# ICHEP2018 SEOUL

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

## Measurement of D ∗ Production in Diffractive Deep Inelastic Scattering at HERA

Jul 5, 2018, 5:10 PM
15m
101 (COEX, Seoul)

### 101

#### COEX, Seoul

Parallel Strong Interactions and Hadron Physics

### Speaker

Andrew Mehta (University of Liverpool (GB))

### Description

Measurements of $D^{∗}(2010)$ meson production in diffractive deep inelastic scattering ($5 < Q^2 < 100$ GeV$^2$) are presented which are based on HERA data recorded at a centre-of-mass energy $\sqrt{s} = 319$ GeV with an integrated luminosity of $287$ pb$^−1$. The reaction $ep\to eXY$ is studied, where the system $X$, containing at least one $D^{∗}(2010)$ meson, is separated from a leading low-mass proton dissociative system $Y$ by a large rapidity gap. The kinematics of $D^{∗}$ candidates are reconstructed in the $D^{∗}\to K\pi\pi$ decay channel. The measured cross sections compare favourably with next-to-leading order QCD predictions, where charm quarks are produced via boson-gluon fusion. The charm quarks are then independently fragmented to the $D^{∗}$ mesons. The calculations rely on the collinear factorisation theorem and are based on diffractive parton densities previously obtained by H1 from fits to inclusive diffractive cross sections. The data are further used to determine the diffractive to inclusive $D^{∗}$ production ratio in deep inelastic scattering.

Eur.Phys.J.C77 (2017), 340 [arxiv:1703.09476]

### Primary authors

Stefan Schmitt (Deutsches Elektronen-Synchrotron (DE)) H1 Collaboration (DESY) Andrew Mehta (University of Liverpool (GB))

### Presentation materials

 Mehta_H1DiffCharm_ICHEP.pdf Mehta_H1DiffCharm_ICHEP.pptx