A CLEAR TEST OF α<SUB>s</SUB> IN QCD AT ISR ENERGIES

LUO Ma; KONG Fan-Mei; LIU Hao-Ran

Chinese Physics C> 1985, Vol. 9> Issue(6) : 669-678

A CLEAR TEST OF α_s IN QCD AT ISR ENERGIES

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Abstract：
We calculate the cross-section differences:
(a) dσ(pp→Jet_大PT+γ_大PT+X)-dσ(pp→Jet_大PT+γ_大PT+X)
(b) dσ(pp→2_^γ大PT+X)-dσ(pp→2_^γ大PT+X)
(c) dσ(K^-p→Jet_大PT+γ_大PT+X)-dσ(K⁺p→Jet_大PT+γ_大PT+X)
(d) dσ(K^-p→2γ_大PT+X)-dσ(K⁺p→2_γ大PT+X)
(e) dσ(pp→2Jet_大PT+X)-dσ(pp→2Jet_大PT+X)
and find that they are not affected by gluon and sea-quark distribution functions and various fragmentation functions. Comparing these results with the corresponding expe rimental data, one can accurately determine the ratio α_s/α under the present experimental conditions.

References

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A. ALI, Phys. Lett., 11OB (1982), 67,[1] Kwang Sup Soh, Pong You1 Pac, H. W. Lee, and J. B. Choi, Phys. Rev., Dl8 (1978), 751.[3] M. FONTANNAZ, A. MANTRACH, B. PIRE and D. SCHIFF, Phys. Lett., 89B (1980), 263; M.Anselmino and E. Leader, Z. Phys., C18 (1983), 307; 孔繁梅、罗马、刘浩然, 《高能物理与核物理》(待发表)。[4] D. I. Sivers et al., Phys. Rep., 23 (19761, 1.[5] J. G. H. de Groot et al., Phys. Lett., 82B (1979), 456.[6] H. Abramowia et' al., Preprint CERN-EP/82-210.[7] A. J. Buras and K. J. P. Gaemers, Nucl. Phys., B132 (1978), 249.[8] T. Akson et al., Phys. Lett., 123B (1983), 133.[9] T. Akson et al., Preprint CERN-EP/83-75; UA5 Collaboration, Physica Scripta 23 (1981), 642.[10] J. Lefrancois, High Energy Physics-1980 (XX International conference, Madison, Wisconsin) 1319.

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LUO Ma, KONG Fan-Mei and LIU Hao-Ran. A CLEAR TEST OF α_s IN QCD AT ISR ENERGIES[J]. Chinese Physics C, 1985, 9(6): 669-678.

LUO Ma, KONG Fan-Mei and LIU Hao-Ran. A CLEAR TEST OF α_s IN QCD AT ISR ENERGIES[J]. Chinese Physics C, 1985, 9(6): 669-678. 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

A CLEAR TEST OF α_s IN QCD AT ISR ENERGIES

Corresponding author: LUO Ma,

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1985-12-05

Abstract:

We calculate the cross-section differences:
(a) dσ(pp→Jet_大PT+γ_大PT+X)-dσ(pp→Jet_大PT+γ_大PT+X)
(b) dσ(pp→2_^γ大PT+X)-dσ(pp→2_^γ大PT+X)
(c) dσ(K^-p→Jet_大PT+γ_大PT+X)-dσ(K⁺p→Jet_大PT+γ_大PT+X)
(d) dσ(K^-p→2γ_大PT+X)-dσ(K⁺p→2_γ大PT+X)
(e) dσ(pp→2Jet_大PT+X)-dσ(pp→2Jet_大PT+X)
and find that they are not affected by gluon and sea-quark distribution functions and various fragmentation functions. Comparing these results with the corresponding expe rimental data, one can accurately determine the ratio α_s/α under the present experimental conditions.