RAPIDITY CORRELATION OF FORWARD-BACKWARD MULTIPLICITIES

XIE Yi-Gang

Chinese Physics C> 1985, Vol. 9> Issue(5) : 520-525

RAPIDITY CORRELATION OF FORWARD-BACKWARD MULTIPLICITIES

XIE Yi-Gang ^,

Institute of High Energy Physics, Academia Sinica

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Abstract：
The correlation of forward-backward multiplicities about 9×10⁴ events under minimum-bias trigger condition of UA-1 experiment on 540 GeV proton antiproton collider at CERN is reported. Different cut-off condition and different acceptance correction methods of UA-1 central detector are selected in order to obtain flater rapidity distribution. The correlation strength of short, long, full, and fragmentation range is given. Correlation between regions which are symmetrical and unsymmetrical to the plane with axial angle θ=90° is discussed. The correlation strength in short range forward-backward regions with equal charge is compared with that of opposite charge. All results are compared with other works and with some theoretical models.

References

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S. Nussinov and C. Quigg, Phys. Rev., D6(1972), 2713.[2] T. Kafka et al., Phys. Rev Lett., 34, 11(1975), 687.[3] S. Uligetal., Nucl. Phys., B132(1978), 15.[4] G. Ekspong, UA-5 Report, Third Topical Workshop on Proton-Antiproton Collider Physics, (Rema, Jan. 1983); Eckart, UA-5 Report Recontre de Moriond of pp Physics, Mar., 1983.[5] 谢一冈, 物理, 10(1934), 577.[6] Dennis Siver et al., Phys. Rev., D9('1974), 208.[7] R. Gottgen CERN/EP 81-67 July (1981 j.[8] M. Calvetti, Third Topical Workshop on Proton-Antiproton Collider Physics Roma Jan, 1983.[9] M. Pimia, J. P. Revol, S. Sadoulet, Y. G. Xie UA-1/TN83-20, Note on Acceptance of UA-1 Central Detector Apr. 1983.[10] Drijard et al., Nucl. Phys., B155 (1979), 269.[11] L. Foa, Phys. Reports, 22, No. 1(1975), 1.[12] F. W. Bopp SI-82-14 (Report of Siegen University, Germany) 1982.[13] R. Bck, Note of UA-1 on Lectureat Wien (1982).[14] K. Eggert et al., Nucl. Phys., B86(1975), 202.

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XIE Yi-Gang. RAPIDITY CORRELATION OF FORWARD-BACKWARD MULTIPLICITIES[J]. Chinese Physics C, 1985, 9(5): 520-525.

XIE Yi-Gang. RAPIDITY CORRELATION OF FORWARD-BACKWARD MULTIPLICITIES[J]. Chinese Physics C, 1985, 9(5): 520-525. shu

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

RAPIDITY CORRELATION OF FORWARD-BACKWARD MULTIPLICITIES

XIE Yi-Gang ^,

Corresponding author: XIE Yi-Gang,

Institute of High Energy Physics, Academia Sinica

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1985-10-05

Abstract: The correlation of forward-backward multiplicities about 9×10⁴ events under minimum-bias trigger condition of UA-1 experiment on 540 GeV proton antiproton collider at CERN is reported. Different cut-off condition and different acceptance correction methods of UA-1 central detector are selected in order to obtain flater rapidity distribution. The correlation strength of short, long, full, and fragmentation range is given. Correlation between regions which are symmetrical and unsymmetrical to the plane with axial angle θ=90° is discussed. The correlation strength in short range forward-backward regions with equal charge is compared with that of opposite charge. All results are compared with other works and with some theoretical models.