# ICHEP2018 SEOUL

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

## Study of $e^+e^-\to e^+e^- \eta'$ in the double-tag mode at BABAR

Jul 7, 2018, 12:00 PM
15m
202 (COEX, Seoul)

### 202

#### COEX, Seoul

Parallel Strong Interactions and Hadron Physics

### Speaker

Mr Evgeny Kozyrev (Budker Institute of Nuclear Physics)

### Description

We study the process $e^+e^-\to e^+e^- \eta'$ in the double-tag mode and measure for the first time the $\gamma^{\star}\gamma^{\star} \to \eta'$ transition form factor $F_{\eta'}(Q_1^2, Q_2^2)$ in the momentum-transfer
range $2 < Q_1^2, Q_2^2 < 60$ GeV$^2$. The analysis is based on data with an integrated luminosity 469 fb$^{-1}$ collected at the PEP-II $e^+e^-$ collider with the BABAR detector at center-of-mass energies near 10.6 GeV. The results for the form factor are compared with the predictions based on pQCD and VMD.

### Primary authors

Fabio Anulli (Sapienza Universita e INFN, Roma I (IT)) Mr Evgeny Kozyrev (Budker Institute of Nuclear Physics)