  A theory is developed for the emission noise at frequency $\nu$ in a quantum
dot in the presence of Coulomb interactions and asymmetric couplings to the
reservoirs. We give an analytical expression for the noise in terms of the
various transmission amplitudes. Including inelastic scattering contribution,
it can be seen as the analog of the Meir-Wingreen formula for the current. A
physical interpretation is given on the basis of the transmission of one
electron-hole pair to the concerned reservoir where it emits an energy after
recombination. We then treat the interactions by solving the self-consistent
equations of motion for the Green functions. The results for the noise
derivative versus $eV$ show a zero value until $eV = h\nu$, followed by a Kondo
peak in the Kondo regime, in good agreement with recent measurements in carbon
nanotube quantum dots.
