Exploration of jet substructure using iterative declustering in pp and Pb–Pb collisions at LHC energies
(2020) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 802.- Abstract
- The ALICE collaboration at the CERN LHC reports novel measurements of jet substructure in pp collisions at s=7 TeV and central Pb–Pb collisions at sNN=2.76 TeV. Jet substructure of track-based jets is explored via iterative declustering and grooming techniques. We present the measurement of the momentum sharing of two-prong substructure exposed via grooming, the zg, and its dependence on the opening angle, in both pp and Pb–Pb collisions. We also present the measurement of the distribution of the number of branches obtained in the iterative declustering of the jet, which is interpreted as the number of its hard splittings. In Pb–Pb collisions, we observe a suppression of symmetric splittings at large opening angles and an enhancement of... (More)
- The ALICE collaboration at the CERN LHC reports novel measurements of jet substructure in pp collisions at s=7 TeV and central Pb–Pb collisions at sNN=2.76 TeV. Jet substructure of track-based jets is explored via iterative declustering and grooming techniques. We present the measurement of the momentum sharing of two-prong substructure exposed via grooming, the zg, and its dependence on the opening angle, in both pp and Pb–Pb collisions. We also present the measurement of the distribution of the number of branches obtained in the iterative declustering of the jet, which is interpreted as the number of its hard splittings. In Pb–Pb collisions, we observe a suppression of symmetric splittings at large opening angles and an enhancement of splittings at small opening angles relative to pp collisions, with no significant modification of the number of splittings. The results are compared to predictions from various Monte Carlo event generators to test the role of important concepts in the evolution of the jet in the medium such as colour coherence. © 2020 The Author(s) (Less)
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- author
- Acharya, S ; Adolfsson, Jonatan LU ; Christiansen, Peter LU ; Nassirpour, Adrian LU ; Oskarsson, Anders LU ; Richert, Tuva LU ; Vazquez Rueda, Omar LU ; Silvermyr, David LU ; Stenlund, Evert LU and Zurlo, N
- author collaboration
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- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- volume
- 802
- article number
- 135227
- publisher
- Elsevier
- external identifiers
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- scopus:85078992203
- ISSN
- 0370-2693
- DOI
- 10.1016/j.physletb.2020.135227
- language
- English
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- yes
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- c4ece457-3a34-47f4-ab74-7222082ea1c2
- date added to LUP
- 2020-02-14 10:05:02
- date last changed
- 2023-04-10 08:27:58
@article{c4ece457-3a34-47f4-ab74-7222082ea1c2, abstract = {{The ALICE collaboration at the CERN LHC reports novel measurements of jet substructure in pp collisions at s=7 TeV and central Pb–Pb collisions at sNN=2.76 TeV. Jet substructure of track-based jets is explored via iterative declustering and grooming techniques. We present the measurement of the momentum sharing of two-prong substructure exposed via grooming, the zg, and its dependence on the opening angle, in both pp and Pb–Pb collisions. We also present the measurement of the distribution of the number of branches obtained in the iterative declustering of the jet, which is interpreted as the number of its hard splittings. In Pb–Pb collisions, we observe a suppression of symmetric splittings at large opening angles and an enhancement of splittings at small opening angles relative to pp collisions, with no significant modification of the number of splittings. The results are compared to predictions from various Monte Carlo event generators to test the role of important concepts in the evolution of the jet in the medium such as colour coherence. © 2020 The Author(s)}}, author = {{Acharya, S and Adolfsson, Jonatan and Christiansen, Peter and Nassirpour, Adrian and Oskarsson, Anders and Richert, Tuva and Vazquez Rueda, Omar and Silvermyr, David and Stenlund, Evert and Zurlo, N}}, issn = {{0370-2693}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}}, title = {{Exploration of jet substructure using iterative declustering in pp and Pb–Pb collisions at LHC energies}}, url = {{http://dx.doi.org/10.1016/j.physletb.2020.135227}}, doi = {{10.1016/j.physletb.2020.135227}}, volume = {{802}}, year = {{2020}}, }