# ICHEP2018 SEOUL

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

## Exclusive rho(770) photoproduction at HERA

Jul 5, 2018, 9:30 AM
15m
101 (COEX, Seoul)

### 101

#### COEX, Seoul

Parallel Strong Interactions and Hadron Physics

### Speaker

Arthur Bolz (Ruprecht Karls Universitaet Heidelberg (DE))

### Description

Exclusive photoproduction of $\rho(770)$ vector mesons is studied using the H1 detector at HERA. A sample of about $700000$ decays $\rho\to\pi^{+}\pi^{-}$ was collected in the years 2006-2007, using the H1 fast track trigger. It corresponds to an integrated luminosity of $1.3$ pb$^{-1}$. The sample is used to study cross-sections as a function of the invariant mass $m_{\pi\pi}$ of the decay pions, the photon-proton collision energy $W$ and the momentum transfer at the proton vertex $t$. The phase-space restrictions are $0.5< m_{\pi\pi}<1.3$ GeV, $20< W< 80$ GeV and $\vert t\vert< 1.5$ GeV$^2$. Reactions where the proton stays intact are statistically separated from those where the proton dissociates to a low-mass hadronic system. The observed cross-section dependencies are parameterized using fits and are compared to expectations from phenomenological models.

### Primary authors

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