Estimating excited states contamination of B → π form factors using heavy meson chiral perturbation theory

2022/10/13 by Bär, Oliver, Broll, Alexander, Sommer, Rainer
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat)

paper · doi:10.48550/arxiv.2210.06863

Abstract

Using Heavy Meson Chiral Perturbation Theory (HMChPT), the B^* π excited states contamination of the B → π vector form factors is computed to NLO in the chiral expansion and in the static limit. The results suggest that the excited states for h_∥ are of the order of a few percent whereas h_⊥ receives large negative contributions and thus might be significantly underestimated in lattice simulations.

Related

• Bπ excited-state contamination in lattice calculations of B-meson correlation functions
• Bπ-state contamination in B-meson observables
• Nucleon form factors and the pion-nucleon sigma term
• Excited-state contamination in nucleon correlators from chiral perturbation theory
• Nucleon-pion-state contamination in lattice calculations of the axial form factors of the nucleon