First measurement of the B$$0\atop{2}$$ semileptonic branching ratio to an orbitally excited d$$**\atop{s}$$ state, Br(B$$0\atop{2}$$ → D$$-\atop{s1}$$(2536)μ+vX)
- Indiana Univ., Bloomington, IN (United States)
In a data sample of approximately 1.3 fb-1 collected with the D0 detector between 2002 and 2006, the orbitally excited charm state D$$±\atop{s1}$$(2536)has been observed with a measured mass of 2535.7 ± 0.6(stat) ± 0.5(syst) MeV/c2 via the decay mode B$$0\atop{s}$$ → D$$-\atop{s1}$$(2536)μ+vX followed by D$$±\atop{s1}$$(2536) → D*±K$$0\atop{S}$$. By normalizing to the known branching ratio Br($$\bar{b}$$ → D*- μ+vX) and to the number of reconstructed D* mesons with an associated identified muon, a first-ever measurement is made of the product branching ratio ($$\bar{b}$$ →} D$$-\atop{s1}$$(2536)μ+vX) • Br(D$$-\atop{s1}$$ → D*-K$$0\atop{S}$$). Assuming that D$$-\atop{s1}$$(2536) production in semileptonic decay is entirely from B$$0\atop{s}$$, an extraction of the semileptonic branching ratio Br(B$$0\atop{s}$$ → D$$-\atop{s1}$$(2536)μ+vX) is made. Comparisons are made with theoretical expectations.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 922735
- Report Number(s):
- FERMILAB-THESIS-2007-46; TRN: US0801954
- Country of Publication:
- United States
- Language:
- English
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