Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

Exclusive Photoproduction of 2π+2π− Final State at HERA

Jul 6, 2018, 6:30 PM
2h
COEX, SEOUL

COEX, SEOUL

Poster Strong Interactions and Hadron Physics POSTER

Speaker

Arthur Bolz (Ruprecht Karls Universitaet Heidelberg (DE))

Description

Exclusive production of four charged pions at the ep collider HERA is studied at small photon virtualities $Q^2 < 2$ GeV$^2$. The data were taken with the H1 detector in the years 2006 and 2007 at a centre-of-mass energy of $\sqrt{s}=319$ GeV and correspond to an integrated luminosity of $7.6$ pb$^{−1}$. The cross section of the reaction $\gamma p\to 2(\pi^{+}\pi^{−})Y$ is determined in the phase space of $45 < W_{\gamma p}<100$ GeV, $\vert t\vert< 1$ GeV$^2$ and $M_Y< 1.6$ GeV. The $4\pi$ mass spectra indicate that the reaction proceeds predominatly via production and decay of $\rho^{\prime}(1450)$ and $\rho^{\prime\prime}(1700)$ resonances. Parameters of these resonances as well as production cross sections times branching ratio into four charged pions are estimated from the mass fit, which includes contributions from non-resonant $4\pi$ channel and interference terms.

Primary authors

Stefan Schmitt (Deutsches Elektronen-Synchrotron (DE)) H1 Collaboration (DESY) Arthur Bolz (Ruprecht Karls Universitaet Heidelberg (DE))

Presentation materials

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