¤ OpenAccess: Green

This work has “Green” OA status. This means it may cost money to access on the publisher landing page, but there is a free copy in an OA repository.

<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">Δ</mml:mi><mml:mo>(</mml:mo><mml:mn>1232</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> Dalitz decay in proton-proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>T</mml:mi><mml:mo>=</mml:mo><mml:mn>1.25</mml:mn></mml:mrow></mml:math> GeV measured with HADES at GSI

J. Adamczewski-Musch,Oliver Werner Arnold,E. T. Atomssa,C. Behnke,A. Belounnas,A. Belyaev,J. C. Berger-Chen,Jacek Bogumil Biernat,A. Blanco,Christoph Blume,M. Böhmer,P. Bordalo,S. Chernenko,L. Chlad,C. Deveaux,J. Dreyer,A. Dybczak,Eliane Epple,Laura Fabbietti,O. Fateev,P. Filip,P. Finocchiaro,P. Fonte,C. Franco,J. Friese,I. Fröhlich,T. Galatyuk,J. A. Garzón,R. Gernhäuser,M. Golubeva,F. Guber,M. Gumberidze,S. Harabasz,T. Heinz,T. Hennino,S. Hlaváč,C. Höhne,R. Holzmann,A. Ierusalimov,A. Ivashkin,B. Kämpfer,Tatiana Karavicheva,B. Kardan,I. Köenig,W. Koenig,B. W. Kolb,G. Korcyl,Georgui Kornakov,R. Kötte,W. Kühn,А. Куглер,T. Kunz,Alexander Kurepin,A. Kurilkin,P. K. Kurilkin,V. P. Ladygin,R. Lalik,Kirill Lapidus,A. Lebedev,T. Liu,L. Lopes,M. Lorenz,Tariq Mahmoud,L. Maier,A. Mangiarotti,J. Markert,S. Maurus,V. Metag,J. Michel,E. Morinière,D. M. Mihaylov,S. V. Morozov,C. Müntz,Robert Helmut Münzer,L. Naumann,K. Nowakowski,Marek Pałka,Y. Parpottas,V. Pechenov,O. Pechenova,Vlasios Petousis,O. Petukhov,J. Pietraszko,W. Przygoda,S. Ramos,B. Ramstein,A. Reshetin,P. Rodríguez-Ramos,P. Rosier,A. Rost,A. Sadovsky,P. Salabura,T. Scheib,H. Schuldes,E. Schwab,F. Scozzi,F. Seck,P. Sellheim,J. Siebenson,L. Silva,Yu. G. Sobolev,S. Spataro,H. Ströbele,J. Stroth,P. Strzempek,C. Sturm,O. Svoboda,P. Tlustý,M. Traxler,H. Tsertos,E. Usenko,V. Wagner,C. Wendisch,M.G. Wiebusch,J. Wirth,Y. Zanevsky,P. Zumbruch,A. Sarantsev

Physics

Dalitz plot

Hadron

2017

We report on the investigation of $\Delta$(1232) production and decay in proton-proton collisions at a kinetic energy of 1.25 GeV measured with HADES. Exclusive dilepton decay channels $ppe^{+}e^{-}$ and $ppe^{+}e^{-}\gamma$ have been studied and compared with the partial wave analysis of the hadronic $pp\pi^{0}$ channel. They allow to access both $\Delta^+ \to p\pi^0(e^+e^-\gamma)$ and $\Delta^+ \to pe^+e^-$ Dalitz decay channels. The perfect reconstruction of the well known $\pi^0$ Dalitz decay serves as a proof of the consistency of the analysis. The $\Delta$ Dalitz decay is identified for the first time and the sensitivity to N-$\Delta$ transition form factors is tested. The $\Delta$(1232) Dalitz decay branching ratio is also determined for the first time; our result is (4.19 $\pm$ 0.62 syst. $\pm$ 0.34 stat.) $\times $ 10$^{-5}$, albeit with some model dependence.

Cite this:

Generate Citation

“<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="normal">Δ</mml:mi><mml:mo>(</mml:mo><mml:mn>1232</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> Dalitz decay in proton-proton collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>T</mml:mi><mml:mo>=</mml:mo><mml:mn>1.25</mml:mn></mml:mrow></mml:math> GeV measured with HADES at GSI” is a paper by J. Adamczewski-Musch Oliver Werner Arnold E. T. Atomssa C. Behnke A. Belounnas A. Belyaev J. C. Berger-Chen Jacek Bogumil Biernat A. Blanco Christoph Blume M. Böhmer P. Bordalo S. Chernenko L. Chlad C. Deveaux J. Dreyer A. Dybczak Eliane Epple Laura Fabbietti O. Fateev P. Filip P. Finocchiaro P. Fonte C. Franco J. Friese I. Fröhlich T. Galatyuk J. A. Garzón R. Gernhäuser M. Golubeva F. Guber M. Gumberidze S. Harabasz T. Heinz T. Hennino S. Hlaváč C. Höhne R. Holzmann A. Ierusalimov A. Ivashkin B. Kämpfer Tatiana Karavicheva B. Kardan I. Köenig W. Koenig B. W. Kolb G. Korcyl Georgui Kornakov R. Kötte W. Kühn А. Куглер T. Kunz Alexander Kurepin A. Kurilkin P. K. Kurilkin V. P. Ladygin R. Lalik Kirill Lapidus A. Lebedev T. Liu L. Lopes M. Lorenz Tariq Mahmoud L. Maier A. Mangiarotti J. Markert S. Maurus V. Metag J. Michel E. Morinière D. M. Mihaylov S. V. Morozov C. Müntz Robert Helmut Münzer L. Naumann K. Nowakowski Marek Pałka Y. Parpottas V. Pechenov O. Pechenova Vlasios Petousis O. Petukhov J. Pietraszko W. Przygoda S. Ramos B. Ramstein A. Reshetin P. Rodríguez-Ramos P. Rosier A. Rost A. Sadovsky P. Salabura T. Scheib H. Schuldes E. Schwab F. Scozzi F. Seck P. Sellheim J. Siebenson L. Silva Yu. G. Sobolev S. Spataro H. Ströbele J. Stroth P. Strzempek C. Sturm O. Svoboda P. Tlustý M. Traxler H. Tsertos E. Usenko V. Wagner C. Wendisch M.G. Wiebusch J. Wirth Y. Zanevsky P. Zumbruch A. Sarantsev published in 2017. It has an Open Access status of “green”. You can read and download a PDF Full Text of this paper here.