TAULEPGAMMA

Search for the Lepton Flavour Violating Decay Tau to Lepton + Gamma at the Belle II Experiment

Grant period2021-06-01 - 2023-05-31
Funding bodyEuropean Union
Call numberH2020-MSCA-IF-2020
Grant number101026516
IdentifierG:(EU-Grant)101026516

Note: I propose a measurement of the lepton flavour violating (LFV) tau -> lepton + gamma decay, where the lepton is a muon or an electron. This will be carried out at the University of Pisa (Italy) under the supervision of Prof. Francesco Forti. Although highly successful, the Standard Model (SM) of particle physics does not completely describe all the phenomena we observe, such as the recent discovery of neutrino oscillations which violate lepton flavour conservation in the neutral sector. Many scenarios have been advanced to extend the SM into a bigger picture; several of these models predict LFV to occur in the charged sector as well at measurable rates. I will exploit the unprecedented data sample provided by the Belle II experiment at SuperKEKB to measure the tau -> lepton + gamma decay rate with a sensitivity of at least a factor of four greater than any previous measurement. In order to achieve this result I will develop an advanced physics analysis, making full use of the characteristics of the state-of-the-art Belle II detector and incorporating modern techniques such as machine learning. I will use my experience in physics analysis, preparatory studies and detector performance measurements to make this possible. The impact of a measurement of such sensitivity would be tremendous. A discovery of charged LFV would constitute an enormous breakthrough which would spark a new era of particle physics; a non-observation would instead place strong constraints on possible extensions of the SM and inform physics studies for the coming decade.
   

Recent Publications

All known publications ...
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http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article  ;  ;  ; et al
Search for lepton-flavor-violating ${\tau }^{-}\to {{\ell}}^{-}{K}_{s}^{0}$ decays at Belle and Belle II
Journal of high energy physics 08(8), 092 () [10.1007/JHEP08(2025)092]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article  ;  ;  ; et al
Measurement of the time-integrated $CP$ asymmetry in $D^0\to\pi^0\pi^0$ decays at Belle II
Physical review / D 112(1), 012006 () [10.1103/vg9c-xvdc]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article  ;  ;  ; et al
Measurement of the time-integrated $CP$ asymmetry in $D^0 \to K^0_{\rm S} K^0_{\rm S}$ decays using opposite-side flavor tagging at Belle and Belle II
Physical review / D 112(1), 012017 () [10.1103/8x1h-39dp]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article  ;  ;  ; et al
Evidence of the P$_{c\bar{c}s}$(4459)$^0$ in Upsilon(1S, 2S) inclusive decays at Belle
Physical review letters 135, 041901 () [10.1103/pf8m-6j69]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint  ;  ;  ; et al
Measurement of the $ D^{0}\rightarrow K^{-}π^{+}e^{+}e^{-} $ branching fraction and search for $ D^{0}\rightarrow π^{+}π^{-}e^{+}e^{-} $ and $D^{0}\rightarrow K^{+}K^{-}e^{+}e^{-} $ decays at Belle
[10.3204/PUBDB-2025-03732]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint  ;  ;  ; et al
Search for the lepton-flavor-violating $τ^{-} \rightarrow e^{\mp} \ell^{\pm} \ell^{\mp}$ decays at Belle II
[10.3204/PUBDB-2025-03731]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint  ;  ;  ; et al
A model-agnostic likelihood for the reinterpretation of the $\boldsymbol{B^{+}\to K^{+} ν\barν}$ measurement at Belle II
[10.3204/PUBDB-2025-03730]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint  ;  ;  ; et al
Observation of the decays $B^{+} \to Σ_{c}(2455)^{++} \overlineΞ_{c}^{-}$ and $B^{0} \to Σ_{c}(2455)^{0} \overlineΞ_{c}^{0}$
[10.3204/PUBDB-2025-03728]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint  ;  ;  ; et al
Charged-hadron identification at Belle II
[10.3204/PUBDB-2025-03726]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint  ;  ;  ; et al
Determination of $|V_{cb}|$ using $B\to D\ellν_\ell$ Decays at Belle II
[10.3204/PUBDB-2025-01933]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

All known publications ...
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 Record created 2021-10-11, last modified 2023-02-12



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