Search for a ι+ ι - Resonance in e + e - → μ+ μ - ι+ ι - Events with the Belle II Experiment

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10476907" target="_blank" >RIV/00216208:11320/23:10476907 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_uibgI9CWS" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_uibgI9CWS</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.131.121802" target="_blank" >10.1103/PhysRevLett.131.121802</a>

Result language
angličtina
Original language name
Search for a ι+ ι - Resonance in e + e - → μ+ μ - ι+ ι - Events with the Belle II Experiment
Original language description
We report the first search for a nonstandard-model resonance decaying into t pairs in e(+) e(-) -> mu(+)mu(-) iota(+)iota(-) events in the 3.6-10 GeV/c(2) mass range. We use a 62.8 fb(-1) sample of e(+) e(-) collisions collected at a center-of-mass energy of 10.58 GeV by the Belle II experiment at the SuperKEKB collider. The analysis probes three different models predicting a spin-1 particle coupling only to the heavier lepton families, a Higgs-like spin-0 particle that couples preferentially to charged leptons (leptophilic scalar), and an axionlike particle, respectively. We observe no evidence for a signal and set exclusion limits at 90% confidence level on the product of cross section and branching fraction into t pairs, ranging from 0.7 to 24 fb, and on the couplings of these processes. We obtain world-leading constraints on the couplings for the leptophilic scalar model for masses above 6.5 GeV/c(2) and for the axionlike particle model over the entire mass range.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10300 - Physical sciences

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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