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Search for baryon and lepton number violating decays of Ξ0 hyperons

Authors: BESIII Collaboration; Ablikim, M.; Achasov, M. N.; Adlarson, P.; Aliberti, R.; Amoroso, A.; An, M. R.; +194 Authors

Search for baryon and lepton number violating decays of Ξ0 hyperons

Abstract

Using $(1.0087\pm0.0044)\times10^{10}$ $J/\psi$ events collected by the BESIII detector at the BEPCII collider, we report the first search for the baryon and lepton number violating decays $\Xi^{0} \rightarrow K^{-} e^{+}$ with $\Delta(B-L)=0$ and $\Xi^{0} \rightarrow K^{+} e^{-}$ with $|\Delta(B-L)|=2$, where $B$ ($L$) is the baryon (lepton) number. While no signal is observed, the upper limits on the branching fractions of these two decays are set to $\mathcal B(\Xi^{0} \rightarrow K^{-} e^{+})<3.6\times10^{-6}$ and $\mathcal B(\Xi^{0} \rightarrow K^{+} e^{-})<1.9\times10^{-6}$ at the 90\% confidence level, respectively. These results offer a direct probe of baryon number violating interactions involving a strange quark.

Comment: 8 pages, 5 figures

Countries
Sweden, Netherlands, Germany, Italy, Italy
Subjects by Vocabulary

Dewey Decimal Classification: ddc:530

Keywords

Subatomär fysik, High Energy Physics - Experiment (hep-ex), Astronomi, astrofysik och kosmologi, Subatomic Physics, Astronomy, Astrophysics and Cosmology, FOS: Physical sciences, 530, NO, High Energy Physics - Experiment

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    0
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    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
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    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Funded by
EC| ONEDEGGAM
Project
ONEDEGGAM
The search for new physics through precision measurements of the CKM angle gamma
  • Funder: European Commission (EC)
  • Project Code: 758462
  • Funding stream: H2020 | ERC | ERC-STG
,
EC| Glueballs at BESIII
Project
Glueballs at BESIII
Search for the scalar glueball in a coupled channel amplitude analysis of J/psi decays with the BESIII experiment
  • Funder: European Commission (EC)
  • Project Code: 894790
  • Funding stream: H2020 | MSCA-IF-GF
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