Kollmann, W.S
STAR
AU AU --> Au$^\ast$ Au$^\ast$ $\rho^0$
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Coherent rho0 production in ultra-peripheral heavy ion collisions.

The STAR collaboration Adler, C. ; Ahammed, Z. ; Allgower, C. ; et al.
Phys.Rev.Lett. 89 (2002) 272302, 2002.
Inspire Record 588142 DOI 10.17182/hepdata.102319

The STAR collaboration reports the first observation of exclusive rho^0 photo-production, AuAu->AuAu rho^0, and rho^0 production accompanied by mutual nuclear Coulomb excitation, AuAu->Au*Au*rho^0, in ultra-peripheral heavy-ion collisions. The rho^0 have low transverse momenta, consistent with coherent coupling to both nuclei. The cross sections at sqrt(s_NN)=130GeV agree with theoretical predictions treating rho^0 production and Coulomb excitation as independent processes.

3 data tables
Figure 3.0

Differential cross section $d\sigma(\gamma Au \rightarrow \rho Au)/dt$ of $\rho^0$ candidates

Figure 4.0

Differential cross section $d\sigma/dM_{\pi\pi}$ for two-track (xn,xn) events with pair $p_T<150$ MeV/$c$

Figure 4.1

Total background in the differential cross section $d\sigma/dM_{\pi\pi}$