Figures from paper submitted to Physical Review C
Abstract:
The ALICE Collaboration reports measurements of the semi-inclusive distribution of charged-particle jets recoiling from a high transverse momentum (high $p_{\rm T}$) charged hadron, in pp and central Pb$-$Pb collisions at center of mass energy per nucleon$-$nucleon collision $\sqrt{s_{\rm NN}}=5.02$ TeV. The large uncorrelated background in central Pb$-$Pb collisions is corrected using a data-driven statistical approach, which enables precise measurement of recoil jet distributions over a broad range in $p_{\rm T,ch\,jet}$ and jet resolution parameter $R$. Recoil jet yields are reported for $R=0.2$, 0.4, and 0.5 in the range $7 <~ p_{\rm T,ch\, jet} <~ 140$ GeV$/c$ and $\pi/2<~\Delta\varphi<~\pi$, where $\Delta\varphi$ is the azimuthal angular separation between hadron trigger and recoil jet. The low $p_{\rm T,ch\,jet}$ reach of the measurement explores unique phase space for studying jet quenching, the interaction of jets with the quark-gluonnplasma generated in high-energy nuclear collisions. Comparison of $p_{\rm T,ch\,jet}$ distributions from pp and central Pb$-$Pb collisions probes medium-induced jet energy loss and intra-jet broadening, while comparison of their acoplanarity distributions explores in-medium jet scattering and medium response. The measurements are compared to theoretical calculations incorporating jet quenching.
e-Print: arXiv:2308.16128 | PDF | inSPIRE
![](/system/files/figures/jnorman/hJetRawPt_DeltaPhiVsPt_pp_PbPb_R04-thumb.gif)
![](/system/files/figures/jnorman/hJetRawPt_DeltaPhi_withIntYield_allR-thumb.gif)
![](/system/files/figures/jnorman/hJetRawPtRatio_DeltaPhi_withIntYield_allR-thumb.gif)
![](/system/files/figures/jnorman/RawPP_SigRef_Pt_R04_57_2050-thumb.gif)
![](/system/files/figures/jnorman/RawPP_SigRefRatio_Pt_R04_57_2050-thumb.gif)
![](/system/files/figures/jnorman/ClosureDeltaPhi_Multiple_R020405-thumb.gif)
![](/system/files/figures/jnorman/ClosurePt_Multiple_R020405-thumb.gif)
![](/system/files/figures/jnorman/SpectraPtpp_withTheory_R020405_fitRatio-thumb.gif)
![](/system/files/figures/jnorman/DeltaPhippVsTheory_Multiple_R02_fitRatio-thumb.gif)
![](/system/files/figures/jnorman/DeltaPhippVsTheory_Multiple_R04_fitRatio-thumb.gif)
![](/system/files/figures/jnorman/DeltaPhippVsTheory_Multiple_R05_fitRatio-thumb.gif)
![](/system/files/figures/jnorman/SpectraPtPbPb_withTheory_R020405_fitRatio-thumb.gif)
![](/system/files/figures/jnorman/DeltaPhiPbPbVsTheory_Multiple_R02_fitRatio-thumb.gif)
![](/system/files/figures/jnorman/DeltaPhiPbPbVsTheory_Multiple_R04_fitRatio-thumb.gif)
![](/system/files/figures/jnorman/DeltaPhiPbPbVsTheory_Multiple_R05_fitRatio-thumb.gif)
![](/system/files/figures/jnorman/IAA_TTscan_R02_DataRef_withJetscape_shift_noXerr-thumb.gif)
![](/system/files/figures/jnorman/IAA_TTscan_R04_DataRef_withJetscape_shift_noXerr-thumb.gif)
![](/system/files/figures/jnorman/DeltaPhi_Multiple_R02_logRatio_withHybrid-thumb.gif)
![](/system/files/figures/jnorman/DeltaPhi_Multiple_R04_logRatio_withHybrid-thumb.gif)
![](/system/files/figures/jnorman/DeltaPhi_Multiple_R05_logRatio-thumb.gif)