Details

Autor(en) / Beteiligte

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

Titel

Evidence for an exotic S= -2, Q= -2 baryon resonance in proton-proton collisions at the CERN SPS

Ist Teil von

• Physical review letters, 2004-01, Vol.92 (4), p.042003-042003, Article 042003

Ort / Verlag

United States

Erscheinungsjahr

2004

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• Results of resonance searches in the Xi(-)pi(-), Xi(-)pi(+), Xi;(+)pi(-), and 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/c(2) and width below the detector resolution of about 0.018 GeV/c(2). The significance is estimated to be above 4.2sigma. This state is a candidate for the hypothetical exotic Xi(--)(3/2) baryon with S=-2, I=3 / 2, and a quark content of (dsdsū). 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[-]d). The corresponding antibaryon spectra also show enhancements at the same invariant mass.