We report the results of the first search for B- decays to the Ξ¯c0Λ¯c- final state using 711 fb-1 of data collected at the γ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The results are interpreted in terms of both direct baryon-number-violating B- decay and Ξc0-Ξ¯c0 oscillations which follow the standard model decay B-→Ξc0Λ¯c-. We observe no evidence for baryon number violation and set the 95% confidence-level upper limits on the ratio of baryon-number-violating and standard model branching fractions B(B-→Ξ¯c0Λ¯c-)/B(B-→Ξc0Λ¯c-) to be <2.7% and on the effective angular frequency of mixing ω in Ξc0-Ξ¯c0 oscillations to be <0.76 ps-1 (equivalent to τmix>1.3 ps).

Search for Baryon-Number-Violating Processes in B- Decays to the Ξ ¯ c0 Λ ¯ c- Final State / Gu, T., Savinov, V., Adachi, I., Aihara, H., Asner, D.M., Atmacan, H., Aushev, T., Ayad, R., Banerjee, S., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Biswas, D., Bobrov, A., Bodrov, D., Borah, J., Bozek, A., Bracko, M., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 133:7(2024). [10.1103/PhysRevLett.133.071802]

Search for Baryon-Number-Violating Processes in B- Decays to the Ξ ¯ c0 Λ ¯ c- Final State

Campajola M.;De Nardo G.;Di Capua F.;Merola M.;Pardi S.;Russo Guido;
2024

Abstract

We report the results of the first search for B- decays to the Ξ¯c0Λ¯c- final state using 711 fb-1 of data collected at the γ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The results are interpreted in terms of both direct baryon-number-violating B- decay and Ξc0-Ξ¯c0 oscillations which follow the standard model decay B-→Ξc0Λ¯c-. We observe no evidence for baryon number violation and set the 95% confidence-level upper limits on the ratio of baryon-number-violating and standard model branching fractions B(B-→Ξ¯c0Λ¯c-)/B(B-→Ξc0Λ¯c-) to be <2.7% and on the effective angular frequency of mixing ω in Ξc0-Ξ¯c0 oscillations to be <0.76 ps-1 (equivalent to τmix>1.3 ps).
2024
Search for Baryon-Number-Violating Processes in B- Decays to the Ξ ¯ c0 Λ ¯ c- Final State / Gu, T., Savinov, V., Adachi, I., Aihara, H., Asner, D.M., Atmacan, H., Aushev, T., Ayad, R., Banerjee, S., Belous, K., Bennett, J., Bessner, M., Bhardwaj, V., Bhuyan, B., Biswas, D., Bobrov, A., Bodrov, D., Borah, J., Bozek, A., Bracko, M., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 133:7(2024). [10.1103/PhysRevLett.133.071802]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/985089
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