{"work":{"id":"ed08a075-73d2-47bb-9d0a-dc6265d959a3","openalex_id":null,"doi":null,"arxiv_id":"2109.10627","raw_key":null,"title":"Measurement of the $c$-jet mistagging efficiency in $t\\bar{t}$ events using $pp$ collision data at $\\sqrt{s}=13$ TeV collected with the ATLAS detector","authors":null,"authors_text":"ATLAS Collaboration,Measurement of the𝑐-jet mistagging efficiency in𝑡¯𝑡events using𝑝 𝑝 collision data at√𝑠=13TeV collected with the ATLAS detector, Eur","year":2021,"venue":"hep-ex","abstract":"A technique is presented to measure the efficiency with which $c$-jets are mistagged as b-jets (mistagging efficiency) using $t\\bar{t}$ events, where one of the $W$ bosons decays into an electron or muon and a neutrino and the other decays into a quark-antiquark pair. The measurement utilises the relatively large and known $W\\to cs$ branching ratio, which allows a measurement to be made in an inclusive $c$-jet sample. The data sample used was collected by the ATLAS detector at $\\sqrt{s} = 13$ TeV and corresponds to an integrated luminosity of 139 fb$^{-1}$. Events are reconstructed using a kinematic likelihood technique which selects the mapping between jets and $t\\bar{t}$ decay products that yields the highest likelihood value. The distribution of the $b$-tagging discriminant for jets from the hadronic $W$ decays in data is compared with that in simulation to extract the mistagging efficiency as a function of jet transverse momentum. The total uncertainties are in the range 3%-17%. The measurements generally agree with those in simulation but there are some differences in the region corresponding to the most stringent $b$-jet tagging requirement.","external_url":"https://arxiv.org/abs/2109.10627","cited_by_count":null,"metadata_source":"pith","metadata_fetched_at":"2026-07-08T13:54:58.711974+00:00","pith_arxiv_id":"2109.10627","created_at":"2026-05-11T04:15:58.414072+00:00","updated_at":"2026-07-08T13:54:58.711974+00:00","title_quality_ok":true,"display_title":null,"render_title":"Measurement of the $c$-jet mistagging efficiency in $t\\bar{t}$ events using $pp$ collision data at $\\sqrt{s}=13$ TeV collected with the ATLAS detector"},"hub":{"state":{"tier_text":"hub","tier":"hub","tier_reason":"10+ Pith inbound or 1,000+ external citations","pith_inbound_count":11,"external_cited_by_count":null},"tier":"hub","role_counts":[{"context_role":"background","n":4}],"polarity_counts":[{"context_polarity":"background","n":4}],"runs":{},"summary":{},"graph":{},"authors":[]}}