Measurement of the ω → π+π−π0 Dalitz plot distribution : The WASA-at-COSY Collaboration

Adlarson, Patrik; Augustyniak, W.; Bardan, W.; Bashkanov, M.; Bergmann, F. S.; Berlowski, M.; Bhatt, H.; Bondar, A.; Buescher, M.; Calén, Hans; Ciepal, I.; Clement, H.; Czerwinski, E.; Demmich, K.; Engels, R.; Erven, A.; Erven, W.; Eyrich, W.; Fedorets, P.; Foehl, K.; Fransson, Kjell; Goldenbaum, F.; Goswami, A.; Grigoryev, K.; Gullström, Carl-Oscar; Heijkenskjöld, Lena; Hejny, V.; Huesken, N.; Jarczyk, L.; Johansson, Tord; Kamys, B.; Kemmerling, G.; Khan, F. A.; Khatri, G.; Khoukaz, A.; Khreptak, O.; Kirillov, D. A.; Kistryn, S.; Kleines, H.; Klos, B.; Krzemien, W.; Kulessa, P.; Kupsc, Andrzej; Kuzmin, A.; Lalwani, K.; Lersch, D.; Lorentz, B.; Magiera, A.; Maier, R.; Marcinievski, Pawel; Marianski, B.; Morsch, H. -P; Moskal, P.; Ohm, H.; del Rio, E. Perez; Piskunov, N. M.; Prasuhn, D.; Pszczel, D.; Pysz, K.; Pyszniak, Andrzej; Ritman, J.; Roy, A.; Rudy, Z.; Rundel, O.; Sawant, S.; Schadmand, S.; Schatti-Ozerianska, I.; Sefzick, T.; Serdyuk, V.; Shwartz, B.; Sitterberg, K.; Skorodko, T.; Skurzok, M.; Smyrski, J.; Sopov, V.; Stassen, R.; Stepaniak, J.; Stephan, E.; Sterzenbach, G.; Stockhorst, H.; Stroeher, H.; Szczurek, A.; Trzcinski, A.; Varma, R.; Wolke, Magnus; Wronska, A.; Wuestner, P.; Yamamoto, A.; Zabierowski, J.; Zielinski, M. J.; Zlomanczuk, Jozef; Zupranski, P.; Zurek, M.; Kubis, B.; Leupold, Stefan

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Measurement of the ω → π⁺π⁻π⁰ Dalitz plot distribution: The WASA-at-COSY Collaboration

Adlarson, Patrik

Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany..

Augustyniak, W.

Natl Ctr Nucl Res, Dept Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland..

Bardan, W.

Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland..

Bashkanov, M.

Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Peter Guthrie Tait Rd, Edinburgh EH9 3FD, Midlothian, Scotland..

Bergmann, F. S.

Berlowski, M.

Bhatt, H.

Bondar, A.

Buescher, M.

Calén, Hans

Ciepal, I.

Clement, H.

Czerwinski, E.

Demmich, K.

Engels, R.

Erven, A.

Erven, W.

Eyrich, W.

Fedorets, P.

Foehl, K.

Fransson, Kjell

Goldenbaum, F.

Goswami, A.

Grigoryev, K.

Gullström, Carl-Oscar

Heijkenskjöld, Lena

Hejny, V.

Huesken, N.

Jarczyk, L.

Johansson, Tord

Kamys, B.

Kemmerling, G.

Khan, F. A.

Khatri, G.

Khoukaz, A.

Khreptak, O.

Kirillov, D. A.

Kistryn, S.

Kleines, H.

Klos, B.

Krzemien, W.

Kulessa, P.

Kupsc, Andrzej

Kuzmin, A.

Lalwani, K.

Lersch, D.

Lorentz, B.

Magiera, A.

Maier, R.

Marcinievski, Pawel

Marianski, B.

Morsch, H. -P

Moskal, P.

Ohm, H.

del Rio, E. Perez

Piskunov, N. M.

Prasuhn, D.

Pszczel, D.

Pysz, K.

Pyszniak, Andrzej

Ritman, J.

Roy, A.

Rudy, Z.

Rundel, O.

Sawant, S.

Schadmand, S.

Schatti-Ozerianska, I.

Sefzick, T.

Serdyuk, V.

Shwartz, B.

Sitterberg, K.

Skorodko, T.

Skurzok, M.

Smyrski, J.

Sopov, V.

Stassen, R.

Stepaniak, J.

Stephan, E.

Sterzenbach, G.

Stockhorst, H.

Stroeher, H.

Szczurek, A.

Trzcinski, A.

Varma, R.

Wolke, Magnus

Wronska, A.

Wuestner, P.

Yamamoto, A.

Zabierowski, J.

Zielinski, M. J.

Zlomanczuk, Jozef

Zupranski, P.

Zurek, M.

Kubis, B.

Leupold, Stefan

Show others and affiliations

2017 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 770, p. 418-425 Open Access

Article in journal (Refereed) Published

Abstract [en]

Using the production reactions pd -> He-3 omega and pp -> pp omega, the Dalitz plot distribution for the omega -> pi(+)pi(-)pi(0)decay is studied with the WASA detector at COSY, based on a combined data sample of (4.408 +/- 0.042) x 10(4) events. The Dalitz plot density is parametrised by a product of the P-wave phase space and a polynomial expansion in the normalised polar Dalitz plot variables Z and phi. For the first time, a deviation from pure P-wave phase space is observed with a significance of 4.1 sigma. The deviation is parametrised by a linear term 1+2 alpha Z, with alpha determined to be +0.147 +/- 0.036, consistent with the expectations of rho-meson-type final-state interactions of the P-wave pion pairs. (C) 2017 The Author. Published by Elsevier B.V.

Place, publisher, year, edition, pages

2017. Vol. 770, p. 418-425

Keywords [en]

Decays of other mesons, Meson-meson interactions, Light mesons

National Category

Astronomy, Astrophysics and Cosmology Subatomic Physics

Identifiers

URN: urn:nbn:se:uu:diva-329932DOI: 10.1016/j.physletb.2017.03.050ISI: 000404196500054OAI: oai:DiVA.org:uu-329932DiVA, id: diva2:1180727

Funder

Swedish Research CouncilKnut and Alice Wallenberg FoundationEU, FP7, Seventh Framework Programme, 2008-1; 227431

Note

Title in WoS: Measurement of the omega -> pi(+)pi(-)pi(0) Dalitz plot distribution

Available from: 2018-02-06 Created: 2018-02-06 Last updated: 2018-12-20Bibliographically approved

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