The inclusive model of semileptonic decays B→ℓvX can be appreciably improved by considering the observed dependence on hadronic invariant mass mx, in addition to the lepton energy spectrum that is usually discussed. The parameter freedom is thereby reduced, but the model can successfully reproduce the D and D* enhancements in the mx distribution, while simultaneously fitting the lepton energy distribution. With these improvements the model provides a more reliable basis for determining KM matrix elements from inclusive data.
Bibliographical noteFunding Information:
We thank K. Hagiwara for a stimulating conversation. This research was supported in part by the University of Wisconsin Research Committee with funds granted by the Wisconsin Alumni Research Foundation, and in part by the US Department of Energy under contract DE-AC02-76ER00881. The work of C.S.K. is supported in part by the UK Science and Engineering Research Council.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics