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Model-independent approach for incorporating interference effects in collider searches for new resonances
The presence of large-mass resonances in the data collected at the Large Hadron Collider would provide direct evidence of physics beyond the Standard Model. A key challenge in current resonance searches at the LHC is the modelling of signal–background interference effects, which can severely distort...
Autores principales: | , , , , , |
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Lenguaje: | eng |
Publicado: |
2020
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1140/epjc/s10052-020-08763-5 http://cds.cern.ch/record/2729613 |
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author | Frixione, Stefano Roos, Lydia Ting, Edmund Vryonidou, Eleni White, Martin Williams, Anthony G. |
author_facet | Frixione, Stefano Roos, Lydia Ting, Edmund Vryonidou, Eleni White, Martin Williams, Anthony G. |
author_sort | Frixione, Stefano |
collection | CERN |
description | The presence of large-mass resonances in the data collected at the Large Hadron Collider would provide direct evidence of physics beyond the Standard Model. A key challenge in current resonance searches at the LHC is the modelling of signal–background interference effects, which can severely distort the shape of the reconstructed invariant mass distribution relative to the case where there is no interference. Such effects are strongly dependent on the beyond the Standard Model theory that must be considered as unknown if one aims to minimise any theoretical bias on the search results. In this paper, we describe a procedure which employs a physically-motivated, model-independent template functional form that can be used to model interference effects, both for the characterisation of positive discoveries, and in the presentation of null results. We illustrate the approach with the example of a scalar resonance decaying into a pair of photons. |
id | cern-2729613 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2020 |
record_format | invenio |
spelling | cern-27296132021-11-13T10:57:20Zdoi:10.1140/epjc/s10052-020-08763-5http://cds.cern.ch/record/2729613engFrixione, StefanoRoos, LydiaTing, EdmundVryonidou, EleniWhite, MartinWilliams, Anthony G.Model-independent approach for incorporating interference effects in collider searches for new resonanceshep-phParticle Physics - PhenomenologyThe presence of large-mass resonances in the data collected at the Large Hadron Collider would provide direct evidence of physics beyond the Standard Model. A key challenge in current resonance searches at the LHC is the modelling of signal–background interference effects, which can severely distort the shape of the reconstructed invariant mass distribution relative to the case where there is no interference. Such effects are strongly dependent on the beyond the Standard Model theory that must be considered as unknown if one aims to minimise any theoretical bias on the search results. In this paper, we describe a procedure which employs a physically-motivated, model-independent template functional form that can be used to model interference effects, both for the characterisation of positive discoveries, and in the presentation of null results. We illustrate the approach with the example of a scalar resonance decaying into a pair of photons.The presence of large-mass resonances in the data collected at the Large Hadron Collider would provide direct evidence of physics beyond the Standard Model. A key challenge in current resonance searches at the LHC is the modelling of signal--background interference effects, which can severely distort the shape of the reconstructed invariant mass distribution relative to the case where there is no interference. Such effects are strongly dependent on the beyond the Standard Model theory that must be considered as unknown if one aims to minimise any theoretical bias on the search results. In this paper, we describe a procedure which employs a physically-motivated, model-independent template functional form that can be used to model interference effects, both for the characterisation of positive discoveries, and in the presentation of null results. We illustrate the approach with the example of a scalar resonance decaying into a pair of photons.arXiv:2008.07751ADP-20-17/T1127; CERN-TH-2020-124oai:cds.cern.ch:27296132020-08-18 |
spellingShingle | hep-ph Particle Physics - Phenomenology Frixione, Stefano Roos, Lydia Ting, Edmund Vryonidou, Eleni White, Martin Williams, Anthony G. Model-independent approach for incorporating interference effects in collider searches for new resonances |
title | Model-independent approach for incorporating interference effects in collider searches for new resonances |
title_full | Model-independent approach for incorporating interference effects in collider searches for new resonances |
title_fullStr | Model-independent approach for incorporating interference effects in collider searches for new resonances |
title_full_unstemmed | Model-independent approach for incorporating interference effects in collider searches for new resonances |
title_short | Model-independent approach for incorporating interference effects in collider searches for new resonances |
title_sort | model-independent approach for incorporating interference effects in collider searches for new resonances |
topic | hep-ph Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1140/epjc/s10052-020-08763-5 http://cds.cern.ch/record/2729613 |
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