Muon pairs and upper limit for upsilon production by 280 GeV muons

• Published in: Nuclear physics. B 1982-01, Vol.199 (1), p.27-35
• Main Authors: Bollini, D., Frabetti, P.L., Heiman, G., Monari, L., Navarria, F.L., Benvenuti, A.C., Bozzo, M., Brun, R., Gennow, H., Goossens, M., Kopp, R., Navach, F., Piemontese, L., Schinzel, D., Baranov, S.P., Bardin, D.Yu, Gagunashvili, N.D., Golutvin, I.A., Grushin, V.F., Kiryushin, Y.T., Komar, A.A., Krivokhizhin, V.G., Kukhtin, V.V., Savin, I.A., Shikanjan, A.A., Shafranova, M.G., Strachota, J., Volodko, A.G., Telyukov, E.V., Jamnik, D., Meyer-Berkhout, U., Staude, A., Teichert, K., Tirler, R., Voss, R., Zupančič, Č., Feltesse, J., Maillard, J., Malasoma, J.M., Milsztajn, A., Renardy, J.F., Sacquin, Y., Smadja, G., Verrecchia, P., Virchaux, M.
• Format: Article
• Language: English
• ISSN: 0550-3213; 1873-1562
• DOI: 10.1016/0550-3213(82)90564-8

The high mass μ + μ − pairs produced by 280 GeV μ + on a carbon target are studied in a search for the Y production. The high mass continuum in the region 2–18 GeV is interpreted in terms of QED pair production and of μ pairs originating from the decay of hidden and open charm particles as well as of hadrons ( π, K) from deep inelastic interactions. The upper limit for the upsilon production by muons is found to be, at the 90% confidence level, σ γ·(γ→μ +μ −)