measurement of the ω→π+π−π0 dalitz plot distribution
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ID: 190929
2017
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Abstract
Using the production reactions pd→He3ω and pp→ppω, the Dalitz plot distribution for the ω→π+π−π0 decay is studied with the WASA detector at COSY, based on a combined data sample of (4.408±0.042)×104 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 ϕ. For the first time, a deviation from pure P-wave phase space is observed with a significance of 4.1σ. The deviation is parametrised by a linear term 1+2αZ, with α determined to be +0.147±0.036, consistent with the expectations of ρ-meson-type final-state interactions of the P-wave pion pairs.
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adlarson2017physicsmeasurement
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| Authors | ;P. Adlarson;W. Augustyniak;W. Bardan;M. Bashkanov;F.S. Bergmann;M. Berłowski;H. Bhatt;A. Bondar;M. Büscher;H. Calén;I. Ciepał;H. Clement;E. Czerwiński;K. Demmich;R. Engels;A. Erven;W. Erven;W. Eyrich;P. Fedorets;K. Föhl;K. Fransson;F. Goldenbaum;A. Goswami;K. Grigoryev;C.-O. Gullström;L. Heijkenskjöld;V. Hejny;N. Hüsken;L. Jarczyk;T. Johansson;B. Kamys;G. Kemmerling;F.A. Khan;G. Khatri;A. Khoukaz;O. Khreptak;D.A. Kirillov;S. Kistryn;H. Kleines;B. Kłos;W. Krzemień;P. Kulessa;A. Kupść;A. Kuzmin;K. Lalwani;D. Lersch;B. Lorentz;A. Magiera;R. Maier;P. Marciniewski;B. Mariański;H.-P. Morsch;P. Moskal;H. Ohm;E. Perez del Rio;N.M. Piskunov;D. Prasuhn;D. Pszczel;K. Pysz;A. Pyszniak;J. Ritman;A. Roy;Z. Rudy;O. Rundel;S. Sawant;S. Schadmand;I. Schätti-Ozerianska;T. Sefzick;V. Serdyuk;B. Shwartz;K. Sitterberg;T. Skorodko;M. Skurzok;J. Smyrski;V. Sopov;R. Stassen;J. Stepaniak;E. Stephan;G. Sterzenbach;H. Stockhorst;H. Ströher;A. Szczurek;A. Trzciński;R. Varma;M. Wolke;A. Wrońska;P. Wüstner;A. Yamamoto;J. Zabierowski;M.J. Zieliński;J. Złomańczuk;P. Żuprański;M. Żurek |
| Journal | ACS chemical biology |
| Year | 2017 |
| DOI |
10.1016/j.physletb.2017.03.050
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