Transverse Momentum Spectra of D-and B-mesons in Hadron Collisions at High Energies
Transverse Momentum Spectra of D-and B-mesons in Hadron Collisions at High Energies
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发表时间：
2009
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通讯作者：
Z. Karpova;M. N. Sergeenko;V. Bednyakov
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作者：
Z. Karpova;M. N. Sergeenko;V. Bednyakov
利用改进的夸克-胶子弦模型（QGSM）分析了高能质子-质子和质子-反质子碰撞中产生的迷人介子和美丽介子的横向动量谱。我们得到了由CDF协作在1.5(GeV/c) 6(GeV/c) Tevatron上得到的p−p碰撞中产生的d介子和b介子的pt谱实验数据的满意描述，除了pt非常高的运动区域（pt bbb20 .(GeV/c)）有很大的不确定性。这可能是由于碰撞的质子和反质子内部的胶子的贡献，它们可以与其他胶子和夸克（反夸克）相互作用并分裂成粲介子。这种影响不包括在提出的QGSM中。结果表明，QGSM可以用于分析p−p和p−p碰撞中产生的粲介子和美介子的横向动量谱，其能量达到了LHC的能量。我们还将我们对LHC的预测与ALICE合作在NLO QCD内得到的p−p碰撞的粲夸克和美夸克产生的计算进行了比较。
Transverse momentum spectra of charmed and beauty mesons produced in protonproton and proton-antiproton collisions at high energies are analyzed within the modified quark-gluon string model (QGSM). We got a satisfactory description of the experimental data on pt spectra of Dand B-mesons produced in the p− p̄ collisions which were obtained by the CDF Collaboration at the Tevatron at 1.5(GeV/c) 6(GeV/c), which have a big uncertainty, except for the kinematic region of very high pt, where pt > 20.(GeV/c). It can be due to the contribution of gluons inside the colliding proton and antiproton which can interact with other gluons and quarks(antiquarks) and fragmentate to charmed mesons. This effect is not included in the presented QGSM. The results show that the QGSM can be used to analyze transverse momentum spectra of charmed and beauty mesons produced both in p− p and p− p̄ collisions at very high energies up to the LHC energies. We compare also our predictions for the LHC with the calculations on the charm and beauty quark production in p − p collision obtained within the NLO QCD by the ALICE Collaboration.