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We have carried out a high-resolution search (σ = 1.5 MeV) for narrow exotic resonances (Γ < 10 MeV) in the mass range M ≈ 1500 − 1850 MeV in ep → e K + X, ep → e K − X and ep → e π + X electroproduction at forward angles (θ CM ≈ 6 − 7 • ). Such narrow resonances would be candidates for partner states of the speculative Θ + (1540) pentaquark. The experiment employed a 5 GeV CW electron beam incident on a liquid hydrogen target and two high-resolution magnetic spectrometers covering a totaldoi:10.1063/1.2176497 fatcat:eamo3uhjsnfpzmzxxtxj5xxavm