INCLUSIVE J-PRODUCTION IN Z(0) DECAYS

INCLUSIVE J-PRODUCTION IN Z(0) DECAYS

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...

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Detaylı Bibliyografya
Asıl Yazarlar: Adriani, O, Aguilarbenitez, M, Ahlen, S, Akbari, H, Alcaraz, J, Aloisio, A, Alverson, G, Alviggi, M, Ambrosi, G, An, Q, Anderhub, H, Anderson, A, Andreev, V, Angelov, T, Antonov, L, Antreasyan, D, Arce, P, Arefiev, A, Atamanchuk, A, Azemoon, T, Aziz, T, Baba, P, Bagnaia, P, Bakken, J, Baksay, L
Materyal Türü: Journal article
Baskı/Yayın Bilgisi: 1992
Diğer Bilgiler
Özet: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(Z0 → qqg*;g* → J + X) < 7.0 × 10-4at 90% confidence level. © 1992.

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