Evidence for an Exotic S = - 2, Q = - 2 Baryon Resonance in Proton-Proton Collisions at the CERN SPS

C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Bialkowska, A. Billmeier, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, R. Brun, P. Bunčić, V. Cerny, P. Christakoglou, O. Chvala, J. G. Cramer, P. CsatóN. Darmenov, A. Dimitrov, P. Dinkelaker, V. Eckardt, G. Farantatos, P. Filip, D. Flierl, Z. Fodor, P. Foka, P. Freund, V. Friese, J. Gál, M. Gaździcki, G. Georgopoulos, E. Gladysz, S. Hegyi, C. Höhne, K. Kadija, A. Karev, S. Kniege, V. I. Kolesnikov, T. Kollegger, R. Korus, M. Kowalski, I. Kraus, M. Kreps, M. van Leeuwen, P. Lévai, L. Litov, M. Makariev, A. I. Malakhov, C. Markert, M. Mateev, B. W. Mayes, G. L. Melkumov, C. Meurer, A. Mischke, M. Mitrovski, J. Molnár, St Mrówczyński, G. Pálla, A. D. Panagiotou, D. Panayotov, K. Perl, A. Petridis, M. Pikna, L. Pinsky, F. Pühlhofer, J. G. Reid, R. Renfordt, W. Retyk, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, H. Sann, N. Schmitz, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, G. Stefanek, R. Stock, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, T. A. Trainor, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, A. Wetzler, Z. Wlodarczyk, I. K. Yoo, J. Zaranek, J. Zimányi

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Abstract

A search for the ξ3/2-- and ξ 3/20 states and their antiparticles in proton-proton collisions at √s=17.2 GeV was presented. The interactions were produced with a beam of 158 GeV/c protons on a cylindrical liquid hydrogen target of 20 cm length and 2 cm transverse diameter. The trigger used beam counters in front of the target, together with an anticoncidence counter further downstream. The results provide the first evidence for the existence of a narrow baryon resonance in the ξ-π- invariant mass spectrum with a mass of 1.862±0.0002 GeV/c2, and a width below the detector resolution of about 0.018 GeV/c2.

Original languageEnglish
Article number042003
Pages (from-to)420031-420035
Number of pages5
JournalPhysical review letters
Volume92
Issue number4
Publication statusPublished - Jan 30 2004

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Alt, C., Anticic, T., Baatar, B., Barna, D., Bartke, J., Betev, L., Bialkowska, H., Billmeier, A., Blume, C., Boimska, B., Botje, M., Bracinik, J., Bramm, R., Brun, R., Bunčić, P., Cerny, V., Christakoglou, P., Chvala, O., Cramer, J. G., ... Zimányi, J. (2004). Evidence for an Exotic S = - 2, Q = - 2 Baryon Resonance in Proton-Proton Collisions at the CERN SPS. Physical review letters, 92(4), 420031-420035. [042003].