Search for the semi-leptonic decays <math altimg="si1.svg"><msubsup><mrow><mi mathvariant="normal">Λ</mi></mrow><mrow><mi>c</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msubsup><mo stretchy="false">→</mo><mi mathvariant="normal">Λ</mi><msup><mrow><mi>π</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">−</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup><msub><mrow><mi>ν</mi></mrow><mrow><mi>e</mi></mrow></msub></math> and <math altimg="si2.svg"><msubsup><mrow><mi mathvariant="normal">Λ</mi></mrow><mrow><mi>c</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msubsup><mo stretchy="false">→</mo><mi>p</mi><msubsup><mrow><mi>K</mi></mrow><mrow><mi>S</mi></mrow><mrow><mn>0</mn></mrow></msubsup><msup><mrow><mi>π</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">−</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup><msub><mrow><mi>ν</mi></mrow><mrow><mi>e</mi></mrow></msub></math>

Ablikim, Medina; Achasov, Mikhail N.; Adlarson, Patrik Adlarsson; Aliberti, Riccardo; Amoroso, Antonio; An, Meiru; An, Qi; Bai, Yu; Bakina, Olga; Balossino, Ilaria

doi:10.1016/j.physletb.2023.137993

Search for the semi-leptonic decays $Λ_{c}^{+} \to Λ π^{+} π^{-} e^{+} ν_{e}$ and $Λ_{c}^{+} \to p K_{S}^{0} π^{-} e^{+} ν_{e}$

BESIII

Collaboration

Feb 15, 2023

11 pages

Published in:

Phys.Lett.B 843 (2023) 137993

Published: Jun 7, 2023

e-Print:

2302.07529 [hep-ex]

DOI:

10.1016/j.physletb.2023.137993 (publication)

PDG:

{{\mathit \Lambda}_{{{c}}}^{+}}

\rightarrow

{{\mathit \Lambda}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}

Experiments:

BEPC-BES-III

View in:

ADS Abstract Service

pdf

reference search4 citations

Citations per year

Abstract: (Elsevier B.V.)

We search for the semi-leptonic decays

Λ_{c}^{+} \to Λ π^{+} π^{-} e^{+} ν_{e}

and

Λ_{c}^{+} \to p K_{S}^{0} π^{-} e^{+} ν_{e}

in a sample of 4.5

{fb}^{- 1}

of

e^{+} e^{-}

annihilation data collected in the center-of-mass energy region between 4.600GeV and 4.699GeV by the BESIII detector at the BEPCII. No significant signals are observed, and the upper limits on the decay branching fractions are set to be

B (Λ_{c}^{+} \to Λ π^{+} π^{-} e^{+} ν_{e}) < 3.9 \times 10^{- 4}

and

B (Λ_{c}^{+} \to p K_{S}^{0} π^{-} e^{+} ν_{e}) < 3.3 \times 10^{- 4}

at the 90% confidence level, respectively.

Note:

11 pages, 3 figures

BESIII
baryon
Semi-leptonic decays
Branching fractions
electron positron: annihilation
electron positron: colliding beams
Lambda/c+: semileptonic decay
BES
Beijing Stor
Lambda/c+: branching ratio: upper limit

References(42)

Figures(6)

[1]

CP Violation in the Renormalizable Theory of Weak Interaction

Makoto Kobayashi
(
- Kyoto U.
)
,
Toshihide Maskawa
(
- Kyoto U.
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- Also in *Lichtenberg, D. B. (Ed.), Rosen, S. P. (Ed.): Developments In The Quark Theory Of Hadrons, Vol. 1*, 218-223.
•
DOI:
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