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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2007, vol. 75, p. -

Search for B0→pp̄, ΛΛ̄ and B+→pΛ̄ at Belle

Tsai Y. T., Chang P., Abe K., Adachi I., Aihara H., Anipko D., Bakich A. M., Bitenc U., Bizjak I., Blyth S., Bračko M., Browder T. E., Chang M. C., Chao Y., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Cole S., Dalseno J., Danilov M., Dash M., Dragic J., Drutskoy A., Eidelman S., Fratina S., Gabyshev N., Ha H., Haba J., Hayashii H., Hazumi M., Heffernan D., Hoshi Y., Hou W. S., Hsiung Y. B., Iijima T., Ikado K., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kawai H., Kichimi H., Kim H. J., Kim H. O., Kinoshita K., Korpar S., Križan P., Krokovny P., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. J., Lee M. J., Lee Y. J., Lesiak T., Limosani A., Lin S. W., Liventsev D., Matsumoto T., McOnie S., Medvedeva T., Mitaroff W., Miyata H., Miyazaki Y., Moloney G. R., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Ogawa S., Ohshima T., Okuno S., Onuki Y., Ozaki H., Pakhlov P., Pakhlova G., Piilonen L. E., Sakai Y., Satoyama N., Schietinger T., Schneider O., Schümann J., Senyo K., Sevior M. E., Shapkin M., Shibuya H., Singh J. B., Somov A., Starič M., Stoeck H.

We report on a new search for two-body baryonic decays of the B meson. Improved sensitivity compared to previous Belle results is obtained from 414fb-1 of data that corresponds to 449×106 BB̄ pairs, which were taken on the Υ(4S) resonance and collected with the Belle detector at the KEKB e+e- collider. No significant signals are observed and we set the 90% confidence level upper limits: B(B0→pp̄)<1.1×10-7, B(B0→Λ Λ̄)<3.2×10-7, and B(B+→pΛ̄)<3. 2×10-7. © 2007 The American Physical Society.