Record #465984 - PUBDB

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InterLeptons

A search for new interactions at Belle II using leptons

Grant period	2020-11-01 - 2025-10-31
Funding body	European Union
Call number	ERC-2020-STG
Grant number	947006
Identifier	G:(EU-Grant)947006

Note: Several measurements in the quark and in the lepton flavor sectors have shown anomalies with respect to the standard model expectations and are now referred to as flavor anomalies. The Belle II experiment at the Super-KEKB laboratory in Japan is collecting data by colliding beams of electrons and positrons. The aim of this proposal is to look for physics beyond the standard model at the Belle II experiment by a) searching for the direct production of new light particles, and b) looking for deviations from theoretical predictions when performing precision tests of the standard model. The team will analyse events with leptons and large missing energy in the final states and implement the most advanced analysis techniques including, for the first time, deep learning tools in the identification of signals at the Belle II experiment. First, we will search for invisible decays of a dark Z' boson, a hypothetical particle that might also explain the anomaly reported in the anomalous magnetic moment of the muon. Second, we will test with per mille precision lepton flavor universality by studying leptonic decays of the tau lepton and use the results to constrain new physics models such as those containing a lepton flavor violating Z' boson. Finally, we will search for new physics via lepton flavor violating decays of bottomonium resonances produced in initial state radiation events that, thanks also to an effective field theory approach, will allow us to interpret the search in terms of new physics mass scale and coupling constant, with an approach complementary to that of the LHC.

European Comission

Recent Publications

All known publications ...
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Preprint Abumusabh, M. ; Adachi, I. ; Aggarwal, A. ; et al
First evidence of $X(3872)\toπ^0χ_{c0}(1P)$ and search for $X(3915)\toπ^0χ_{c1}(1P)$
arXiv Files Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

Preprint Abumusabh, M. ; Adachi, I. ; Adamczyk, K. M. ; et al
Measurement of mixing-induced CP violation in the decay $B^0 \to π^0 π^0$
[10.3204/PUBDB-2026-01914] OpenAccess Files Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

Preprint Abumusabh, M. ; Adachi, I. ; Aggarwal, A. ; et al
Search for $Ξ^0p$, $Ω^- p$, and $Ω^- n$ dibaryons in $Υ(1S)$ and $Υ(2S)$ decays at Belle
[10.3204/PUBDB-2026-01755] OpenAccess Files Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

Preprint Abumusabh, M. ; Adachi, I. ; Aggarwal, A. ; et al
Measurement of time-dependent $CP$ violation parameters in $B^{0} \to K_{S}^{0} π^{0} γ$ decays at Belle and Belle II
[10.3204/PUBDB-2026-01754] OpenAccess Files Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

Journal Article Adachi, I. ; Aggarwal, L. ; Ahmed, H.Extern* ; et al
Observation of $e^+e^-\to \eta \Upsilon(2S)$ and search for $e^+e^-\to \eta \Upsilon(1S), \gamma X_b$ at $\sqrt{s}$ near 10.75 GeV
Physical review / D 113(5), L051102 (2026) [10.1103/9f61-rmvx]2026 OpenAccess Files Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

Journal Article Adachi, I. ; Aggarwal, L. ; Ahmed, H.Extern* ; et al
Improved measurement of Born cross sections for χ$_{bJ}$ω and χ$_{bJ}$ (π$^{+}$π$^{−}$π$^{0}$)$_{non−ω}$ (J = 0, 1, 2) at Belle and Belle II
Journal of high energy physics 04(4), 101 (2026) [10.1007/JHEP04(2026)101]2026 OpenAccess Files Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

Journal Article Abumusabh, M. ; Adachi, I. ; Aggarwal, L. ; et al
Measurement of the $CP$ asymmetry in $D^0\toπ^+π^-π^0$ decays at Belle II
Physical review / D 113(5), 052006 (2026) [10.1103/4yv7-1h85]2026 OpenAccess Files Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

Journal Article Abumusabh, M. ; Adachi, I. ; Ahmed, H.Extern* ; et al
Search for $CP$ violation in $Ξ_c^+\toΣ^+h^+h^-$ and $Λ_c^+\to ph^+h^-$ at Belle II
Physical review / D 113(3), 032017 (2026) [10.1103/s2gy-c3vh]2026 OpenAccess Files Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

Journal Article Abumusabh, M. ; Adachi, I. ; Aggarwal, L. ; et al
Search for $e^{+} e^{-} \rightarrow \gamma \chi_{b J}$ $(J = 0, 1, 2)$ near $\sqrt{s}=10.746~\text{GeV}$ at Belle II
Physical review / D 113(5), 052009 (2026) [10.1103/2rv3-s3w7]2026 OpenAccess Files Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

Preprint Abumusabh, M. ; Adachi, I. ; Aggarwal, A. ; et al
Study of $e^+e^- \to π^+π^-Υ(1D)$ at Belle II
arXiv Files Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

All known publications ...
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Record created 2021-10-11, last modified 2023-02-10

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