Naslov
Search for exotic baryon resonances in p+p collisions at the CERN SPS

Autori
Šuša, Tatjana

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

Izvornik
Proceedings of the XXXIXth Rencontres de Moriond: 2004 QCD and High Energy Hadronic Interactions / Auge, Etienne ; Tran Thanh Van, Jean - : The Gioi, 2004, 19-22

Skup
The XXXIXth Rencontres de Moriond, QCD AND HIGH ENERGY HADRONIC INTERACTIONS

Mjesto i datum
La Thuile, Italija, 28.03.2004. - 04.04.2004

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
pentaquark; exotic; baryons; NA49

Sažetak
The results of resonance searches in $\Xi^{; ; ; -}; ; ; \pi^{; ; ; -}; ; ; $, $\Xi^{; ; ; -}; ; ; \pi^{; ; ; +}; ; ; $, $\overline{; ; ; \Xi}; ; ; ^{; ; ; +}; ; ; \pi^{; ; ; -}; ; ; $ and $\overline{; ; ; \Xi}; ; ; ^{; ; ; +}; ; ; \pi^{; ; ; +}; ; ; $ invariant mass spectra in proton-proton collisions at $\sqrt{; ; ; s}; ; ; =$17.2~GeV are presented. A narrow state was observed in $\Xi^{; ; ; -}; ; ; \pi^{; ; ; -}; ; ; $ spectra with mass of 1.862 $\pm$ 0.002 GeV/$c^{; ; ; 2}; ; ; $ and width below the detector resolution of about 0.018 GeV/$c^{; ; ; 2}; ; ; $. This state is identified as a candidate for the hypothesized exotic $\Xi_{; ; ; 5}; ; ; ^{; ; ; --}; ; ; $ baryon with S = $-2$, I = $\frac{; ; ; 3}; ; ; {; ; ; 2}; ; ; $ and a quark content of ($dsds\bar{; ; ; u}; ; ; $). $\Xi^{; ; ; -}; ; ; \pi^{; ; ; +}; ; ; $ and the corresponding antiparticle spectra show an indication of enhancements at the same mass.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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