Effect of both Z and Z'-mediated flavor-changing neutral currents on the baryonic rare decay $lambda_b$ decays into $lambda l^+l^- $

Details Effect of both Z and Z'-mediated flavor-changing neutral currents on the baryonic rare decay $lambda_b$ decays into $lambda l^+l^- $ Effect of both Z and Z'-mediated flavor-changing neutral currents on the baryonic rare decay $lambda_b$ decays into $lambda l^+l^- $

2011-12-20

arxiv.org/abs/1112.4563v1

International Journal of Modern Physics A, Vol.24, pp. 6223 - 6235 (2009)

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages

Scientific paper

We study the effect of both Z and Z'-mediated flavor-changing neutral currents (FCNCs) on the $ lambda_b arrow lambda l^+l^- (l = mu, tau) $ rare decay. We find the branching ratio is reasonably enhanced from its standard model value due to the effect of both Z and Z'-mediated FCNCs, and gives the possibility of new physics beyond the standard model. The contribution of Z'-boson depends upon the precise value of the mass of Z' boson.

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