Kinematical constraints in fermion-antifermion systems

被引：9

作者：

Stoica, S. ^{[1
]}

Lutz, M. F. M. ^{[2
]}

Scholten, O. ^{[1
]}

机构：

[1] Univ Groningen, KVI, NL-9747 AA Groningen, Netherlands

[2] GSI Helmholtzzentrum Schwerionenforschung GmbH, D-64291 Darmstadt, Germany

来源：

PHYSICAL REVIEW D | 2011年 / 84卷 / 12期

关键词：

BETHE-SALPETER APPROACH; DISPERSION-RELATIONS; SCATTERING; AMPLITUDES; SINGULARITIES; PARTICLES; PHOTON;

D O I：

10.1103/PhysRevD.84.125001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the scattering of fermions off antifermions with spin 1/2 and 3/2. Starting from helicity partial-wave scattering amplitudes, we derive transformations that eliminate all kinematical constraints. Such amplitudes are expected to satisfy partial-wave dispersion relations and therefore provide a suitable basis for data analysis and the construction of effective field theories. Our derivation relies on a decomposition of the various scattering amplitudes into suitable sets of invariant functions.

引用

页数：12

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