Remarks on the Heavy-Quark Symmetry in the Complex Plane

Abstract

Hadronic systems built from a heavy quark and a cloud of light quarks and massless gluons posess the Isgur-Wise symmetry resulting in certain relations between various form factors. These relations can not be valid in the entire complex plane. We identify contributions which unavoidably violate strongly the symmetry in the time-like domain near thresholds. A possible connection with the heavy-quark phenomenology is discussed in brief.

13 pagess, Latex

Cited by in corpus (7)

• Precision Corrections to Dispersive Bounds on Form Factors
• $|V_{cb}|$ from OPE Sum Rules for Heavy Flavor Transitions
• $B^{\ast }B\pi (\gamma )$ couplings and $D^*\rar Dπ(γ) $-decays within a $1/M$-expansion in $full$ QCD
• Analyticity Properties and Unitarity Constraints of Heavy Meson Form Factors
• Upsilon \bar BB$ Couplings, Slope of the Isgur-Wise Function and Improved Estimate of \boldmath{$V_{cb}$}}
• Dispersive Bounds on The Shape Of Lambda_b to Lambda_c l {\bar ν_l} Formfactors
• Unitarity Constraints on the B and B^* Form Factors from QCD Analyticity and Heavy Meson Spin Symmetry