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Relations among $B_c \to J/\psi, \eta_c$ form factors
- Publication Year :
- 2022
-
Abstract
- We analyze the form factors parametrizing the $B_c \to J/\psi, \eta_c$ matrix elements of the operators in a generalized low-energy $b \to c$ semileptonic Hamiltonian. We consider an expansion in nonrelativistic QCD, classifying the heavy quark spin symmetry breaking terms and expressing the form factors in terms of universal functions in a selected kinematical range. Using as an input the lattice QCD results for the $B_c \to J/\psi$ matrix element of the SM operator, we obtain information on other form factors. The extrapolation to the full kinematical range is also presented.<br />Comment: 32 pages, 4 figures. To appear in JHEP
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2205.08933
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1007/JHEP09(2022)028