Boosting the standard model Higgs signal with the Template Overlap Method
| Autor: | Gilad Perez, Mihailo Backović, José Juknevich |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Boosting (machine learning) Subtraction FOS: Physical sciences Observable High Energy Physics - Experiment High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Phase space Higgs boson Planar flow Template based Algorithm Particle Physics - Phenomenology Template method pattern |
| Zdroj: | Journal of High Energy Physics. 2013 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/jhep07(2013)114 |
| Popis: | We show that the Template Overlap Method can improve the signal to background ratio of boosted $H\to b \bar b$ events produced in association with a leptonically decaying $W$. We introduce several improvements on the previous formulations of the template method. Varying three-particle template subcones increases the rejection power against the backgrounds, while sequential template generation ensures an efficient coverage in template phase space. We integrate b-tagging information into the template overlap framework and introduce a new template based observable, the template stretch. Our analysis takes into account the contamination from the charm daughters of top decays in $t\bar t$ events, and includes nearly-realistic effects of pileup and underlying events. We show that the Template Overlap Method displays very low sensitivity to pileup, hence providing a self-contained alternative to other methods of pile up subtraction. The developments described in this work are quite general, and may apply to other searches for massive boosted objects. 28 pages, 35 figures; references added, minor revisions, to appear in JHEP |
| Databáze: | OpenAIRE |
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