We present the first search for the weak radiative decays Λc+→ς+γ and Ξc0→Ξ0γ using a data sample of 980 fb-1 collected by the Belle detector operating at the KEKB asymmetric-energy e+e- collider. There are no evident Λc+→ς+γ or Ξc0→Ξ0γ signals. Taking the decays Λc+→pK-π+ and Ξc0→Ξ-π+ as normalization channels, the upper limits at 90% credibility level on the ratios of branching fractions B(Λc+→ς+γ)/B(Λc+→pK-π+)<4.0×10-3 and B(Ξc0→Ξ0γ)/B(Ξc0→Ξ-π+)<1.2×10-2 are determined. We obtain the upper limits at 90% credibility level on the absolute branching fractions B(Λc+→ς+γ)<2.6×10-4 and B(Ξc0→Ξ0γ)<1.8×10-4.

First search for the weak radiative decays Λc+ → ς+γ and Ξc0 → Ξ0γ / Li, Y., Shen, C.P., Adachi, I., Aihara, H., Asner, D.M., Aulchenko, V., Aushev, T., Babu, V., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 107:3(2023). [10.1103/PhysRevD.107.032001]

First search for the weak radiative decays Λc+ → ς+γ and Ξc0 → Ξ0γ

Campajola M.;Di Capua F.;Merola M.;Pardi S.;Russo Guido;
2023

Abstract

We present the first search for the weak radiative decays Λc+→ς+γ and Ξc0→Ξ0γ using a data sample of 980 fb-1 collected by the Belle detector operating at the KEKB asymmetric-energy e+e- collider. There are no evident Λc+→ς+γ or Ξc0→Ξ0γ signals. Taking the decays Λc+→pK-π+ and Ξc0→Ξ-π+ as normalization channels, the upper limits at 90% credibility level on the ratios of branching fractions B(Λc+→ς+γ)/B(Λc+→pK-π+)<4.0×10-3 and B(Ξc0→Ξ0γ)/B(Ξc0→Ξ-π+)<1.2×10-2 are determined. We obtain the upper limits at 90% credibility level on the absolute branching fractions B(Λc+→ς+γ)<2.6×10-4 and B(Ξc0→Ξ0γ)<1.8×10-4.
2023
First search for the weak radiative decays Λc+ → ς+γ and Ξc0 → Ξ0γ / Li, Y., Shen, C.P., Adachi, I., Aihara, H., Asner, D.M., Aulchenko, V., Aushev, T., Babu, V., Behera, P., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Bilka, T., Bobrov, A., Bodrov, D., Bonvicini, G., Borah, J., Bozek, A., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 107:3(2023). [10.1103/PhysRevD.107.032001]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/968972
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