Details

Autor(en) / Beteiligte

• Drutskoy, A.
• Goldenzweig, P.
• Kinoshita, K.
• Kulasiri, R.
• Schwartz, A. J.
• Somov, A.
• Abe, K.
• Adachi, I.
• Dragic, J.
• Gershon, T.
• Haba, J.
• Hazumi, M.
• Higuchi, T.
• Itoh, R.
• Iwasaki, Y.
• Katayama, N.
• Kichimi, H.
• Krokovny, P.
• Limosani, A.
• Nakao, M.

Titel

Measurement of Inclusive D{sub s}, D{sup 0}, and J/{psi} Rates and Determination of the B{sub s}{sup ()}B{sub s}{sup ()} Production Fraction in bb Events at the {upsilon}(5S) Resonance

Ist Teil von

• Physical review letters, 2007-02, Vol.98 (5)

Ort / Verlag

United States

Erscheinungsjahr

2007

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• The inclusive production of D{sub s}, D{sup 0}, and J/{psi} mesons is studied using a 1.86 fb{sup -1} data sample collected on the {upsilon}(5S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. The number of bb events in this {upsilon}(5S) data sample is determined. We measure the branching fractions B({upsilon}(5S){yields}D{sub s}X)/2=(23.6{+-}1.2{+-}3.6)%, B({upsilon}(5S){yields}D{sup 0}X)/2=(53.8{+-}2.0{+-}3.4)%, and B({upsilon}(5S){yields}J/{psi}X)/2=(1.030{+-}0.080{+-}0.067)%. From the D{sub s} and D{sup 0} inclusive branching fractions the ratio f{sub s}=(18.0{+-}1.3{+-}3.2)% of B{sub s}{sup (*)}B{sub s}{sup (*)} to the total bb quark pair production at the {upsilon}(5S) energy is obtained in a model-dependent way.