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Mixing: What’s in the Update?

2.4 fb -1. Mixing: What’s in the Update?. More data: 2.4 fb -1 (2x previous) Better detector: Layer 0 silicon Track-by-track IP resolution uncertainty Same side flavor tagging (SST) Additional channel: hadronic decays Better boost description. Experimentally demanding.

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Mixing: What’s in the Update?

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  1. 2.4 fb-1 Mixing: What’s in the Update? • More data: 2.4 fb-1 (2x previous) • Better detector: Layer 0 silicon • Track-by-track IP resolution uncertainty • Same side flavor tagging (SST) • Additional channel: hadronic decays • Better boost description Experimentally demanding FNAL Wine and Cheese, DØ/Hobbs

  2. Mixing: Two of the Improvements Bs hadronic decays Improved flavor tagging Tag eD2 Old OST 2.5 ± 0.2% SST 1.7 ± 0.6% New OST 4.5 ± 0.9% (evt charge) m trigger Dse, Dsp 22 ± 5% Trigger => e = 100% FNAL Wine and Cheese, DØ/Hobbs

  3. Mixing -logL 3.1s Dms Channels: mfp efp mK*K pfp Stat + Sys Stat + Sys 2.4 fb-1 (Data thru end May) FNAL Wine and Cheese, DØ/Hobbs

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