@article{6198f10890e44380847f240421784750,
title = "Improving topological cluster reconstruction using calorimeter cell timing in ATLAS",
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{\textquoteright}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 20T<30 GeV. Pile-up is also suppressed for other physics objects based on topo-clusters (electrons, photons, τ-leptons), reducing the overall event size on disk by about 6% in early Run 3 pile-up conditions. Offline reconstruction for Run 3 includes the timing requirement.",
author = "ATLAS Collaboration and L. Zwalinski and W. Zou and O. Zormpa and Zorbas, {T. G.} and K. Zoch and A. Zoccoli and L. {\v Z}ivkovi{\'c} and M. Ziolkowski and J. Zinsser and Zimine, {N. I.} and V. Zhulanov and K. Zhukov and X. Zhuang and Y. Zhu and Y. Zhu and J. Zhu and Zhu, {C. G.} and Y. Zhou and N. Zhou and H. Zhou and B. Zhou and D. Zhong and Z. Zheng and X. Zheng and K. Zheng and J. Zheng and A. Zhemchugov and Z. Zhao and Y. Zhao and T. Zhao and H. Zhao and Z. Zhang and Z. Zhang and Y. Zhang and Y. Zhang and Y. Zhang and X. Zhang and X. Zhang and T. Zhang and S. Zhang and S. Zhang and R. Zhang and P. Zhang and L. Zhang and K. Zhang and J. Zhang and J. Zhang and Zhang, {D. F.} and B. Zhang and M. Zhai and D. Zerwas and S. Zerradi and S. Zenz and T. {\v Z}eni{\v s} and O. Zenin and Zenger, {D. T.} and Zeng, {J. C.} and H. Zeng and C. Zeitnitz and O. Zaplatilek and D. Zanzi and J. Zang and Saa, {J. A.Zamora} and S. Zambito and N. Zakharchuk and T. Zakareishvili and Zak, {Z. K.} and E. Zaid and B. Zabinski and M. Zaazoua and L. Yue and R. Yuan and M. Yuan and Y. Yu and C. Yu and C. Young and Young, {C. J.S.} and S. Younas and K. Yorita and P. Yin and Yexley, {M. R.} and Yeo, {B. K.} and I. Yeletskikh and Y. Yeh and X. Ye and S. Ye and J. Ye and H. Ye and H. Ye and Yap, {Y. C.} and Yao, {W. M.} and Z. Yang and Y. Yang and Y. Yang and X. Yang and X. Yang and T. Yang and S. Yang and Yang, {H. T.} and Yang, {H. J.} and Z. Yan and S. Yan and J. Yan and Y. Yamazaki and T. Yamazaki and H. Yamauchi and E. Yamashita and Y. Yamaguchi and S. Yacoob and B. Yabsley and Z. Xu and Z. Xu and Y. Xu and T. Xu and R. Xu and L. Xu and H. Xu and D. Xu and J. Xiong and A. Xiong and S. Xin and X. Xie and M. Xie and J. Xiang and M. Xia and L. Xia and S. Xella and Wynne, {B. M.} and Wyatt, {T. R.} and J. Wuerzinger and Z. Wu and Y. Wu and X. Wu and Wu, {S. L.} and M. Wu and M. Wu and J. Wu and C. Wu and K. Wraight and S. Wozniewski and Wo{\'z}niak, {K. W.} and Wosiek, {B. K.} and Worm, {S. D.} and Woodward, {E. L.} and Wongel, {A. F.} and H. Wolters and Wolter, {M. W.} and J. Wollrath and Z. Wolffs and M. Wobisch and M. Wittgen and Winter, {J. K.} and Winter, {B. T.} and F. Winklmeier and Winkel, {F. I.} and Windischhofer, {P. J.} and Wilson, {B. J.} and S. Willocq and S. Williams and Williams, {H. H.} and Williams, {D. M.} and Wilkens, {H. G.} and Wilbern, {D. J.} and C. Wiglesworth and M. Wielers and C. Wiel and W. Wiedenmann and L. Wickremasinghe and D. Whiteson and White, {M. J.} and A. White and White, {A. S.} and Wharton, {A. M.} and M. Wessels and N. Wermes and Wenke, {N. S.} and T. Wengler and B. Wendland and T. Wenaus and Wells, {C. J.} and C. Weiser and M. Weirich and J. Weingarten and Weik, {E. J.} and Weidberg, {A. R.} and Y. Wei and C. Wei and Weber, {M. S.} and Weber, {M. S.} and Weber, {H. A.} and C. Weber and Waugh, {B. M.} and G. Watts and E. Watton and Watson, {M. F.} and H. Watson and Watson, {A. T.} and N. Warrack and Ward, {R. J.} and A. Warburton and Z. Wang and Z. Wang and Z. Wang and Y. Wang and Y. Wang and X. Wang and X. Wang and X. Wang and W. Wang and Wang, {W. T.} and T. Wang and S. Wang and Wang, {S. M.} and R. Wang and R. Wang and Wang, {R. J.} and J. Wang and H. Wang and C. Wang and C. Wang and Wang, {A. Z.} and T. Wamorkar and A. Wall and W. Walkowiak and R. Walker and J. Walder and M. Wakida and H. Wahlberg and S. Wahdan and W. Wagner and Wagner, {J. M.} and C. Wagner and S. Wada and I. Vukotic and O. Vujinovic and R. Vuillermet and M. Vreeswijk and Milosavljevic, {M. Vranjes} and N. Vranjes and L. Vozdecky and M. Vozak and Vossebeld, {J. H.} and K. Voss and M. Vos and K. Vorobev and V. Vorobel and B. Vormwald and {Von Toerne}, E. and {Von Ahnen}, J. and J. Shojaii",
note = "Copyright the Author(s) 2024. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",
year = "2024",
month = may,
doi = "10.1140/epjc/s10052-024-12657-1",
language = "English",
volume = "84",
pages = "1--42",
journal = "European Physical Journal C",
issn = "1434-6052",
publisher = "Springer, Springer Nature",
number = "5",
}