Fragmentation of Light Initial Quarks into Charm Measons in e<SUP>+</SUP>e<SUP>－</SUP> Annihilation

JIN Yi; LI Shi-Yuan; XIE Qu-Bing

Chinese Physics C> 2003, Vol. 27> Issue(10) : 852-856

Fragmentation of Light Initial Quarks into Charm Measons in e⁺e^－ Annihilation

School of Physics and Microelectronics,Shandong University,Ji'nan 250100,China

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Abstract：
We study the process that the light initial quarks produced in e+ e- annihilation combine with the c from glu-on splitting to form D's (D-+D6-+D0) or D 's(D-*+ Ds*-+D*0). The 'light + heavy' bound state is described by light-cone wavefunction. The contribution of this process to D (D ) production at Z⁰ pole is much larger compared with that in lower energies (e.g. 10.6GeV) . For this special process, the invariant mass of D(D) and the charm had-ron fragmented from the c quark has a unique spectrum which peaks near 2 MB if we constrain the D(D*) from all processes with energy larger than 20GeV. It is also noticeable that the produced D* in this process is dominantly longitudinally polarized, which is consistent with the OPAL data.

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[1]

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JIN Yi, LI Shi-Yuan and XIE Qu-Bing. Fragmentation of Light Initial Quarks into Charm Measons in e⁺e^－ Annihilation[J]. Chinese Physics C, 2003, 27(10): 852-856.

JIN Yi, LI Shi-Yuan and XIE Qu-Bing. Fragmentation of Light Initial Quarks into Charm Measons in e⁺e^－ Annihilation[J]. Chinese Physics C, 2003, 27(10): 852-856. shu

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Received: 2003-02-17
Revised: 1900-01-01

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通讯作者: 陈斌, [email protected]

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沈阳化工大学材料科学与工程学院沈阳 110142

Fragmentation of Light Initial Quarks into Charm Measons in e⁺e^－ Annihilation

Corresponding author: JIN Yi,

School of Physics and Microelectronics,Shandong University,Ji'nan 250100,China

Received Date: 2003-02-17

Accepted Date: 1900-01-01

Available Online: 2003-10-05

Abstract: We study the process that the light initial quarks produced in e+ e- annihilation combine with the c from glu-on splitting to form D's (D-+D6-+D0) or D 's(D-*+ Ds*-+D*0). The 'light + heavy' bound state is described by light-cone wavefunction. The contribution of this process to D (D ) production at Z⁰ pole is much larger compared with that in lower energies (e.g. 10.6GeV) . For this special process, the invariant mass of D(D) and the charm had-ron fragmented from the c quark has a unique spectrum which peaks near 2 MB if we constrain the D(D*) from all processes with energy larger than 20GeV. It is also noticeable that the produced D* in this process is dominantly longitudinally polarized, which is consistent with the OPAL data.

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Fragmentation of Light Initial Quarks into Charm Measons in e⁺e^－ Annihilation

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Fragmentation of Light Initial Quarks into Charm Measons in e+e－ Annihilation

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通讯作者: 陈斌, [email protected]

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Fragmentation of Light Initial Quarks into Charm Measons in e⁺e^－ Annihilation

Fragmentation of Light Initial Quarks into Charm Measons in e⁺e^－ Annihilation