  The observed enhancement of low-kT photons in comparison with incorrect
calculations, should not be treated as a puzzle. The paper by Low considered a
large rapidity gap process of diffractive excitation of a hadron, h ->
h+\gamma, rather than multiple hadron production spanning all over the rapidity
interval between colliding hadrons. The optical theorem connects these two
processes, and what is inner bremsstrahlung, suppressed according to Low,
corresponds to radiation from final state hadrons. Thus, the main result of the
Low theorem, based on gauge invariance of the diffractive bremsstrahlung
amplitude, supplemented with the optical theorem, contradicts the so-called
bremsstrahlung model. The latter has been used for comparison with data,
leading to the longstanding soft photon puzzle.
