Recursive construction of Higgs plus multiparton loop amplitudes:: The last of the "φ-nite" loop amplitudes

被引:44
作者
Berger, Carola F. [1 ]
Del Duca, Vittorio
Dixon, Lance J.
机构
[1] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA
[2] Ist Nazl Fis Nucl, Sezione Torino, I-10125 Turin, Italy
来源
PHYSICAL REVIEW D | 2006年 / 74卷 / 09期
关键词
D O I
10.1103/PhysRevD.74.094021
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We consider a scalar field, such as the Higgs boson H, coupled to gluons via the effective operator H tr G(mu nu)G(mu nu) induced by a heavy-quark loop. We treat H as the real part of a complex field phi which couples to the self-dual part of the gluon field-strength, via the operator phi tr G(SD mu nu)G(SD)(mu nu), whereas the conjugate field phi(dagger) couples to the anti-self-dual part. There are three infinite sequences of amplitudes coupling phi to quarks and gluons that vanish at tree level, and hence are finite at one loop, in the QCD coupling. Using on-shell recursion relations, we find compact expressions for these three sequences of amplitudes and discuss their analytic properties.
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页数:31
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