About
Gauge boson associated with jet production is a perfect channel for jet quenching. Z+jet and $\gamma+$jet correlations have already been investigated by several theory models and experimental groups in both p+p and Pb-Pb collisions at $\sqrt s=5.02$ TeV. However, W+jets are dominated by quark jet and H+jet are mainly gluon jet, the comparison of W+jet and H+jet would provide complementary information of jet quenching.
In the talk, we report a systematic calculation of W/H+jet production in Pb-Pb collisions at the LHC including jet quenching effects in the QGP. In the model, a nice baseline description of W+jet in p+p is achieved by utilizing Sherpa, a Monte Carlo event generator which combines the NLO with resummation by a matched parton shower (PS), and the parton energy loss in hot/dense QCD medium is simulated by Linear Boltzmann Transport(LBT) model.
We make predictions for the first time for the modifications of W/H+jet events due to jet-medium interactions: the modification of the distributions of events as a function of the vector sum of the lepton and jets $|\vec{p}_T^{Miss}|$, which is enhanced in small $|\vec{p}_T^{Miss}| $ region and suppressed in large $|\vec{p}_T^{Miss}|$ region due to jet energy loss in the opposite direction of the W boson. This observable can be easily observed in experimental and provide new information of jet quenching. While $|\vec{p}_T^{Miss}|$, is significantly broadened in PbPb collisions for H+jet event. Furthermore, we have investigated the shift of W/H+jet $p_T$ imbalance distribution $x_{jV}$, the suppression of jet yield per W/H trigger $R_{jV}$ and the modification of W/H+jet azimuthal angle correlations $\Delta \phi_{jV}$ as Z+jets, multi-jets have important contributions in small $\Delta \phi_{jV}$ and $x_{jV}$ phase space and the differences between W/H+jet and Z+jet will be discussed. We find that, H have much less jet partners and the tagged jet has smaller energy, but they loss the same fraction of its energy.…
The talk
Credits and licence
- Institution
- CERN
- Department
- Conferences
- Speaker
- Shan-Liang Zhang
- Year
- 2020
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
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