A Measurement of the $D^{*\pm}$ Cross Section in Two-Photon Processes

TL;DR

This paper reports a measurement of the inclusive $D^{* ext{±}}$ production cross section in two-photon collisions at TRISTAN, providing data to compare with theoretical models of photon-induced charm production.

Contribution

It presents the first measurement of $D^{* ext{±}}$ cross sections in two-photon processes at TRISTAN energies, including differential cross sections over a range of transverse momentum.

Findings

Measured differential cross section $d\sigma/dP_T$ between 1.6 and 6.6 GeV

Compared experimental results with direct and resolved photon process predictions

Provided data for testing QCD models of photon-induced charm production

Abstract

We have measured the inclusive $D^{*\pm}$ production cross section in a two-photon collision at the TRISTAN $e^+e^-$ collider. The mean $\sqrt{s}$ of the collider was 57.16 GeV and the integrated luminosity was 150 $pb^{-1}$. The differential cross section ($d\sigma(D^{*\pm})/dP_T$) was obtained in the $P_T$ range between 1.6 and 6.6 GeV and compared with theoretical predictions, such as those involving direct and resolved photon processes.