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Title: Extracting scattering phase shifts in higher partial waves from lattice QCD calculations

Journal Article · · Physical Review. D, Particles, Fields, Gravitation and Cosmology

Lüscher’s method is routinely used to determine meson-meson, meson-baryon, and baryon-baryon s-wave scattering amplitudes below inelastic thresholds from lattice QCD calculations—presently at unphysical light-quark masses. In this work we review the formalism and develop the requisite expressions to extract phase shifts describing meson-meson scattering in partial waves with angular momentum l≤6 and l=9. The implications of the underlying cubic symmetry, and strategies for extracting the phase shifts from lattice QCD calculations, are presented, along with a discussion of the signal-to-noise problem that afflicts the higher partial waves.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
1068270
Report Number(s):
LLNL-JRNL-472171; PRVDAQ
Journal Information:
Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 83, Issue 11; ISSN 1550-7998
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

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