This title appears in the Scientific Report :
2012
Please use the identifier:
http://hdl.handle.net/2128/13286 in citations.
Please use the identifier: http://dx.doi.org/10.1007/JHEP01(2012)009 in citations.
Finite volume effects in pionkaon scattering and reconstruction of the kappa (800) resonance
Finite volume effects in pionkaon scattering and reconstruction of the kappa (800) resonance
Simulating the kappa(800) on the lattice is a challenging task that starts to become feasible due to the rapid progress in recentyears lattice QCD calculations. As the resonance is broad, special attention to finitevolume effects has to be paid, because no sharp resonance signal as from avoided le...
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Personal Name(s):  Döring, M. (Corresponding author) 

Meißner, U.G.  
Contributing Institute: 
Theorie der starken Wechselwirkung; IKP3 Institut 3 (Theoretische Kernphysik); IKPTH Theorie der Starken Wechselwirkung; IAS4 
Published in:  Journal of high energy physics, 1201 (2012) 1, S. 009 
Imprint: 
Berlin
Springer
2012

DOI: 
10.1007/JHEP01(2012)009 
Document Type: 
Journal Article 
Research Program: 
Hadron Structure and Dynamics (HSD) 
Subject (ZB):  
Link: 
OpenAccess OpenAccess 
Publikationsportal JuSER 
Please use the identifier: http://dx.doi.org/10.1007/JHEP01(2012)009 in citations.
Simulating the kappa(800) on the lattice is a challenging task that starts to become feasible due to the rapid progress in recentyears lattice QCD calculations. As the resonance is broad, special attention to finitevolume effects has to be paid, because no sharp resonance signal as from avoided level crossing can be expected. In the present article, we investigate the finite volume effects in the framework of unitarized chiral perturbation theory using nexttoleading order terms. After a fit to mesonmeson partial wave data, lattice levels for piK scattering are predicted. In addition, levels are shown for the quantum numbers in which the sigma(600), f_0(980), a_0(980), phi(1020), K*(892), and rho(770) appear, as well as the repulsive channels. Methods to extract the kappa(800) signal from the lattice spectrum are presented. Using pseudodata, we estimate the precision that lattice data should have to allow for a clearcut extraction of this resonance. To put the results into context, in particular the required high precision on the lattice data, the sigma(600), the Pwave resonances K*(892) and rho(770), and the repulsive piK, pipi phases are analyzed as well. 