INVESTIGADORES
GOMEZ DUMM Daniel Alberto
artículos
Título:
An effective field theory approach to the electroweak corrections at LEP energies
Autor/es:
ARIF AKUNDOV; JOSÉ BERNABÉU; DANIEL GOMEZ DUMM; ARCADI SANTAMARIA
Revista:
NUCLEAR PHYSICS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 1999 vol. 563 p. 82 - 96
ISSN:
0550-3213
Resumen:
In the framework of the effective field theory (EFT) we discuss the electroweak (EW) corrections at LEP energies. We obtain the effective Lagrangian in the large m_t limit, and reproduce analytically the dominant EW corrections to the LEP2 processes e+ e- -> gamma Z and e+ e- -> Z Z. To include effects of finite top-quark and Higgs masses, we use the effective Lagrangian at tree level and fit LEP1/SLD observables with four arbitrary parameters, plus alpha_s(m_Z). The EFT approach works remarkably well. Using the effective couplings determined from the fit, and tree-level EFTformulae, we predict the cross sections for e+ e- -> Z Z, gamma Z at a level better than 1 %.
