Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays

Observation of a Single-Spin Azimuthal Asymmetry in Semi-Inclusive Pion Electro-Production

Observation of a Structure in $pp \to ppγγ$ near the $ππ$ Threshold and its Possible Interpretation by $γγ$ Radiation from Chiral Loops in the Mesonic $σ$ Channel

Observation of a threshold enhancement in the p \bar{Lambda} invariant mass spectrum

Observation of an Anisotropy in the Galactic Cosmic Ray arrival direction at 400 TeV with IceCube

Observation of an Anomalous Number of Dimuon Events in a High Energy Neutrino Beam

Observation of an enhancement in $e^+e^- \to Υ(1S)π^+ π^-$, $Υ(2S)π^+ π^-$, and $Υ(3S)π^+ π^-$ production around $\sqrt{s}=10.89$ GeV at Belle

Observation of an enhancement in e+e- to Upsilon(1S)pi+pi-, Upsilon(2S)pi+pi-, and Upsilon(3S)pi+pi- production near sqrt{s}=10.89 GeV at Belle

Observation of an Excess in the Search for the Standard Model Higgs Boson at ALEPH

Observation of an Excited Charm Baryon OmegaC* Decaying to OmegaC0 Gamma

Observation of an excited Xi(b) baryon

Observation of an Exotic $S=+1$ Baryon in Exclusive Photoproduction from the Deuteron

Observation of an Exotic Baryon with S=+1 in Photoproduction from the Proton

Observation of an Exotic S = -2, Q = -2 Baryon Resonance in Proton-Proton Collisions at the CERN SPS

Observation of an Isotriplet of Excited Charmed Baryons Decaying to $Λ_c^+ π$

Observation of Anisotropic Event Shapes and Transverse Flow in Au+Au Collisions at AGS Energy

Observation of Anomalous Dimuon Events in the NuTeV Decay Detector

Observation of anomalous Upsilon(1S)pi+pi- and Upsilon(2S)pi+pi- production near the Upsilon(5S) resonance

Observation of Atmospheric Neutrino Oscillations in Soudan 2

Observation of b --> d gamma and Determination of |V_td/V_ts|