Isoscalar single-pion production in the region of Roper and d∗(2380) resonances

Adlarson, P.; Augustyniak, W.; Bardan, W.; Bashkanov, M.; Bergmann, F.S.; Berłowski, M.; Bhatt, H.; Bondar, A.; Büscher, M.; Calén, H.; Ciepał, I.; Clement, H.; Czerwiński, E.; Demmich, K.; Engels, R.; Erven, A.; Erven, W.; Eyrich, W.; Fedorets, P.; Föhl, K.; Fransson, K.; Goldenbaum, F.; Goswami, A.; Grigoryev, K.; Gullström, C.-O.; Heijkenskjold, L.; Hejny, V.; Hüsken, N.; Jarczyk, L.; Johansson, T.; Kamys, B.; Kemmerling, G.; Khatri, G.; Khoukaz, A.; Khreptak, O.; Kirillov, D.A.; Kistryn, S.; Kleines, H.; Kłos, Barbara; Krzemień, W.; Kulessa, P.; Kupść, A.; Kuzmin, A.; Lalwani, K.; Lersch, D.; Lorentz, B.; Magiera, A.; Maier, R.; Marciniewski, P.; Mariański, B.; Morsch, H.-P.; Moskal, P.; Ohm, H.; Parol, W.; Perez del Rio, E.; Piskunov, N.M.; Prasuhn, D.; Pszczel, D.; Pysz, K.; Pyszniak, A.; Ritman, J.; Roy, A.; Rudy, Z.; Rundel, O.; Sawant, S.; Schadmand, S.; Schätti-Ozerianska, I.; Sefzick, T.; Serdyuk, V.; Shwartz, B.; Sitterberg, K.; Skorodko, T.; Skurzok, M.; Smyrski, J.; Sopov, V.; Stassen, R.; Stepaniak, J.; Stephan, Elżbieta; Sterzenbach, G.; Stockhorst, H.; Ströher, H.; Szczurek, A.; Trzciński, A.; Varma, R.; Wolke, M.; Wrońska, A.; Wüstner, P.; Yamamoto, A.; Zabierowski, J.; Zieliński, M.J.; Złomańczuk, J.; Żuprański, P.; Żurek, M.

Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12128/3592

Title:	Isoscalar single-pion production in the region of Roper and d∗(2380) resonances
Authors:	Adlarson, P. Augustyniak, W. Bardan, W. Bashkanov, M. Bergmann, F.S. Berłowski, M. Bhatt, H. Bondar, A. Büscher, M. Calén, H. Ciepał, I. Clement, H. Czerwiński, E. Demmich, K. Engels, R. Erven, A. Erven, W. Eyrich, W. Fedorets, P. Föhl, K. Fransson, K. Goldenbaum, F. Goswami, A. Grigoryev, K. Gullström, C.-O. Heijkenskjold, L. Hejny, V. Hüsken, N. Jarczyk, L. Johansson, T. Kamys, B. Kemmerling, G. Khatri, G. Khoukaz, A. Khreptak, O. Kirillov, D.A. Kistryn, S. Kleines, H. Kłos, Barbara Krzemień, W. Kulessa, P. Kupść, A. Kuzmin, A. Lalwani, K. Lersch, D. Lorentz, B. Magiera, A. Maier, R. Marciniewski, P. Mariański, B. Morsch, H.-P. Moskal, P. Ohm, H. Parol, W. Perez del Rio, E. Piskunov, N.M. Prasuhn, D. Pszczel, D. Pysz, K. Pyszniak, A. Ritman, J. Roy, A. Rudy, Z. Rundel, O. Sawant, S. Schadmand, S. Schätti-Ozerianska, I. Sefzick, T. Serdyuk, V. Shwartz, B. Sitterberg, K. Skorodko, T. Skurzok, M. Smyrski, J. Sopov, V. Stassen, R. Stepaniak, J. Stephan, Elżbieta Sterzenbach, G. Stockhorst, H. Ströher, H. Szczurek, A. Trzciński, A. Varma, R. Wolke, M. Wrońska, A. Wüstner, P. Yamamoto, A. Zabierowski, J. Zieliński, M.J. Złomańczuk, J. Żuprański, P. Żurek, M.
Keywords:	Dibaryon resonance; Isoscalar part; Roper resonance; Single-pion
Issue Date:	2017
Citation:	Physics Letters B, Vol. 774 (2017), s. 599-607
Abstract:	Exclusive measurements of the quasi-free pn→ppπ− and pp→ppπ0 reactions have been performed by means of pd collisions at Tp=1.2 GeV using the WASA detector setup at COSY. Total and differential cross sections have been obtained covering the energy region Tp=0.95–1.3 GeV (s=2.3–2.46 GeV), which includes the regions of Δ(1232), N⁎(1440) and d⁎(2380) resonance excitations. From these measurements the isoscalar single-pion production has been extracted, for which data existed so far only below Tp=1 GeV. We observe a substantial increase of this cross section around 1 GeV, which can be related to the Roper resonance N⁎(1440), the strength of which shows up isolated from the Δ resonance in the isoscalar (Nπ)I=0 invariant-mass spectrum. No evidence for a decay of the dibaryon resonance d⁎(2380) into the isoscalar (NNπ)I=0 channel is found. An upper limit of 180 μb (90% C.L.) corresponding to a branching ratio of 9% has been deduced.
URI:	http://hdl.handle.net/20.500.12128/3592
DOI:	10.1016/j.physletb.2017.10.015
ISSN:	0370-2693
Appears in Collections:	Artykuły (WNŚiT)

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