Speaker
Dr
Soumya Mohapatra
(Columbia University)
Description
Measurements of isolated prompt photon, massive electroweak boson, and jet production in small collision systems are of great interest to understanding the partonic structure of heavy nuclei, and serve as a constraint on the initial state in larger collision systems. These channels are sensitive to a variety of effects such as the modification of the parton densities in nuclei, including the possible onset of non-linear QCD effects in certain kinematic regions, and the energy loss of partons as they undergo multiple interactions in the nucleus before the hard parton-parton scattering. High-statistics samples of proton–lead collision data at $\sqrt{s_{_\mathrm{NN}}}=5.02$ TeV and 8.16 TeV taken in 2016, as well as proton–proton comparison data at analogous collision energies, allow for a detailed study of these phenomena in data and comprehensive comparisons to the predictions of a variety of theoretical approaches. This talk presents the latest ATLAS and CMS results in these and other topics, including new results from Run 2 proton–lead collisions on inclusive prompt photon production over a broad kinematic range, and angular correlations of forward dijets intended to probe the small-$x$ region. Results will also be shown on yields and two-particle correlations involving open and closed heavy flavor mesons, both measured directly and through their semileptonic decays, to study energy loss and transport properties of heavy quarks in the QGP.
| [email protected] | |
| Collaboration name | ATLAS Collaboration |
Primary author
Dr
Soumya Mohapatra
(Columbia University)
