Naslov
Exotic baryon resonances in p+p interactions with the NA49 detector

Autori
Kadija, Krešo

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Journal of Physics G: Nuclear and Particle Physics. 30 / Schroeder, L. - Bristol : Institute od Physics Publishing, 2004, S1359-S1362

Skup
The Seventeenth International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2004)

Mjesto i datum
Oakland (CA), Sjedinjene Američke Države, 11.01.2004. - 17.01.2004

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
pentaquark; exotic; NA49; CERN

Sažetak
A search for baryon resonance states with exotic quantum numbers was performed in p+p interactions at 158 GeV beam energy with the large acceptance NA49 detector at the Cern SPS. A narrow Xi-pi- baryon resonance with mass of 1.862 +/- 0.002 GeV/c2 and width below the detector resolution of 0.018 GeV/c2 ; is observed. This state is identified as a candidate for the hypothesized exotic Xi5-- baryon with S=-2, I=3/2 and a quark content of (ds ds ubar. In the Xi-pi+ invariant mass spectrum at the same mass, an indication is observed of a candidate of the Xi05 ; member of this isospin quartet with a quark content of (ds us dbar). The corresponding antibaryon spectra show indications of enhancements at the same location.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA