English

An Isotensor Dibaryon in the $pp \to pp\pi^+\pi^-$ Reaction?

Nuclear Experiment 2018-08-08 v4 High Energy Physics - Experiment

Abstract

Exclusive measurements of the quasi-free ppppπ+πpp \to pp\pi^+\pi^- reaction have been carried out at WASA@COSY by means of pdpd collisions at TpT_p = 1.2 GeV. Total and differential cross sections have been extracted covering the energy region Tp=1.081.36T_p = 1.08 - 1.36 GeV, which is the region of N(1440)N^*(1440) and Δ(1232)Δ(1232)\Delta(1232)\Delta(1232) resonance excitations. Calculations describing these excitations by tt-channel meson exchange are at variance with the measured differential cross sections and underpredict substantially the experimental total cross section. An isotensor ΔN\Delta N dibaryon resonance with I(JP)=2(1+)I(J^P) = 2(1^+) produced associatedly with a pion is able to overcome these deficiencies.

Keywords

Cite

@article{arxiv.1803.03193,
  title  = {An Isotensor Dibaryon in the $pp \to pp\pi^+\pi^-$ Reaction?},
  author = {P. Adlarson and W. Augustyniak and W. Bardan and M. Bashkanov and F. S. Bergmann and M. Berłowski and A. Bondar and M. Büscher and H. Calén and I. Ciepał and H. Clement and E. Czerwiński and K. Demmich and R. Engels and A. Erven and W. Erven and W. Eyrich and P. Fedorets and K. Föhl and K. Fransson and F. Goldenbaum and A. Goswami and K. Grigoryev and L. Heijkenskjöld and V. Hejny and N. Hüsken and L. Jarczyk and T. Johansson and B. Kamys and G. Kemmerling and A. Khoukaz and O. Khreptak and D. A. Kirillov and S. Kistryn and H. Kleines and B. Kłos and W. Krzemień and P. Kulessa and A. Kupść and K. Lalwani and D. Lersch and B. Lorentz and A. Magiera and P. Marciniewski and B. Mariański and H. --P. Morsch and P. Moskal and H. Ohm and W. Parol and E. Perez del Rio and N. M. Piskunov and D. Prasuhn and D. Pszczel and K. Pysz and J. Ritman and A. Roy and Z. Rudy and O. Rundel and S. Sawant and S. Schadmand and I. Schätti--Ozerianska and T. Sefzick and V. Serdyuk and B. Shwartz and T. Skorodko and M. Skurzok and J. Smyrski and V. Sopov and R. Stassen and J. Stepaniak and E. Stephan and G. Sterzenbach and H. Stockhorst and H. Ströher and A. Szczurek and A. Trzciński and M. Wolke and A. Wrońska and P. Wüstner and A. Yamamoto and J. Zabierowski and M. J. Zieliński and P. Żuprański and M. Żurek},
  journal= {arXiv preprint arXiv:1803.03193},
  year   = {2018}
}

Comments

arXiv admin note: substantial text overlap with arXiv:1803.03192