Improving topological cluster reconstruction using calorimeter cell timing in ATLAS
Aad, G. ; Åkesson, T.P.A. LU
; Doglioni, C.
LU
; Ekman, P.A.
LU
; Hedberg, V.
LU
; Herde, H.
LU
; Konya, B.
LU
; Lytken, E.
LU
; Poettgen, R.
LU
and Simpson, N.D.
LU
, et al.
(2024)
In European Physical Journal C
84(5).
- Abstract
- Clusters of topologically connected calorimeter cells around cells with large absolute signal-to-noise ratio (topo-clusters) are the basis for calorimeter signal reconstruction in the ATLAS experiment. Topological cell clustering has proven performant in LHC Runs 1 and 2. It is, however, susceptible to out-of-time pile-up of signals from soft collisions outside the 25 ns proton-bunch-crossing window associated with the event’s hard collision. To reduce this effect, a calorimeter-cell timing criterion was added to the signal-to-noise ratio requirement in the clustering algorithm. Multiple versions of this criterion were tested by reconstructing hadronic signals in simulated events and Run 2 ATLAS data. The preferred version is found to... (More)
- Clusters of topologically connected calorimeter cells around cells with large absolute signal-to-noise ratio (topo-clusters) are the basis for calorimeter signal reconstruction in the ATLAS experiment. Topological cell clustering has proven performant in LHC Runs 1 and 2. It is, however, susceptible to out-of-time pile-up of signals from soft collisions outside the 25 ns proton-bunch-crossing window associated with the event’s hard collision. To reduce this effect, a calorimeter-cell timing criterion was added to the signal-to-noise ratio requirement in the clustering algorithm. Multiple versions of this criterion were tested by reconstructing hadronic signals in simulated events and Run 2 ATLAS data. The preferred version is found to reduce the out-of-time pile-up jet multiplicity by ∼50% for jet pT∼20 GeV and by ∼80% for jet pT≳50 GeV, while not disrupting the reconstruction of hadronic signals of interest, and improving the jet energy resolution by up to 5% for 20 (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/e2b7815a-9c29-4169-9092-ad76800004da
- author
- Aad, G.
; Åkesson, T.P.A.
LU
; Doglioni, C.
LU
; Ekman, P.A.
LU
; Hedberg, V.
LU
; Herde, H.
LU
; Konya, B.
LU
; Lytken, E.
LU
; Poettgen, R.
LU
and Simpson, N.D.
LU
, et al. (More)
- Aad, G.
; Åkesson, T.P.A.
LU
; Doglioni, C.
LU
; Ekman, P.A.
LU
; Hedberg, V.
LU
; Herde, H.
LU
; Konya, B.
LU
; Lytken, E.
LU
; Poettgen, R.
LU
; Simpson, N.D.
LU
; Smirnova, O.
LU
and Zwalinski, L.
(Less)
- author collaboration
- organization
- publishing date
- 2024
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Calorimeters, Calorimetry, Germanium compounds, Hadrons, Photons, ATLAS experiment, Bunch crossings, Calorimeter cells, Cell clustering, Hadronics, Noise ratio, Pile-ups, Signal to noise, Signals reconstruction, Topo, Topology
- in
- European Physical Journal C
- volume
- 84
- issue
- 5
- article number
- 455
- publisher
- Springer Nature
- external identifiers
-
- scopus:85202167240
- ISSN
- 1434-6044
- DOI
- 10.1140/epjc/s10052-024-12657-1
- language
- English
- LU publication?
- yes
- additional info
- Number of authors = 2941 EID = 85202167240 Article no = 455 Affiliation = Zwalinski L., CERN, Geneva, Switzerland Affiliation = Abbott B., Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, United States Affiliation = Aad G., CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France
- id
- e2b7815a-9c29-4169-9092-ad76800004da
- date added to LUP
- 2024-10-08 11:59:14
- date last changed
- 2025-04-04 15:20:52
@article{e2b7815a-9c29-4169-9092-ad76800004da,
abstract = {{Clusters of topologically connected calorimeter cells around cells with large absolute signal-to-noise ratio (topo-clusters) are the basis for calorimeter signal reconstruction in the ATLAS experiment. Topological cell clustering has proven performant in LHC Runs 1 and 2. It is, however, susceptible to out-of-time pile-up of signals from soft collisions outside the 25 ns proton-bunch-crossing window associated with the event’s hard collision. To reduce this effect, a calorimeter-cell timing criterion was added to the signal-to-noise ratio requirement in the clustering algorithm. Multiple versions of this criterion were tested by reconstructing hadronic signals in simulated events and Run 2 ATLAS data. The preferred version is found to reduce the out-of-time pile-up jet multiplicity by ∼50% for jet pT∼20 GeV and by ∼80% for jet pT≳50 GeV, while not disrupting the reconstruction of hadronic signals of interest, and improving the jet energy resolution by up to 5% for 20}},
author = {{Aad, G. and Åkesson, T.P.A. and Doglioni, C. and Ekman, P.A. and Hedberg, V. and Herde, H. and Konya, B. and Lytken, E. and Poettgen, R. and Simpson, N.D. and Smirnova, O. and Zwalinski, L.}},
issn = {{1434-6044}},
keywords = {{Calorimeters; Calorimetry; Germanium compounds; Hadrons; Photons; ATLAS experiment; Bunch crossings; Calorimeter cells; Cell clustering; Hadronics; Noise ratio; Pile-ups; Signal to noise; Signals reconstruction; Topo; Topology}},
language = {{eng}},
number = {{5}},
publisher = {{Springer Nature}},
series = {{European Physical Journal C}},
title = {{Improving topological cluster reconstruction using calorimeter cell timing in ATLAS}},
url = {{http://dx.doi.org/10.1140/epjc/s10052-024-12657-1}},
doi = {{10.1140/epjc/s10052-024-12657-1}},
volume = {{84}},
year = {{2024}},
}