Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2014, Vol. 25 ›› Issue (4): 040502 doi: 10.13538/j.1001-8042/nst.25.040502


Hadron Multiplicities in p+p and p+Pb Collisions at the LHC

WANG Hong-Min, HOU Zhao-Yu, SUN Xian-Jing   

  1. 1Physics Department, Academy of Armored Forces Engineering of PLA, Beijing 100072, China
    2Physics Graduate School, Shijiazhuang Railway Institute, Shijiazhuang 050043, China
    3Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • Contact: WANG Hong-Min
  • Supported by:

    Supported by National Natural Science Foundation of China (No. 11247322/A050306) and Natural Science Foundation of Hebei Province (No. A2012210043)

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WANG Hong-Min, HOU Zhao-Yu, SUN Xian-Jing. Hadron Multiplicities in p+p and p+Pb Collisions at the LHC.Nuclear Science and Techniques, 2014, 25(4): 040502     doi: 10.13538/j.1001-8042/nst.25.040502


Experiments at the Large Hadron Collider (LHC) have measured multiplicity distributions in p+p and p+Pb collisions at a new domain of collision energy. Based on considering an energy-dependent broadening of the nucleon’s density distribution, charged hadron multiplicities are studied with the phenomenological saturation model and the evolution equation dependent saturation model. By assuming the saturation scale has a small dependence on the 3-dimensional root mean square (rms) radius at different energy, the theoretical results are in good agreement with the experimental data from CMS and ALICE collaboration. The predictive results in p+p collisions at \sqrt{s} = 14 TeV of the LHC are also given.

Key words: Hadron multiplicities, Negative binominal distribution, Gluon saturation