| Autor: |
Alt, C., Antičić, Tome, Baatar, B., Barna, D., Bartke, J., Betev, L., Biakowska, H., Billimeier, A., Blume, C., Boimska, B., Botje, M., Bracinik, J., Bramm, R., Brun, R., Buncic, P., Cerny, V., Christakoglou, P., Chvala, O., Cramer, J.G., Csato, P., Darmenov, N., Dimitrov, A., Dinkelaker, P., Eckardt, V., Farantatos, G., Filip, P., Flierl, D., Fodor, Z., Foka, P., Freund, P., Friese, V., Gal, J., Gazdzicki, M., Georgopoulos, G., Gladysz, E., Hegyi, S., Hohne, C., Kadija, Krešo, Karev, A., Kniege, S., Kolesnikov, V.I., Kollegger, T., Korus, R., Kowalski, M., Kraus, I., Kreps, M., Levai, P., Litov, L., Makariev, M., Malakhov, A.I., Markert, C., Mateev, M., Mayes, B.W., Melkumov, G.L., Meurer, C., Mischke, A., Mitrovski, M., Molnar, J., Palla, G., Panagiotou, A.D., Panayotov, D., Perl, K., Petridis, A., Pikna, M., Pinsky, L., Puhlhofer, F., Reid, J.G., Renfordt, R., Retyk, W., Roland, C., Roland, G., Rybczynski, M., Rybicki, A., Sandoval, A., Sann, H., Schmitz, N., Seyboth, P., Sikler, F., Sitar, B., Skrzypczak, E., Stefanek, G., Stock, R., Strobele, H., Šuša, Tatjana, Szentpetery, I., Sziklai, J., Trainor, T.A., Varga, D., Vassiliou, M., Veres, G.I., Vesztergombi, G., Vranic, D., Wetzler, A., Wodarczyk, Z., Yoo, I.K., Zaranek, J., Zimanyi, J. |
| Jazyk: |
chorvatština |
| Rok vydání: |
2004 |
| Předmět: |
|
| Zdroj: |
Physical Review Letters |
| Popis: |
Results of resonance searches in the Xi-pi-, Xi-pi+, bar{; ; ; ; Xi}; ; ; ; +pi-, and bar{; ; ; ; Xi}; ; ; ; +pi+ invariant mass spectra in proton-proton collisions at sqrt{; ; ; ; s}; ; ; ; = 17.2 GeV are presented. Evidence is shown for the existence of a narrow Xi-pi- baryon resonance with mass of 1.862± ; ; 0.002 GeV/c2 and width below the detector resolution of about 0.018 GeV/c2. The significance is estimated to be above 4.2. This state is a candidate for the hypothetical exotic Xi^{; ; ; ; --}; ; ; ; _{; ; ; ; ; ; 3/2}; ; ; ; baryon with S = -2, I = 3/2, and a quark content of (dsds\bar{; ; ; ; u}; ; ; ; ). At the same mass, a peak is observed in the \Xi^{; ; ; ; -}; ; ; ; \pi^{; ; ; ; +}; ; ; ; spectrum which is a candidate for the \Xi^{; ; ; ; 0}; ; ; ; _{; ; ; ; 3/2}; ; ; ; member of this isospin quartet with a quark content of (dsus\bar{; ; ; ; d}; ; ; ; ). The corresponding antibaryon spectra also show enhancements at the same invariant mass. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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