Abstract
Measurements of reconstructed jets in high-energy proton–lead collisions over a wide rapidity and transverse momentum range can serve as a detailed probe of the partonic structure of nuclei over a large ( x , Q 2 ) range. Inclusive jet production may be sensitive to the nuclear modification of parton distribution functions and such effects as the energy loss of the initial state partons entering into the hard scattering. Furthermore, any modification of jet production in p + Pb collisions can provide context for the strong suppression observed in central 2.76 TeV Pb + Pb collisions which is attributed to the formation of a hot nuclear medium. We present a measurement of inclusive jet production in p + Pb collisions with the ATLAS detector at the LHC. While the jet rate in minimum bias p + Pb events is seen to be only slightly enhanced above the geometric expectation, the centrality-dependent yields are observed to be modified, with systematically stronger effects at higher p T and at more forward (proton-going) rapidities.
Highlights
Inclusive jet production in proton-nucleus (p+A) collisions may be a sensitive probe of the partonic structure of the nucleus and its possible modification in the high partonic density environment[1]
We present measurements of the centrality- and rapidity-dependent nuclear modification factors for high transverse momentum jets over five units of rapidity (y∗) by the ATLAS detector[8] at the LHC
These proceedings present a measurement of inclusive jet production in p+Pb collisions at 5.02 TeV with the ATLAS detector at the LHC
Summary
Inclusive jet production in proton-nucleus (p+A) collisions may be a sensitive probe of the partonic structure of the nucleus and its possible modification in the high partonic density environment[1]. Previous measurements of the nuclear modification of hadrons and jets in d+Au collisions at RHIC have tended to focus on the forward region[5], where shadowing effects are expected to be important, or midrapidity[6], where jet rates are expected to test high-Q2 initial state or impact-parameter dependent nPDF effects[7]. In these proceedings, we present measurements of the centrality- and rapidity-dependent nuclear modification factors for high transverse momentum (pT) jets over five units of rapidity (y∗) by the ATLAS detector[8] at the LHC.
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