Anomalous triple gauge couplings in $e^-e^+\to 4j$: Role of polarizations, spin correlations and interference

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Autori principali:	Subba, Amir, Singh, Ritesh K.
Natura:	Preprint
Pubblicazione:	2024
Soggetti:	High Energy Physics - Phenomenology
Accesso online:	Acceder al recurso
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author	Subba, Amir Singh, Ritesh K.
author_facet	Subba, Amir Singh, Ritesh K.
contents	We investigate the anomalous charged triple gauge boson couplings generated via $SU(2)_l\times U(1)_Y$ gauge invariant dimension-6 operators with final state four jet events in an $e^-e^+$ Collider at $\sqrt{s}=250$~GeV. We consider all the leading order contributions including the contribution from the interference of $W^-W^+$ diagrams with other possible diagrams. The tagging of two $W$ bosons with a pair of jets is done using the jet charge, while the decay products of $W^\prime$s are tagged as \emph{up/down}-type using boosted decision trees to construct polarizations and spin correlations. Marginalized limits on five anomalous couplings are obtained by Markov Chain Monte Carlo analysis using polarizations, spin correlations, and cross~section. We found that the full-hadronic channel provides tighter limits on anomalous couplings than compared to the usually sought-after clean semi-leptonic channel, owing to the large contribution from interference.
format	Preprint
id	arxiv_https___arxiv_org_abs_2407_01322
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Anomalous triple gauge couplings in $e^-e^+\to 4j$: Role of polarizations, spin correlations and interference Subba, Amir Singh, Ritesh K. High Energy Physics - Phenomenology We investigate the anomalous charged triple gauge boson couplings generated via $SU(2)_l\times U(1)_Y$ gauge invariant dimension-6 operators with final state four jet events in an $e^-e^+$ Collider at $\sqrt{s}=250$~GeV. We consider all the leading order contributions including the contribution from the interference of $W^-W^+$ diagrams with other possible diagrams. The tagging of two $W$ bosons with a pair of jets is done using the jet charge, while the decay products of $W^\prime$s are tagged as \emph{up/down}-type using boosted decision trees to construct polarizations and spin correlations. Marginalized limits on five anomalous couplings are obtained by Markov Chain Monte Carlo analysis using polarizations, spin correlations, and cross~section. We found that the full-hadronic channel provides tighter limits on anomalous couplings than compared to the usually sought-after clean semi-leptonic channel, owing to the large contribution from interference.
title	Anomalous triple gauge couplings in $e^-e^+\to 4j$: Role of polarizations, spin correlations and interference
topic	High Energy Physics - Phenomenology
url	https://arxiv.org/abs/2407.01322

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