On new gauge boson signals according to the littlest higgs model in future e+ e- colliders

• Autor(a) principal: Almeida Jr.,F. M. L. de
• Data de Publicação: 2007
• Outros Autores: Coutinho,Y. A., Martins Simões,J. A., Ramalho,A. J., Wulck,S., Vale,M. A. B. do
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Journal of Physics
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332007000400028
• topic: Littlest Higgs; New Gauge Bosons

There is a recent proposal of identifying the Higgs particle of the Standard Model as a pseudo Nambu-Goldstone boson. This new broken symmetry introduces new particles and new interactions. Among these new interactions a central role to get an experimental signal of a new physics is played by the new neutral gauge bosons, A H and Z H. We study the associated production of general new neutral gauge boson Z¢ and a hard photon in the process e+ + e- <FONT FACE=Symbol>® m</FONT> + + µ- + gamma. For M AH < <FONT FACE=Symbol>Ö</FONT>S we show that the hard photon energy distribution in e+ + e- <FONT FACE=Symbol>® g</FONT> + f + f can present a model dependence and establish the theoretical origin of a new possible heavy neutral gauge boson.