Double Pomeron Exchange and J/ψ, γ Production at High Energy p+p(p) Collisions

  • The hard double diffractive production processes p+p(p)→p+p(p)+J/ψ(γ)+X at high energies are discussed. Under the assumption that gluon distribution with a behavior of l/x at small x in Pomeron is dominant, the dependence of cross section on energy √s is calculated. Comparisons with single diffractive hard process and corresponding non-diffractive Drell-Yang process are made. The present results show that the hard double diffractive processes are similar to single diffractive process, i.e., at extra-high energies the cross section basically increases in a manner of (In S)2. The importance of this discovery for experiments is also pointed out.
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Peng Hongan, Qin Kecheng and He Zhenmin. Double Pomeron Exchange and J/ψ, γ Production at High Energy p+p(p) Collisions[J]. Chinese Physics C, 1995, 19(S1): 51-59.
Peng Hongan, Qin Kecheng and He Zhenmin. Double Pomeron Exchange and J/ψ, γ Production at High Energy p+p(p) Collisions[J]. Chinese Physics C, 1995, 19(S1): 51-59. shu
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Received: 1993-10-04
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    Supported by the National Natural Science Foundation of China Doctoral Foundation of National Education Committee of China, and Natural Science Foundation of Hebei Province.

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Double Pomeron Exchange and J/ψ, γ Production at High Energy p+p(p) Collisions

  • 1 Department of Physics, Peking University, Beijing, China;
  • 2 Department of Physics, Hebei Normal University, Shijiazhuang Hebei, China
Fund Project:  Supported by the National Natural Science Foundation of China Doctoral Foundation of National Education Committee of China, and Natural Science Foundation of Hebei Province.

Abstract: The hard double diffractive production processes p+p(p)→p+p(p)+J/ψ(γ)+X at high energies are discussed. Under the assumption that gluon distribution with a behavior of l/x at small x in Pomeron is dominant, the dependence of cross section on energy √s is calculated. Comparisons with single diffractive hard process and corresponding non-diffractive Drell-Yang process are made. The present results show that the hard double diffractive processes are similar to single diffractive process, i.e., at extra-high energies the cross section basically increases in a manner of (In S)2. The importance of this discovery for experiments is also pointed out.

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