Contribution to a conference proceedings/Contribution to a book

FZJ-2018-07095

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png $K \pi$ scattering and the $K^*(892)$ resonance in 2+1 flavor QCD

Rendon, G. (Corresponding author) ; Leskovec, L. ; Meinel, S. ; Negele, J. ; Paul, S. ; Petschlies, M. ; Pochinsky, A. ; Silvi, G.FZJ* ; Syritsyn, S.

2019
SISSA Trieste

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Please use a persistent id in citations: http://hdl.handle.net/2128/21483

Abstract: In this project, we will compute the form factors relevant for $B \to K^*(\to K \pi)\ell^+\ell^-$ decays. To map the finite-volume matrix elements computed on the lattice to the infinite-volume $B \to K \pi$ matrix elements, the $K \pi$ scattering amplitude needs to be determined using L\'uscher's method. Here we present preliminary results from our calculations with $2+1$ flavors of dynamical clover fermions. We extract the $P$-wave scattering phase shifts and determine the $K^*$ resonance mass and the $K^* K \pi$ coupling for two different ensembles with pion masses of $317(2)$ and $178(2)$ MeV.

Note: 7 pages, 3 figures, Proceedings of the 36th Annual International Symposium on Lattice Field Theory (Lattice 2018), 22-28 July 2018, Michigan State University, East Lansing, Michigan USA

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 511 - Computational Science and Mathematical Methods (POF3-511) (POF3-511)
2. PhD no Grant - Doktorand ohne besondere Förderung (PHD-NO-GRANT-20170405) (PHD-NO-GRANT-20170405)

Appears in the scientific report 2019

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