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New limits on D0 (1.865) production in proton-nucleus collisions at 400 GeV/c |
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| Authors: | WR Ditzler DA Finley OE Johnson FJ Loeffler EI Shibata CW Akerlof P Alley R Fabrizio P Kraushaar D Koltick DI Meyer R Thun D Bintinger RL Loveless RA Lundy KC Stanfield DD Yovanovitch |
| Institution: | Purdue University, West Lafayette, Indiana 47907, USA;University of Michigan, Ann Arbor, Michigan 48109, USA;Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA |
| Abstract: | We present final results of a sensitive search for new particles in π±K? effective mass spectra observed in proton-nucleus collisions at 400 GeV/c. We establish a limit for D0 (1.865) production Bπ+π? dσ/dy < 360 nb/nucleon at ycm≈ ?0.4. For D?0 → π?K+ the limit is 290 nb/nucleon. |
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