 - We discuss the issue of duality violations in hadronic tau decay. After introducing a physically motivated ansatz for duality violations, we estimate their possible size by fitting this ansatz to the tau experimental data provided by the ALEPH Collaboration. Our conclusion is that these data do not exclude significant duality violations in tau decay. This may imply an additional systematic error in the value of αs(mτ), extracted from tau decay, as large as δαs(mτ)∼0.003-0.010. © 2009 The American Physical Society.
AB - We discuss the issue of duality violations in hadronic tau decay. After introducing a physically motivated ansatz for duality violations, we estimate their possible size by fitting this ansatz to the tau experimental data provided by the ALEPH Collaboration. Our conclusion is that these data do not exclude significant duality violations in tau decay. This may imply an additional systematic error in the value of αs(mτ), extracted from tau decay, as large as δαs(mτ)∼0.003-0.010. © 2009 The American Physical Society.
UR - https://www.scopus.com/pages/publications/63149163717
U2 - 10.1103/PhysRevD.79.053002
DO - 10.1103/PhysRevD.79.053002
M3 - Article
SN - 1550-7998
VL - 79
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 5
M1 - 053002
ER -