Search for lepton-number-violating B + → D − ℓ + ℓ ′ + decays

Search for lepton-number-violating B + → D − ℓ + ℓ ′ + decays

We perform the first search for lepton-number-violating B+ D-ℓ+ℓ'+ decays, where ℓ and ℓ' stand for e or μ, using 772×106 B ¯B pairs accumulated at the (4S) resonance with the Belle detector at the KEKB e+e- collider. No evidence for these decays has been found. Assuming uniform three-body...

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Veröffentlicht in:Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2011-10, Vol.84 (7), Article 071106
Hauptverfasser: Seon, O., Kwon, Y.-J., Iijima, T., Adachi, I., Aihara, H., Asner, D. M., Aushev, T., Bakich, A. M., Barberio, E., Bay, A., Bhardwaj, V., Bhuyan, B., Bischofberger, M., Bondar, A., Bozek, A., Bračko, M., Brodzicka, J., Brovchenko, O., Browder, T. E., Chang, P., Chen, A., Chen, P., Cheon, B. G., Chilikin, K., Cho, I.-S., Cho, K., Choi, S.-K., Choi, Y., Dalseno, J., Doležal, Z., Drutskoy, A., Eidelman, S., Fast, J. E., Gaur, V., Gabyshev, N., Goh, Y. M., Golob, B., Haba, J., Hara, K., Hara, T., Hayasaka, K., Hayashii, H., Horii, Y., Hoshi, Y., Hou, W.-S., Hsiung, Y. B., Hyun, H. J., Inami, K., Ishikawa, A., Itoh, R., Iwabuchi, M., Iwasaki, Y., Iwashita, T., Joshi, N. J., Julius, T., Kang, J. H., Katayama, N., Kawasaki, T., Kichimi, H., Kim, H. J., Kim, H. O., Kim, J. B., Kim, J. H., Kim, K. T., Kim, M. J., Kim, S. K., Kim, Y. J., Kinoshita, K., Ko, B. R., Kobayashi, N., Koblitz, S., Kodyš, P., Korpar, S., Križan, P., Kuhr, T., Kumita, T., Kuzmin, A., Kyeong, S.-H., Lange, J. S., Lee, M. J., Lee, S.-H., Li, J., Li, Y., Libby, J., Lim, C.-L., Liu, C., Liu, Y., Liventsev, D., Louvot, R., McOnie, S., Miyabayashi, K., Miyata, H., Miyazaki, Y., Mizuk, R., Mohanty, G. B., Nagasaka, Y., Nakano, E., Nakao, M., Nakazawa, H., Natkaniec, Z.
Format: Artikel
Sprache:eng
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BRANCHING RATIO
Environmental Molecular Sciences Laboratory
LEPTON NUMBER
LEPTONIC DECAY
PHASE SPACE
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
RESONANCE
Search for Lepton-number-violating B+ D−ℓ+ℓ′+ Decays
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Zusammenfassung:We perform the first search for lepton-number-violating B+ D-ℓ+ℓ'+ decays, where ℓ and ℓ' stand for e or μ, using 772×106 B ¯B pairs accumulated at the (4S) resonance with the Belle detector at the KEKB e+e- collider. No evidence for these decays has been found. Assuming uniform three-body phase space distributions for the D-ℓ+ℓ'+ decays, we set the following upper limits on the branching fractions at 90% confidence level: B(B+ D-e+e+) < 2.6×10-6, B(B+ D-e+μ+) < 1.8 × 10-6 and B(B+ D-μ+μ+) < 1.0 × 10-6.
ISSN:1550-7998
1550-2368
DOI:10.1103/PhysRevD.84.071106