The Isgur-Wise Function within a Modified Heavy-Light Chiral Quark Model

Abstract

We consider the Isgur-Wise function xi(omega) within a new modified version of a heavy-light chiral quark model. While early versions of such models gave too small absolute value of the slope, namely xi'(1) of about -0.4 to -0.3, we show how extended version(s) may lead to values around -1, in better agreement with recent measurements. This is obtained by introducing a new mass parameter in the heavy quark propagator. We also shortly comment on the consequences for the decay modes B --> D D-bar.

20 pages, 7 PS figure, LaTeX

References in corpus (8)

• Covariant Light-Front Approach for s-wave and p-wave Mesons: Its Application to Decay Constants and Form Factors
• Averages of b-hadron and c-hadron Properties at the End of 2007
• Color suppressed contributions to the decay modes B_{d,s} -> D_{s,d} D_{s,d}, B_{d,s} -> D_{s,d} D^*_{s,d}, and B_{d,s} -> D^*_{s,d} D^*_{s,d}
• The β-term for D^* --> D γwithin a heavy-light chiral quark model
• Relativistic NJL Model with Light and Heavy Quarks
• Non-factorizable effects in B-anti-B mixing
• Explicit form of the Isgur-Wise function in the BPS limit
• On the Decay Modes $\overline{B_{d,s}^0}\to \gamma D^{\ast 0}$

Cited by in corpus (3)

• Form factors for semileptonic D decays
• Non-factorizable contribtion to $\overline{B_d^0}\to {\pi }^0{D}^0$
• On the color suppressed contribution to $\bar{B_{d}^0} \rightarrow \, π^0 π^{0}