Exploring Matter with Precision Charm and Beauty Production Measurements in Heavy Nuclei Collisions at LHCb

Informations projet

EXPLORINGMATTER

N° de convention de subvention: 647390

DOI

10.3030/647390

Projet clôturé

Date de signature de la CE 23 Mars 2015

Date de début 1 Avril 2015

Date de fin 31 Decembre 2021

Financé au titre de

• EXCELLENT SCIENCE - European Research Council (ERC)

Coût total

€ 1 849 957,00

Contribution de l’UE

€ 1 849 957,00

Coordonné par

UNIVERSITA DEGLI STUDI DI CAGLIARI
Italy

Periodic Reporting for period 4 - EXPLORINGMATTER (Exploring Matter with Precision Charm and Beauty Production Measurements in Heavy Nuclei Collisions at LHCb)

Période du rapport: 2019-10-01 au 2021-12-31

Résumé du contexte et des objectifs généraux du projet

EXPLORINGMATTER is a project which uses the experiment LHCb at CERN to study heavy nuclei collisions in a configuration and energy never explored before. These studies can shed light to the Quark Gluon Plasma, a new state of matter still largely unknown.The objectives of the project are listed below.
• Objective 1 is to collect data in the three configurations necessary to probe QGP formation and its characteristics: pp, pA and AB collisions, where A and B are the heavy nuclei types.
• Objective 2 and 3 are to analyse the data to obtain precise measurements of charmonium, bottomonium and open charm and beauty production in heavy-ions collisions and of cold nuclear matter effects.
• Objective 4 is to use the results and techniques from EXPLORINGMATTER to think and design future experiments.

Travail effectué depuis le début du projet jusqu’à la fin de la période considérée dans le rapport et principaux résultats atteints jusqu’à présent

The main activities in the first period have been
centered around the collection of the data in the pPb, PbPb and
SMOG configurations, the last two for the first time ever at LHCb.
The data have been collected, stored, reconstructed and
analysed by my team, with the help of the experts in the
collaboration.
The analysis with the PbPb data
were very challenging due to the high multiplicities involved and
gave us an important sample of data to
develop new techniques to analyse these data and prepare for the future run.
The publications obtained using the PbPb data were the first ever at LHCb and
an outstanding milestone despite the limited reach in centrality available.
The analyses of the fixed-target samples has been another breakthrough of the project, being
completely unique in all aspects and addressing an energy not available anywhere else in
the world at the moment. The results from these analyses had huge impact in several areas
of physics, from particle to nuclear to astrophysics.
Finally, the analyses performed with the pPb sample showed a high-level
of precision and thanks to ExploringMatter team members LHCb was the first LHC experiment to publish on this
sample.
In addition, members of ExploringMatter were involved in studies for the upcoming 2022
Run 3 and in future
detectors developments meant to strengthen the LHCb participation in the heavy-ion physics
field.

Progrès au-delà de l’état des connaissances et impact potentiel prévu (y compris l’impact socio-économique et les conséquences sociétales plus larges du projet jusqu’à présent)

Through ExploringMatter, PbPb collisions have been collected at LHCb for the first time,
and for the first time this region in rapidity has been explored
at this energy with this precision. The study of the several particle production
in pPb has been studied for the first time down to
zero momentum, crucial milestones for the understanding of
cold nuclear matter effects. The results in SMOG collisions
are the first and thus completely unique.
This project has no impact on society.

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