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首页> 美国卫生研究院文献>Scientific Reports >Hadron production models’ prediction for pT distribution of charged hadrons in pp interactions at 7 TeV
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Hadron production models’ prediction for pT distribution of charged hadrons in pp interactions at 7 TeV

机译：强子生产模型对7 TeV pp相互作用中带电强子的pT分布的预测

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摘要

The yield of transverse momentum (pT) spectra of integrated hadrons and their ratios produced in pp collisions at 7 TeV are reported using DPMJET-III, EPOS1.99, EPOS-LHC, HIJING1.383, QGSJETII-04, and Sibyll2.3c models. The models’ predictions are compared with the ALICE measurements obtained at mid rapidity and in the pT range from 0.3–6 GeV/c, 0.2–6 GeV/c, and 0.1–3 GeV/c for protons, kaons and pions respectively. Compared to the experimental data, the EPOS1.99 and EPOS-LHC models predict the yield of pion very well while reproducing yields of kaon and proton at low pT only. The DPMJET-III model predicts the yield of pions, kaons and protons only at intermediate value of pT. The HIJING and Sibyll models describe the integrated yield of pion well at high pT only. The QGSJETII model predicts the yield of kaon for almost the whole pT range. EPOS1.99 and Sibyll models reproduce excellent prediction of the K/π ratio over the entire range of pT whereas the EPOS-LHC, HIJING and DPMJET models underpredict with increasing order of discrepancy respectively. The EPOS1.99, EPOS-LHC, and Sibyll models predict the p/π ratio for low values of pT, but overpredict at high values, while the DPMJET-III and HIJING models underpredict over the entire range of pT. Although the models’ predictions are mostly consistent with the ALICE measurements but none of the models completely describe the entire distribution for the integrated yield of hadron and their ratios.
机译：使用DPMJET-III，EPOS1.99，EPOS-LHC，HIJING1.383，QGSJETII-04和Sibyll2.3c模型报告了集成强子的横向动量（pT）谱的产量及其在7 TeV pp碰撞中产生的比率。将模型的预测与中等速度下质子，钾离子和介子的pT分别在0.3-6–GeV / c，0.2-6 GeV / c和0.1-3 GeV / c范围内获得的ALICE测量值进行比较。与实验数据相比，EPOS1.99和EPOS-LHC模型非常好地预测了介子的产率，而仅在低pT时重现了钾离子和质子的产率。 DPMJET-III模型仅在pT的中间值时预测离子，钾和质子的产率。 HIJING和Sibyll模型仅在高pT下很好地描述了介子的综合产量。 QGSJETII模型预测几乎整个pT范围内的kaon产率。 EPOS1.99和Sibyll模型在 p T 的整个范围内均能很好地预测 K /π比，而EPOS-LHC，HIJING DPMJET和DPMJET模型分别根据差异的增加顺序进行预测不足。 EPOS1.99，EPOS-LHC和Sibyll模型可预测 p T 的低值的 p /π比，但在高值时会过度预测DPMJET-III和HIJING模型在整个 p T 范围内预测不足。尽管这些模型的预测大部分与ALICE的测量结果一致，但是没有一个模型能够完整地描述强子综合产量及其比率的整个分布。

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