### Session EF: Mini-Symposium on Hadron Structure and QCD in High Energy Processes II

9:00 AM–12:00 PM, Friday, October 16, 2009
Room: Kohala 3

Chair: Misak Sargsian, Florida International University

Abstract ID: BAPS.2009.HAW.EF.12

### Abstract: EF.00012 : ${\pi^0}$ electroproduction in semi-inclusive deep inelastic scattering off D, C, Fe, Pb

11:45 AM–12:00 PM

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#### Authors:

Taisiya Mineeva
(University of Connecticut, Storrs, CT)

Will Brooks
(Universidad Tecnica Federico Santa Maria, Valparaiso, Chile)

Kyungseon Joo
(University of Connecticut, Storrs, CT)

Maurizio Ungaro
(University of Connecticut, Storrs, CT)

Measurement of neutral pion electroproduction is being performed in semi-inclusive deep inelastic scattering off deuterium, carbon, iron, and lead targets. The data were taken with the CLAS detector in Jefferson Lab using a 5.014 GeV electron beam. The two targets, liquid deuterium plus a solid foil, were positioned in the beam simultaneously. Hadronic multiplicity ratios $R^{\pi^0}_{\mathrm{A}}$ and transverse momentum broadening distributions ${\Delta}p_{T}^{2}$ were measured as a function of $\mathit{\left(z_{h},{\nu},Q^2,p_T\right)}$ kinematic bins. These results provide new insights into the phenomena of hadron formation through the access to the average lifetime of the quasi-free quark and time required to form full hadronic wave function. The status of data analysis as well as preliminary results of multiplicity ratios will be presented.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2009.HAW.EF.12