Search for narrow resonances inπpelastic scattering from the EPECUR experiment
| Autor: | D. V. Kalinkin, L. I. Koroleva, N. G. Kozlenko, V. M. Nesterov, I. I. Strakovsky, A. B. Gridnev, W. J. Briscoe, A. G. Krivshich, V. S. Kozlov, D. N. Svirida, M. E. Sadler, V. Yu. Trautman, V. A. Andreev, A. D. Sulimov, V. V. Sumachev, V. Kuznetsov, V. V. Ryltsov, I. Bordyuzhin, V. Tarakanov, Ye. A. Filimonov, Ron L. Workman, D. V. Novinsky, B. V. Morozov, I. G. Alekseev, V. V. Golubev |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Physical Review C. 93 |
| ISSN: | 2469-9993 2469-9985 |
| DOI: | 10.1103/physrevc.93.062201 |
| Popis: | The analysis of high-precision ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}p$ cross-sectional data from the EPECUR Collaboration based on the multichannel $K$-matrix approach is presented. The sharp structures seen in these data are studied in terms of both opening thresholds and new resonance contributions. Some prominent features are found to be due to the opening $K\mathrm{\ensuremath{\Sigma}}$ channel. However, a complete description of the data is improved with the addition of two narrow resonant structures at $W\ensuremath{\sim}1.686$ and $W\ensuremath{\sim}1.720\phantom{\rule{4.pt}{0ex}}\mathrm{GeV}$. These structures are interpreted as manifestations of ${S}_{11}$ and ${P}_{11}$ resonances. The underlying nature of the observed phenomena is discussed. |
| Databáze: | OpenAIRE |
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