Next-to-leading-order perturbative-QCD predictions for γγ→M+M- (M=π,K)

被引：12
作者：
Duplancic, Goran [1 ]
Nizic, Bene [1 ]
机构：
[1] Rudjer Boskovic Inst, Div Theoret Phys, HR-10002 Zagreb, Croatia
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 14期
关键词：
D O I：
10.1103/PhysRevLett.97.142003
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report the first complete leading-twist next-to-leading-order perturbative-QCD predictions for the two-photon exclusive channels gamma gamma -> M+M- (M=pi,K) at large momentum transfer. The asymptotic distribution amplitude is utilized as a candidate form for the nonperturbative dynamical input. Comparison of the obtained results with the existing experimental data does not provide sufficiently clear evidence to support the applicability of the hard-scattering approach at currently accessible energies.
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