  We study finite-frequency quantum noise and photon-assisted electron
transport through a wide and ballistic graphene sheet sandwiched between two
metallic leads. The elementary excitations allow as to examine the differences
between effects related to Fabry-P\'erot like interferences and signatures
caused by correlations of coherently scattered particles in electron- and
hole-like parts of the Dirac spectrum. We identify different features in the
current-current auto- and cross-correlation spectra and trace them back to the
interference patterns of the product of transmission- and reflection amplitudes
which define the integrands of the involved correlators. At positive
frequencies the correlator of the auto-terminal noise spectrum with final- and
initial state associated to the measurement terminal is dominant. Phase jumps
occur within the interference patterns of corresponding integrands, which also
reveal the intrinsic energy scale of the two-terminal graphene setup. The
excess noise spectra, as well as the cross-correlation ones, show large
fluctuations between positive and negative values. Oscillatory signatures of
the cross-correlation noise are due to an alternating behavior of the
integrands.
