Measurement of Orbitally Excited D-Mesons at CDF II

TL;DR

This paper reports the first measurement of orbitally excited neutral D-meson states D*_2 and D_1 produced in hadron collisions at the Tevatron, with precise measurements of their masses and widths.

Contribution

It provides the first measurement of these excited D-meson states in hadron collisions, using data from the CDF II detector with improved precision.

Findings

Measured masses and widths of D*_2 and D_1 with high precision

Collected the largest sample of these states to date

Results are consistent with or improve upon world averages

Abstract

Measurement of Orbitally Excited D-Mesons at CDF II Igor V. Gorelov (For the CDF Collaboration) Talk given on behalf of the CDF Collaboration at the First Meeting of the APS Topical Group on Hadronic Physics, GHP 2004, 24-26 October 2004, FERMILAB. Results on the first measurement of orbitally excited neutral D-meson states, D*_2 and D_1, produced in hadron collisions at Tevatron are presented. Using data from the displaced track trigger, CDF II collects the largest world sample of these states in decay modes D*+ pi-, D+ pi-. Masses and widths of both states have been measured with precision better than or comparable to the world average.