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

K-pi scattering lengths from lattice QCD

Jun 29, 2015, 5:20 PM
20m
Aula Magna (Building E, Polo Fibonacci, Pisa)

Aula Magna

Building E, Polo Fibonacci, Pisa

Talk Goldstone Boson Working Group Parallel Session 2 - Goldstone Boson WG

Speaker

Tadeusz Janowski (University of Southampton)

Description

We present the recent lattice QCD calculation of K-π I=3/2 and I=1/2 scattering lengths by the RBC-UKQCD collaboration. Our calculation is the first lattice calculation of these quantities performed using physical point ensembles [1]. This allows us to bypass the error due to chiral extrapolation, which in current calculations is the dominant source of systematic errors [2,3,4,5]. Preliminary results are presented and compared to those from earlier studies which were obtained at heavier pion masses and extrapolated to the physical point. References 1. T. Blum et al. [RBC and UKQCD Collaborations], “Domain wall QCD with physical quark masses,” arXiv:1411.7017 [hep-lat] 2. S. R. Beane, P. F. Bedaque, T. C. Luu, K. Orginos, E. Pallante, A. Parreno and M. J. Savage, Phys. Rev. D 74 (2006) 114503 [hep-lat/0607036]. 3. Z. Fu, JHEP 1201 (2012) 017 [arXiv:1110.5975 [hep-lat]]. 4. Z. Fu, Phys. Rev. D 85 (2012) 074501 [arXiv:1110.1422 [hep-lat]]. 5. K. Sasaki et al. [PACS-CS Collaboration], Phys. Rev. D 89(2014) 054502 [arXiv:1311.7226[hep-lat]].

Primary author

Tadeusz Janowski (University of Southampton)

Co-authors

Dr Andreas Juettner (Univ. of Southampton) Prof. Christopher Sachrajda (University of Southampton) Dr Peter Boyle (University of Edinburgh)

Presentation materials