Formation of a narrow baryon resonance with positive strangeness in K^+ collisions with Xe nuclei
V.V. Barmin, A.E. Asratyan, V.S. Borisov, C. Curceanu, G.V. Davidenko,, A.G. Dolgolenko, C. Guaraldo, M.A. Kubantsev, I.F. Larin, V.A. Matveev, V.A., Shebanov, N.N. Shishov, L.I. Sokolov, G.K. Tumanov, and V.S. Verebryusov, (DIANA Collaboration)
TL;DR
This study confirms the existence of a narrow pK^0 resonance, the ^+ baryon, with precise measurements of its mass and width, based on reanalyzed K^+Xe collision data with increased statistics.
Contribution
The paper provides reinforced evidence for the ^+ baryon resonance with improved statistical significance and precise measurements of its properties, using reanalyzed experimental data.
Findings
Confirmed ^+ baryon resonance near 1538 MeV
Measured the resonance's width as approximately 0.39 MeV
Achieved statistical significance of about 8sigma
Abstract
The data on the charge-exchange reaction K^+Xe --> K^0 p Xe, obtained with the bubble chamber DIANA, are reanalyzed using increased statistics and updated selections. Our previous evidence for formation of a narrow pK^0 resonance with mass near 1538 MeV is confirmed and reinforced. The statistical significance of the signal reaches some 8\sigma (6\sigma) when estimated as S/\sqrt{B} (S/\sqrt{B+S}). The mass and intrinsic width of the \Theta^+ baryon are measured as m = (1538+-2) MeV and \Gamma = (0.39+-0.10) MeV.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.