Correlated leading baryon-antibaryon production in e+e- --> ccbar --> Lambda_c+ antiLambda_c- X

We present a study of 649 \pm 35 e+e- --> ccbar events produced at sqrt{s}~10.6 GeV containing both a Lambda_c baryon and a Lambda_c antibaryon. The number observed is roughly four times that expected if the leading charmed hadron types are uncorrelated, confirming an observation by the CLEO Coll...

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Veröffentlicht in:	Physical review. D 2010, Vol.82
Hauptverfasser:	Aubert, B., Karyotakis, Y., Lees, J.P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., Palano, A., Pappagallo, M., Eigen, G., Stugu, B., Sun, L., Battaglia, M., Brown, D.N., Hooberman, B., Kerth, L.T., Kolomensky, Yu. G., Lynch, G., Osipenkov, I.L., Tackmann, K., Tanabe, T., Hawkes, C.M., Soni, N., Watson, A.T., Koch, H., Schroeder, T., Asgeirsson, D.J., Hearty, C., Mattison, T.S., Mckenna, J.A., Barrett, M., Khan, A., Randle-Conde, A., Blinov, V.E., Bukin, A.D., Buzykaev, A.R., Druzhinin, V.P., Golubev, V.B., Onuchin, A.P., Serednyakov, S.I., Skovpen, Yu. I., Solodov, E.P., Todyshev, K. Yu, Bondioli, M., Curry, S., Eschrich, I., Kirkby, D., Lankford, A.J., Lund, P., Mandelkern, M., Martin, E.C., Stoker, D.P., Buchanan, C., Hartfiel, B.L., Atmacan, H., Gary, J.W., Liu, F., Long, O., Vitug, G.M., Yasin, Z., Sharma, V., Campagnari, C., Hong, T.M., Kovalskyi, D., Mazur, M.A., Richman, J.D., Beck, T.W., Eisner, A.M., Heusch, C.A., Kroseberg, J., Lockman, W.S., Martinez, A.J., Schalk, T., Schumm, B.A., Seiden, A., Winstrom, L.O., Cheng, C.H., Doll, D.A., Echenard, B., Fang, F., Hitlin, D.G., Narsky, I., Ongmongkolkul, P., Piatenko, T., Porter, F.C., Andreassen, R., Dubrovin, M.S., Mancinelli, G., Meadows, B.T., Mishra, K., Sokoloff, M.D., Bloom, P.C., Ford, W.T., Gaz, A., Hirschauer, J.F., Nagel, M., Nauenberg, U.
Format:	Artikel
Sprache:	eng
Schlagworte:	High Energy Physics - Experiment Physics
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Zusammenfassung:	We present a study of 649 \pm 35 e+e- --> ccbar events produced at sqrt{s}~10.6 GeV containing both a Lambda_c baryon and a Lambda_c antibaryon. The number observed is roughly four times that expected if the leading charmed hadron types are uncorrelated, confirming an observation by the CLEO Collaboration. We find a 2-jet topology in these events but very few additional baryons, demonstrating that the primary c and cbar are predominantly contained in a correlated baryon-antibaryon system. In addition to the charmed baryons we observe on average 2.6 \pm 0.2 charged intermediate mesons, predominantly pions, carrying 65% of the remaining energy.
ISSN:	2470-0010 2470-0029
DOI:	10.1103/PhysRevD.82.091102