HADRONIC PRODUCTION OF J-PSI AND UPSILON - TRANSVERSE-MOMENTUM DISTRIBUTIONS
HADRONIC PRODUCTION OF J-PSI AND UPSILON - TRANSVERSE-MOMENTUM DISTRIBUTIONS
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DOI：
10.1016/0370-2693(81)90636-5
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发表时间：
1981-01-01
影响因子：
4.4
通讯作者：
RUCKL, R
中科院分区：
文献类型：
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作者：
BAIER, R;RUCKL, R
在微扰QCD框架下，我们计算了高能质子-质子碰撞中J/π和γ共振的包含pT谱和积分截面.在大横动量下，硬散射过程gg→ 3S 1 g和gq→ 3 P0，1，2 q以及随后的3 PJ → 3S 1 γ衰变是主要的机制.在低pT下的产物由gg→ 3 P0，2→ 3S 1 γ子过程描述。在夸克偶素模型的非相对论近似下处理了重S波和重P波束缚态与胶子的耦合。我们提出了一个详细的比较，这个模型与各种实验的测量。在模型固有的不确定性范围内，它与数据一致。
In the framework of perturbative QCD, we calculate inclusive pTspectra and integrated cross sections for the J/ψ and γ resonances produced in high-energy proton-proton collisions. We consider the hard scattering processes gg→3S1g and gq→3P0,1,2q with subsequent decay3PJ→3S1γas the main mechanisms at large transverse momenta. The production at low pTis described by the subprocesses gg→3P0,2→3S1γ. The coupling of the heavy S- and P-wave bound states to gluons is treated in the nonrelativistic approximation familiar from the quarkonium model. We present a detailed comparison of this model with the measurements of various experiments. Within the uncertainties inherent in the model it is consistent with the data.