Bottom Production in π − -Be Collisions at 515 GeV/ c
1995; American Physical Society; Volume: 74; Issue: 4 Linguagem: Inglês
10.1103/physrevlett.74.495
ISSN1092-0145
AutoresR. Jesik, V. Abramov, Yu.M. Antipov, B. Baldin, R.R. Crittenden, L. Dauwe, C. L. Davis, S. P. Denisov, A. Dyshkant, A. Dzierba, V. Yu. Glebov, Haim Goldberg, A. Gribushin, V. Koreshev, J. Krider, A. N. Krinitsyn, R. Li, S. Margulies, T. Marshall, J.P. Martin, H. Méndez, A. Petrukhin, V. Sirotenko, P. Smith, J. Solomon, T. Sulanke, R.M. Sulyaev, F. Vaca, A. Ziemiński, S. Blusk, C. Bromberg, P. Chang, B. C. Choudhary, W. H. Chung, L. de Barbaro, W. Długosz, J. Dunlea, E. Engels, G. Fanourakis, G. Ginther, K. Hartman, J. Huston, V. Kapoor, C. Lirakis, F. Lobkowicz, S. Mani, J. Mansour, A. Maul, Robert F. Miller, B.Y. Oh, E. Pothier, R. Roser, P. F. Shepard, D. Skow, P. Slattery, L. Sorrell, W.S. Toothacker, N. Varelas, D. Weerasundara, J. Whitmore, C. Yosef, M. Zieliński,
Tópico(s)Superconducting Materials and Applications
ResumoWe report on a sample of $\frac{J}{\ensuremath{\psi}}$ mesons coming from secondary vertices, a characteristic of heavyquark decay, detected in the Fermilab Meson West spectrometer. Based on eight signal events in which a $\frac{J}{\ensuremath{\psi}}$ emerges from a secondary vertex occurring in an air-gap region, we obtain an inclusive $b\overline{b}$ cross section of 75 \ifmmode\pm\else\textpm\fi{} 31 \ifmmode\pm\else\textpm\fi{} 26 nb/nucleon. This result is compared to recent QCD predictions. We have also observed several events in the exclusive decay modes ${B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}\frac{J}{\ensuremath{\psi}}+{K}^{\ifmmode\pm\else\textpm\fi{}}$ and ${B}^{0}\ensuremath{\rightarrow}\frac{J}{\ensuremath{\psi}}+{K}^{0*}$ in which the $B$ mass is fully reconstructed.
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