Formation of the χ 1 and χ 2 charmonium resonances in antiproton-proton annihilation and measurements of their masses and total widths

In an experiment performed at the CERN-ISR the direct formation is observed of the χ 1 and χ 2 charmonium states in proton-antiproton annihiliation. A novel technique provided excellent energy resolution together with small background and reduced systematics. The following values for the masses and...

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Bibliographic Details
Published in:Physics letters. B 1986, Vol.172 (3), p.455-460
Main Authors: Baglin, C., Baird, S., Bassompierre, G., Borreani, G., Brient, J.-C., Broll, C., Brom, J.-M., Bugge, L., Buran, T., Bruq, J.-P., Bussière, A., Buzzo, A., Cester, R., Chemarin, M., Chevallier, M., Escoubes, B., Fay, J., Ferroni, S., Gracco, V., Guillaud, J.-P., Khan-Aronsen, E., Kirsebom, K., Kylling, A., Ille, B., Lambert, M., Leistam, L., Lundby, A., Macri, M., Marchetto, F., Menichetti, E., Mörch, Ch, Mouellic, B., Olsen, D., Pastrone, N., Petrillo, L., Pia, M.G., Poole, J., Poulet, M., Rinaudo, G., Santroni, A., Severi, M., Skjevling, G., Stugu, B.
Format: Article
Language:English
Subjects:
High Energy Physics - Phenomenology
Physics
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Summary:In an experiment performed at the CERN-ISR the direct formation is observed of the χ 1 and χ 2 charmonium states in proton-antiproton annihiliation. A novel technique provided excellent energy resolution together with small background and reduced systematics. The following values for the masses and total widths of the states were obtained: Λ χ 1
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(86)90289-3