Speaker
Description
We investigate gluon saturation signals in photon–hadron transverse energy–energy correlation (TEEC), along with the ordinary azimuthal correlations, in the forward rapidity region for proton–proton and proton–lead collisions, in the context of the HL-LHC upgrades, in particular the FoCal detector of ALICE which will cover 3.8 < η < 5.1 and the ATLAS detector with the extended coverage of |η| < 4. The calculations were performed using the CGC-based hybrid kT-factorization framework, implemented at parton level in KATIE and supplemented with initial and final-state radiation and hadronization effects simulated via CASCADE. We find both observables are sensitive to gluon saturation, however we explicitly find that the hadron-level TEEC distribution much better reflects the underlying parton dynamics than the ordinary azimuthal correlations. Based on: Phys. Rev. D 112, 114020.
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