Triggering on hadronic tau decays in ATLAS: Semiconductor tracking detectors in action
نویسندگان
چکیده
منابع مشابه
ly Triggering on hadronic Tau Decays in ATLAS : 1 Algorithms and Performance
Hadronic tau decays play a crucial role in Standard Model measurements as well 6 as in the search for physics beyond the Standard Model by the ATLAS experiment at the Large 7 Hadron Collider (LHC). However, hadronic tau decays are difficult to identify and trigger on due 8 to their resemblance to QCD jets. Given the large production cross section of QCD processes, 9 designing and operating a tr...
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The presence of τ leptons in the final state is an important signature in many Higgs boson and SUSY searches. With the ATLAS detector, hadronically decaying τ leptons can be reconstructed in a wide range of transverse energies. The reconstruction algorithm for hadronically decaying τ leptons is explained and the performance of τ lepton identification is shown. Particularly important is the disc...
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When the τ lepton decays to 3 charged hadrons and a neutrino, the predominant decay mode involves three charged pions. Occasionally this decay will include one, two or three kaons in the final state. Each of these modes is useful for understanding different physics topics. The decay τ → Kππν is important in extracting the strange spectral function as well the strange quark mass and the CKM matr...
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The extensive tau physics programs of the ATLAS experiment relies heavily on trigger to select hadronic decays of tau lepton. Such a trigger is implemented in ATLAS to efficiently collect signal events, while keeping the rate of multi-jet background within the allowed bandwidth. This contribution summarizes the performance of the ATLAS hadronic tau trigger system during 2011 data taking period ...
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Unique among the leptons, the tau is massive enough to decay semi-hadronically. Many hadronic branching fractions are predicted with precision in the Standard Model, motivating correspondingly accurate measurements as probes of new physics. Tau decays also furnish a remarkably potent production source for mesons, the properties of which are then available for study. Although the internal incons...
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ژورنال
عنوان ژورنال: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
سال: 2013
ISSN: 0168-9002
DOI: 10.1016/j.nima.2012.05.039