Reconstruction of B-→ D*0 e- $$\bar{v}$$e Decays and Determination of |Vcb|
- Stanford Univ., CA (United States)
In this analysis the decay B-→ D*0 e- $$\bar{v}$$e is measured. The underlying data sampel consists of about 226 million B$$\bar{B}$$-pairs accumulated on the Y(4S) resonance by the BABAR detector at the asymmetric e+e- collider PEP-II. The reconstruction of the decay uses the channels D*0→D0π0, D0 → K-π+ and π0 → γγ. The neutrino is not reconstructed. Since the rest frame of the B meson is unknown, the boost w of the D*0 meson in the B meson rest frame is estimated by $$\bar{w}$$. The $$\bar{w}$$ spectrum of the data is described in terms of the partial decay width dΓ/dw into an expectation of the measured $$\bar{w}$$ spectrum. dΓ/dw depends on a form factor F(w) parameterizing the strong interaction in the decay process. To find the best descriptive dΓ/dw a fit to the data determines the following two parameters of dΓ/dw: (i) F(1)|Vcb|, the product between F at zero D*0 recoil and the CKM matrix element |Vcb|; (ii) ρ$$2\atop{A1}$$, a parameter of the form factor F(w). The former parameter scales the height of dΓ/dw and ρ$$2\atop{A1}$$ varies the shape of it.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 915390
- Report Number(s):
- SLAC-R-876; TRN: US0804978
- Country of Publication:
- United States
- Language:
- English
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