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タイトル
和文:Identification and rejection of pile-up jets at high pseudorapidity with the ATLAS detector 
英文:Identification and rejection of pile-up jets at high pseudorapidity with the ATLAS detector 
著者
和文: M. Aaboud, 陣内 修, 久世 正弘, 山口 洋平, et al..  
英文: M. Aaboud, Osamu Jinnouchi, Masahiro.Kuze, Youhei Yamaguchi, et al..  
言語 English 
掲載誌/書名
和文:European Physical Journal C 
英文:European Physical Journal C 
巻, 号, ページ Vol. 77    No. 9    pp. "580"
出版年月 2017年9月 
出版者
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英文: 
会議名称
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開催地
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公式リンク https://www.scopus.com/inward/record.uri?eid=2-s2.0-85028970999&doi=10.1140%2fepjc%2fs10052-017-5081-5&partnerID=40&md5=1f7b660378c4c7163115c929ce9eeedf
 
DOI https://doi.org/10.1140/epjc/s10052-017-5081-5
アブストラクト The rejection of forward jets originating from additional proton?proton interactions (pile-up) is crucial for a variety of physics analyses at the LHC, including Standard Model measurements and searches for physics beyond the Standard Model. The identification of such jets is challenging due to the lack of track and vertex information in the pseudorapidity range $|\eta |>2.5$ . This paper presents a novel strategy for forward pile-up jet tagging that exploits jet shapes and topological jet correlations in pile-up interactions. Measurements of the per-jet tagging efficiency are presented using a data set of 3.2?fb$^{-1}$ of proton?proton collisions at a centre-of-mass energy of 13 $\,\text {TeV}$ collected with the ATLAS detector. The fraction of pile-up jets rejected in the range $2.5<|\eta |<4.5$ is estimated in simulated events with an average of 22 interactions per bunch-crossing. It increases with jet transverse momentum and, for jets with transverse momentum between 20 and 50 GeV, it ranges between 49% and 67% with an efficiency of 85% for selecting hard-scatter jets. A case study is performed in Higgs boson production via the vector-boson fusion process, showing that these techniques mitigate the background growth due to additional proton?proton interactions, thus enhancing the reach for such

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