Contribution parallel talk
Excitation of $d^{\ast}(2380)$ dibaryon in the coherent $pd \rightarrow pd\pi\pi$ channel at ANKE
Speakers
- Dmitry TSIRKOV
Primary authors
- Dr. Vladimir KOMAROV (JINR)
- Dmitry TSIRKOV (JINR)
Co-authors
- Mrs. Tatiana AZARYAN (JINR)
- Dr. Sergey DYMOV (FZ Juelich)
- Mrs. Ainur KUNSAFINA (JINR)
- Mr. Zhanibek KURMANALIYEV (JINR)
- Dr. Yury UZIKOV (JINR)
Files
Collaboration
ANKE
Abstract content
The reaction $p + d \rightarrow p + d + X$ was studied at 0.8--2.0 GeV proton beam energies with the ANKE magnetic spectrometer at the COSY synchrotron storage ring. The proton-deuteron pairs emerging with high momenta, 0.6--1.8 GeV/$c$, were detected at small angles with respect to the proton beam. Distribution above the reaction missing mass $M_{x}$ reveals a local enhancement near the threshold of the pion pair production specific to the so-called ABC effect. The enhancement has a structure of a narrow bump placed above a smooth continuum. The invariant mass of the $d\pi\pi$ system in this enhancement region exhibits a resonance-like peak at ${M}_{d\pi\pi}\approx 2.36$ GeV/$c^2$ with the width $\Gamma\approx0.10$ GeV/$c^2$, corresponding to the excitation of the $d^{\ast}(2380)$ dibaryon resonance. A possible interpretation of these features is discussed.