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25 October 2021
 
  » arxiv » 1604.2379

 Article overview


Search for narrow resonances in $pi p$ elastic scattering from the EPECUR experiment
A. Gridnev ; I.G. Alekseev ; V.A. Andreev ; I.G. Bordyuzhin ; W.J. Briscoe ; Ye.A. Filimonov ; V.V. Golubev ; D.V. Kalinkin ; L.I. Koroleva ; N.G. Kozlenko ; V.S. Kozlov ; A.G. Krivshich ; V.A. Kuznetsov ; B.V. Morozov ; V.M. Nesterov ; D.V. Novinsky ; V.V. Ryltsov ; M. Sadler ; I.I. Strakovsky ; A.D. Sulimov ; V.V. Sumachev ; D.N. Svirida ; V.I. Tarakanov ; V.Yu. Trautman ; R.L. Workman ;
Date 8 Apr 2016
AbstractThe analysis of high-precision $pi^{pm}p o pi^{pm}p$ cross section 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 $KSigma$ channel. However, a complete description of the data is improved with the addition of two narrow resonant structures at $Wsim 1.686$ and $Wsim 1.720$ GeV. These structures are interpreted as manifestations of $S_{11}$ and $P_{11}$ resonances. The underlying nature of the observed phenomena is discussed.
Source arXiv, 1604.2379
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