Sparks in the Dark
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866916658457608192 |
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| author | Gudnadottir, Olga Sunneborn Gallén, Axel Ripellino, Giulia Heinrich, Jochen Jens Sainudiin, Raazesh Suarez, Rebeca Gonzalez |
| author_facet | Gudnadottir, Olga Sunneborn Gallén, Axel Ripellino, Giulia Heinrich, Jochen Jens Sainudiin, Raazesh Suarez, Rebeca Gonzalez |
| contents | This study presents a novel method for the definition of signal regions in searches for new physics at collider experiments, specifically those conducted at CERNs Large Hadron Collider. By leveraging multi-dimensional histograms with precise arithmetic and utilizing the SparkDensityTree library, it is possible to identify high-density regions within the available phase space, potentially improving sensitivity to very small signals. Inspired by an ongoing search for dark mesons at the ATLAS experiment, CMS open data is used for this proof-of-concept intentionally targeting an already excluded signal. Several signal regions are defined based on density estimates of signal and background. These preliminary regions align well with the physical properties of the signal while effectively rejecting background events. While not explored in this work, this method is also scalable, which makes it ideal for large datasets such as those expected at the high-luminosity upgrade of the LHC. Finally, this method is flexible and can be easily extended, promising a boost to the signal region definition process for new physics searches at colliders. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_04138 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Sparks in the Dark Gudnadottir, Olga Sunneborn Gallén, Axel Ripellino, Giulia Heinrich, Jochen Jens Sainudiin, Raazesh Suarez, Rebeca Gonzalez High Energy Physics - Experiment Data Analysis, Statistics and Probability This study presents a novel method for the definition of signal regions in searches for new physics at collider experiments, specifically those conducted at CERNs Large Hadron Collider. By leveraging multi-dimensional histograms with precise arithmetic and utilizing the SparkDensityTree library, it is possible to identify high-density regions within the available phase space, potentially improving sensitivity to very small signals. Inspired by an ongoing search for dark mesons at the ATLAS experiment, CMS open data is used for this proof-of-concept intentionally targeting an already excluded signal. Several signal regions are defined based on density estimates of signal and background. These preliminary regions align well with the physical properties of the signal while effectively rejecting background events. While not explored in this work, this method is also scalable, which makes it ideal for large datasets such as those expected at the high-luminosity upgrade of the LHC. Finally, this method is flexible and can be easily extended, promising a boost to the signal region definition process for new physics searches at colliders. |
| title | Sparks in the Dark |
| topic | High Energy Physics - Experiment Data Analysis, Statistics and Probability |
| url | https://arxiv.org/abs/2404.04138 |