Hadron production models’ prediction for pT distribution of charged hadrons in pp interactions at 7 TeV

• Published in: Scientific reports 2019-08, Vol.9 (1), p.11811-11811, Article 11811
• Main Authors: Ullah, S., Ajaz, M., Wazir, Z., Ali, Y., Khan, K. H., Younis, H.
• Format: Article
• Language: English
• Subjects: 639/766/419/1132; 639/766/419/1133; Humanities and Social Sciences; multidisciplinary; Science; Science (multidisciplinary)
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-019-48272-4

The yield of transverse momentum ( p T ) 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 p T 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 p T only. The DPMJET-III model predicts the yield of pions, kaons and protons only at intermediate value of p T . The HIJING and Sibyll models describe the integrated yield of pion well at high p T only. The QGSJETII model predicts the yield of kaon for almost the whole p T range. EPOS1.99 and Sibyll models reproduce excellent prediction of the K /π ratio over the entire range of p T 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 p T , but overpredict at high values, while the DPMJET-III and HIJING models underpredict over the entire range of p T . 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.