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Measurement of jet radial profiles in Pb–Pb collisions at sqrt(𝑠NN)= 2.76 TeVстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 3 октября 2019 г.
- Авторы: Malinina L., ALICE C.
- Журнал: Physics Letters B
- Том: 796
- Год издания: 2019
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 204
- DOI: 10.1016/j.physletb.2019.07.020
- Аннотация: The jet radial structure and particle transverse momentum ( pT ) composition within jets are presented in centrality-selected Pb–Pb collisions at sNN=2.76 TeV. Track-based jets, which are also called charged jets, were reconstructed with a resolution parameter of R=0.3 at midrapidity |ηch jet|<0.6 for transverse momenta pT,ch jet=30 –120 GeV/ c . Jet–hadron correlations in relative azimuth and pseudorapidity space ( Δφ,Δη ) are measured to study the distribution of the associated particles around the jet axis for different pT,assoc -ranges between 1 and 20 GeV/ c . The data in Pb–Pb collisions are compared to reference distributions for pp collisions, obtained using embedded PYTHIA simulations. The number of high- pT associate particles ( 4<pT,assoc<20 GeV/ c ) in Pb–Pb collisions is found to be suppressed compared to the reference by 30 to 10%, depending on centrality. The radial particle distribution relative to the jet axis shows a moderate modification in Pb–Pb collisions with respect to PYTHIA. High- pT associate particles are slightly more collimated in Pb–Pb collisions compared to the reference, while low- pT associate particles tend to be broadened. The results, which are presented for the first time down to pT,ch jet=30 GeV/ c in Pb–Pb collisions, are compatible with both previous jet–hadron-related measurements from the CMS Collaboration and jet shape measurements from the ALICE Collaboration at higher pT , and add further support for the established picture of in-medium parton energy loss.
- Добавил в систему: Малинина Людмила Владимировна