# Production of W/H+jets in Relativistic heavy-ion collisions

- Institution: CERN
- Department: Conferences
- Speaker: Shan-Liang Zhang
- Year: 2020
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3000806)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

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.…

## Lectures

1. [Production of W/H+jets in Relativistic heavy-ion collisions](https://invisiblenetwork.ai/learn/cern/3000806/594cadaca337), 18 min (CERN's player)