Online b-jets Tagging at CDF.

Amerio, S. ; Casarsa, M. ; Cortiana, G. ; Lucchesi, D. ; Griso, S. P.

Technical Information Center Oak Ridge Tennessee

关键词: Algorithms;    Fermilab collider detector;    Quarks;    Higgs bosons;    Decay;   

RP-ID  :  DE2008909892

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We propose a method to identify b-quark jets at trigger level which exploits recently increased CDF trigger system capabilities. b-quark jets identification is of central interest for the CDF high-P(sub T) physics program, and the possibility to select online b-jets enriched samples can extend the physics reaches especially for light Higgs boson searches where the H (yields) b(bar b) decay mode is dominant. Exploiting new trigger primitives provided by two recent trigger upgrades, the Level2 XFT stereo tracking and the improved Level2 cluster-finder, in conjunction with the existing Silicon Vertex Tracker (SVT), we design an online trigger algorithm aimed at selecting good purity b-jets samples useful for many physics measurements, the most important being inclusive H (yields) b(bar b) searches. We discuss the performances of the proposed b-tagging algorithm which must guarantee reasonable trigger rates at luminosity greater than 2 x 10(sup 32) cm(sup -2)s(sup -1) and provide high efficiency on H (yields) b(bar b) events.