Photon-tagged measurements of jet quenching with ATLAS
Metadata
Show full item recordEditorial
Elsevier BV
Materia
Heavy ion collisions Quark-gluon plasma Parton energy loss Jet quenching Jet fragmentation
Date
2019Referencia bibliográfica
Castro, N. F. (2019). Photon-tagged measurements of jet quenching with ATLAS. Nuclear Physics A 982 (2019) 595–598
Abstract
Events containing a high transverse momentum (pT) prompt photon offer a useful way to study the dynamics of the
hot, dense medium produced in heavy ion collisions. Because photons do not carry color charge, they are unaffected
by the medium, and thus provide information about the momentum, direction, and flavor (quark or gluon) of the associated
hard-scattered parton before it begins to shower and become quenched. In particular, the presence of a high-pT
photon can be used to select pp and Pb+Pb events with the same configuration before quenching, limiting the effects of
quenching-induced selection biases present in other jet measurements. The large statistics pp and Pb+Pb data delivered
by the LHC in 2015 allow for a detailed study of photon-tagged jet quenching effects, such as the overall parton energy
loss and modified structure of the component of the shower which remains correlated with the initial parton direction
(e.g. in cone). In this proceeding, photon-tagged measurements of jet quenching by ATLAS are reported.