The pseudorapidity distribution of charged particles produced in p-p collisions at 400GeV/c was measured by using the Lexan bubble chamber films offered by the CERN NA27 collaboration.The scaled factorial cumulant mom...The pseudorapidity distribution of charged particles produced in p-p collisions at 400GeV/c was measured by using the Lexan bubble chamber films offered by the CERN NA27 collaboration.The scaled factorial cumulant moments have been calculated.The results show that the second order cumulants have positive values,while the cumulants of higher order are consistent with zero except for the case with nch≥4 events,where the third-order cumulants have small positive values beyond the statistical uncertainties.From Monte Carlo events with the same single particle spectrum and no correlations,we observed that for broad mixed-multiplicity distributions,a significant part of K2 is coming from the single-particle fluctuation due to the fluctuation multiplicity.展开更多
The pseudorapidity and azimuthal angle distributions for charged particle produced in pp collisions at 400 GeV/c have been measured by using the LEBC films offered by CERN NA27 collaboration.The split-bin correlation ...The pseudorapidity and azimuthal angle distributions for charged particle produced in pp collisions at 400 GeV/c have been measured by using the LEBC films offered by CERN NA27 collaboration.The split-bin correlation functions have been calculated.The results show that the correlations are produced by resonance-like processces.展开更多
基金Supported by the National Natural Science Foundation of China.
文摘The pseudorapidity distribution of charged particles produced in p-p collisions at 400GeV/c was measured by using the Lexan bubble chamber films offered by the CERN NA27 collaboration.The scaled factorial cumulant moments have been calculated.The results show that the second order cumulants have positive values,while the cumulants of higher order are consistent with zero except for the case with nch≥4 events,where the third-order cumulants have small positive values beyond the statistical uncertainties.From Monte Carlo events with the same single particle spectrum and no correlations,we observed that for broad mixed-multiplicity distributions,a significant part of K2 is coming from the single-particle fluctuation due to the fluctuation multiplicity.
基金Supported by the National Natural Science Foundation of China。
文摘The pseudorapidity and azimuthal angle distributions for charged particle produced in pp collisions at 400 GeV/c have been measured by using the LEBC films offered by CERN NA27 collaboration.The split-bin correlation functions have been calculated.The results show that the correlations are produced by resonance-like processces.
