Abstract
We report on the measurement of production in the dielectron channel at midrapidity in and collisions at from the STAR experiment at the Relativistic Heavy Ion Collider. The transverse momentum spectra in for and collisions for are presented. These measurements extend the STAR coverage for production in collisions to low . The from the measured invariant cross section in and collisions are evaluated and compared to similar measurements at other collision energies. The nuclear modification factor for is extracted as a function of and collision centrality in and compared to model calculations using the modified nuclear parton distribution function and a final-state nuclear absorption cross section.
6 More- Received 5 February 2016
- Revised 28 April 2016
DOI:https://doi.org/10.1103/PhysRevC.93.064904
©2016 American Physical Society