Scalar mesons moving in a finite volume and the role of partial wave mixing
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Scalar mesons moving in a finite volume and the role of partial wave mixing

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Scalar mesons moving in a finite volume and the role of partial wave mixing

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Döring, Michael; Meissner, Ulf-G.; Oset Báguena, Eulogio Perfil; Rusetsky, A.
Aquest document és un/a article, creat/da en: 2012
Phase shifts and resonance parameters can be obtained from finite-volume lattice spectra for interacting pairs of particles, moving with nonzero total momentum. We present a simple derivation of the method that is subsequently applied to obtain the pi pi and pi K phase shifts in the sectors with total isospin I=0 and I=1/2, respectively. Considering different total momenta, one obtains extra data points for a given volume that allow for a very efficient extraction of the resonance parameters in the infinite-volume limit. Corrections due to the mixing of partial waves are provided. We expect that our results will help to optimize the strategies in lattice simulations, which aim at an accurate determination of the scattering and resonance properties.

    Döring, Michael Meissner, Ulf-G. Oset Báguena, Eulogio Rusetsky, A. 2012 Scalar mesons moving in a finite volume and the role of partial wave mixing European Physical Journal A 48 8 114
http://dx.doi.org/10.1140/epja/i2012-12114-6
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