Inclusive J production in Z0 decays

Adriani, O. ; Aguilar-Benitez, M. ; Ahlen, S. ; Gurtu, A. ; et., al (1992) Inclusive J production in Z0 decays Physics Letters B, 288 (3-4). pp. 412-420. ISSN 0370-2693

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Inclusive J production in Z0 decays is observed via the leptonic decay mode J → ℓ+ℓ− (ℓ = e,μ). We measure the branching ratio Br(Z0 → J + X) = (4.1 ± 0.7 (stat.) ± 0.3 (sys.)) × 10−3. We have calculated the fraction of the J mesons from b-hadron decay and find a branching ratio of Br(b → J + X)= (1.3±0.2(stat.)±0.2(sys.)) × 10−2. We determine the average fractional energy of bottom hadrons 〈XE > = 0.70±0.03 (stat.) +0.02−0.01 (sys.) using the momentum spectrum of the J mesons. From a study of the angle between the J and the most energetic jet, we set an upper limit on the branching ratio Br(0 → qq̅g*; g* → J+x)< 7.0 ×10(-4 at 90% confidence level.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:83332
Deposited On:20 Feb 2012 06:14
Last Modified:20 Feb 2012 06:14

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