We report the first observation of a charm-strange meson D_sJ(2632) at a mass
of 2632.5+/-1.7 MeV/c^2 in data from SELEX, the charm hadro-production
experiment E781 at Fermilab. This state is seen in two decay modes, D_s eta and
D^0 K^+. In the D_s eta decay mode we observe a peak with 101 events over a
combinatoric background of 54.9 events at a mass of 2635.4+/-3.3 MeV/c^2. There
is a corresponding peak of 21 events over a background of 6.9 at 2631.5+/-2.0
MeV/c^2 in the decay mode D^0 K^+. The relative branching ratio Gamma(D^0
K^+)/\Gamma(D_s eta) is 0.14+/-0.06. The full version of this paper has been
accepted for publication in PRL (hep-ex/0406045). Here I have reproduced only
the mass difference signal plots for the D_s eta and D^0 K^+ decay modes.Comment: 2 pages, 2 figures, to be published in the proceedings of "XXIV
Physics in Collision", Boston, June 200