Search for an exotic S=-2, Q=-2 baryon resonance in proton-proton interactions at sNN =17.3 GeV

NA61 SHINE Collaboration, G. A. Feofilov, S. N. Igolkin, V. N. Kovalenko, T. V. Lazareva, A. O. Merzlaya, D. S. Prokhorova, F. F. Valiev, V. V. Vechernin, A. Yu. Seryakov

Результат исследований: Научные публикации в периодических изданияхстатья

Аннотация

Pentaquark states have been extensively investigated theoretically in the context of the constituent quark model. In this paper results of an experimental search for pentaquarks in the Ξ-π-, Ξ-π+, Ξ+ π- A nd Ξ+ π+ invariant mass spectra in proton-proton interactions at s=17.3 GeV are presented. Previous possible evidence from the NA49 collaboration of the existence of a narrow Ξ-π-baryon resonance in p+p interactions is not confirmed with almost 10 times greater event statistics. The search was performed using the NA61/SHINE detector which reuses the main components of the NA49 apparatus. No signal was observed with either the selection cuts of NA49 or newly optimized cuts.

Язык оригиналаанглийский
Номер статьи051101
ЖурналPhysical Review D
Том101
Номер выпуска5
DOI
СостояниеОпубликовано - 1 мар 2020

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  • Физика и астрономия (разное)

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