Treatment of top-quark backgrounds in extreme phase spaces: the "top $p_{T}$ reweighting" and novel data-driven estimations in ATLAS and CMS
The top quark plays an important role in searches for physics beyond the SM, both as a dominant background and as a key signature for the signal. The most notable feature found in the top physics analyses in both ATLAS and CMS Collaborations: the disagreement between simulation and data of the top q...
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| Main Author | |
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| Format | Journal Article |
| Language | English |
| Published |
09.05.2021
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| Subjects | |
| Online Access | Get full text |
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| Summary: | The top quark plays an important role in searches for physics beyond the SM,
both as a dominant background and as a key signature for the signal. The most
notable feature found in the top physics analyses in both ATLAS and CMS
Collaborations: the disagreement between simulation and data of the top quark
$p_{T}$ spectrum - is highlighted. A reweighting procedure which significantly
improves the agreement between simulation and data, also known as the "top
$p_{T}$ reweighting", is summarised. Commonly raised points concerning the
reweighting to fixed-order predictions are discussed, and several refined
approaches are mentioned. An overview of several data-driven methods developed
and used to estimate the $t\bar{t}$ background in regions with large jet and
b-jet multiplicities and/or high top quark $p_{T}$ is presented. |
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| Bibliography: | ATL-PHYS-PROC-2021-016 |
| DOI: | 10.48550/arxiv.2105.03977 |