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Title: Measurement of the decays B η ν and B η ' ν in fully reconstructed events at Belle

Abstract

We report branching fraction measurements of the decays B + → ηℓ +νℓ and B + → η'ℓ +νℓ based on 711 fb –1 of data collected near the Υ(4S) resonance with the Belle experiment at the KEKB asymmetric-energy e +e collider. This data sample contains 772 million BB¯ events. One of the two B mesons is fully reconstructed in a hadronic decay mode. Among the remaining (“signal-B”) daughters, we search for the η meson in two decay channels, η → γγ and η → π +π π 0, and reconstruct the η' meson in η' → ηπ +π with subsequent decay of the η into γγ. Combining the two η modes and using an extended maximum likelihood, the B + → ηℓ +νℓ branching fraction is measured to be (4.2 ± 1.1(stat.) ± 0.3(syst.)) × 10 –5. For B + → η'ℓ +νℓ, we observe no significant signal and set an upper limit of 0.72 × 10 –4 at 90% confidence level.

Authors:
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Publication Date:
Research Org.:
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
[Belle Collaboration]
OSTI Identifier:
1594348
Alternate Identifier(s):
OSTI ID: 1410482
Grant/Contract Number:  
[SC0009973]
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
[ Journal Volume: 96; Journal Issue: 9]; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Branching fraction; Leptonic semileptonic & radiative decays; Particle decays; Bottom mesons; Leptons; Light mesons; Lepton colliders; Precision measurements

Citation Formats

Beleño, C., Dingfelder, J., Urquijo, P., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Badhrees, I., Bakich, A. M., Bansal, V., Behera, P., Bhuyan, B., Biswal, J., Bobrov, A., Bračko, M., Browder, T. E., Červenkov, D., Chen, A., Cheon, B. G., Chistov, R., Cho, K., Choi, S. -K., Choi, Y., Cinabro, D., Dash, N., Di Carlo, S., Doležal, Z., Eidelman, S., Farhat, H., Fast, J. E., Ferber, T., Frey, A., Fulsom, B. G., Gaur, V., Gabyshev, N., Garmash, A., Gillard, R., Goldenzweig, P., Hara, T., Hayashii, H., Hedges, M. T., Hou, W. -S., Iijima, T., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, Y., Jeon, H. B., Jin, Y., Joffe, D., Joo, K. K., Kang, K. H., Karyan, G., Kim, D. Y., Kim, J. B., Kim, K. T., Kim, M. J., Kim, Y. J., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Krokovny, P., Kulasiri, R., Lee, I. S., Li, Y., Li Gioi, L., Libby, J., Liventsev, D., Lubej, M., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Miyabayashi, K., Miyata, H., Moon, H. K., Mori, T., Nakano, E., Nakao, M., Nanut, T., Nath, K. J., Nayak, M., Nishida, S., Ogawa, S., Okuno, S., Ono, H., Pal, B., Park, C. -S., Park, C. W., Park, H., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Ritter, M., Sakai, Y., Salehi, M., Sandilya, S., Sanuki, T., Schneider, O., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Seon, O., Sevior, M. E., Shebalin, V., Shibata, T. -A., Shiu, J. -G., Simon, F., Solovieva, E., Starič, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, S., Usov, Y., Van Hulse, C., Varner, G., Varvell, K. E., Vinokurova, A., Vorobyev, V., Wang, C. H., Wang, M. -Z., Wang, P., Watanabe, Y., Widmann, E., Won, E., Yamashita, Y., Ye, H., Yelton, J., Yook, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., Zhulanov, V., and Zupanc, A. Measurement of the decays B→ηℓνℓ and B→η'ℓνℓ in fully reconstructed events at Belle. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.091102.
Beleño, C., Dingfelder, J., Urquijo, P., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Badhrees, I., Bakich, A. M., Bansal, V., Behera, P., Bhuyan, B., Biswal, J., Bobrov, A., Bračko, M., Browder, T. E., Červenkov, D., Chen, A., Cheon, B. G., Chistov, R., Cho, K., Choi, S. -K., Choi, Y., Cinabro, D., Dash, N., Di Carlo, S., Doležal, Z., Eidelman, S., Farhat, H., Fast, J. E., Ferber, T., Frey, A., Fulsom, B. G., Gaur, V., Gabyshev, N., Garmash, A., Gillard, R., Goldenzweig, P., Hara, T., Hayashii, H., Hedges, M. T., Hou, W. -S., Iijima, T., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, Y., Jeon, H. B., Jin, Y., Joffe, D., Joo, K. K., Kang, K. H., Karyan, G., Kim, D. Y., Kim, J. B., Kim, K. T., Kim, M. J., Kim, Y. J., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Krokovny, P., Kulasiri, R., Lee, I. S., Li, Y., Li Gioi, L., Libby, J., Liventsev, D., Lubej, M., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Miyabayashi, K., Miyata, H., Moon, H. K., Mori, T., Nakano, E., Nakao, M., Nanut, T., Nath, K. J., Nayak, M., Nishida, S., Ogawa, S., Okuno, S., Ono, H., Pal, B., Park, C. -S., Park, C. W., Park, H., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Ritter, M., Sakai, Y., Salehi, M., Sandilya, S., Sanuki, T., Schneider, O., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Seon, O., Sevior, M. E., Shebalin, V., Shibata, T. -A., Shiu, J. -G., Simon, F., Solovieva, E., Starič, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, S., Usov, Y., Van Hulse, C., Varner, G., Varvell, K. E., Vinokurova, A., Vorobyev, V., Wang, C. H., Wang, M. -Z., Wang, P., Watanabe, Y., Widmann, E., Won, E., Yamashita, Y., Ye, H., Yelton, J., Yook, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., Zhulanov, V., & Zupanc, A. Measurement of the decays B→ηℓνℓ and B→η'ℓνℓ in fully reconstructed events at Belle. United States. doi:10.1103/PhysRevD.96.091102.
Beleño, C., Dingfelder, J., Urquijo, P., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Badhrees, I., Bakich, A. M., Bansal, V., Behera, P., Bhuyan, B., Biswal, J., Bobrov, A., Bračko, M., Browder, T. E., Červenkov, D., Chen, A., Cheon, B. G., Chistov, R., Cho, K., Choi, S. -K., Choi, Y., Cinabro, D., Dash, N., Di Carlo, S., Doležal, Z., Eidelman, S., Farhat, H., Fast, J. E., Ferber, T., Frey, A., Fulsom, B. G., Gaur, V., Gabyshev, N., Garmash, A., Gillard, R., Goldenzweig, P., Hara, T., Hayashii, H., Hedges, M. T., Hou, W. -S., Iijima, T., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, Y., Jeon, H. B., Jin, Y., Joffe, D., Joo, K. K., Kang, K. H., Karyan, G., Kim, D. Y., Kim, J. B., Kim, K. T., Kim, M. J., Kim, Y. J., Kinoshita, K., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Krokovny, P., Kulasiri, R., Lee, I. S., Li, Y., Li Gioi, L., Libby, J., Liventsev, D., Lubej, M., Luo, T., Masuda, M., Matsuda, T., Matvienko, D., Miyabayashi, K., Miyata, H., Moon, H. K., Mori, T., Nakano, E., Nakao, M., Nanut, T., Nath, K. J., Nayak, M., Nishida, S., Ogawa, S., Okuno, S., Ono, H., Pal, B., Park, C. -S., Park, C. W., Park, H., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Ritter, M., Sakai, Y., Salehi, M., Sandilya, S., Sanuki, T., Schneider, O., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Seon, O., Sevior, M. E., Shebalin, V., Shibata, T. -A., Shiu, J. -G., Simon, F., Solovieva, E., Starič, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, S., Usov, Y., Van Hulse, C., Varner, G., Varvell, K. E., Vinokurova, A., Vorobyev, V., Wang, C. H., Wang, M. -Z., Wang, P., Watanabe, Y., Widmann, E., Won, E., Yamashita, Y., Ye, H., Yelton, J., Yook, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., Zhulanov, V., and Zupanc, A. Tue . "Measurement of the decays B→ηℓνℓ and B→η'ℓνℓ in fully reconstructed events at Belle". United States. doi:10.1103/PhysRevD.96.091102. https://www.osti.gov/servlets/purl/1594348.
@article{osti_1594348,
title = {Measurement of the decays B→ηℓνℓ and B→η'ℓνℓ in fully reconstructed events at Belle},
author = {Beleño, C. and Dingfelder, J. and Urquijo, P. and Aihara, H. and Al Said, S. and Asner, D. M. and Aushev, T. and Ayad, R. and Babu, V. and Badhrees, I. and Bakich, A. M. and Bansal, V. and Behera, P. and Bhuyan, B. and Biswal, J. and Bobrov, A. and Bračko, M. and Browder, T. E. and Červenkov, D. and Chen, A. and Cheon, B. G. and Chistov, R. and Cho, K. and Choi, S. -K. and Choi, Y. and Cinabro, D. and Dash, N. and Di Carlo, S. and Doležal, Z. and Eidelman, S. and Farhat, H. and Fast, J. E. and Ferber, T. and Frey, A. and Fulsom, B. G. and Gaur, V. and Gabyshev, N. and Garmash, A. and Gillard, R. and Goldenzweig, P. and Hara, T. and Hayashii, H. and Hedges, M. T. and Hou, W. -S. and Iijima, T. and Inami, K. and Inguglia, G. and Ishikawa, A. and Itoh, R. and Iwasaki, Y. and Jeon, H. B. and Jin, Y. and Joffe, D. and Joo, K. K. and Kang, K. H. and Karyan, G. and Kim, D. Y. and Kim, J. B. and Kim, K. T. and Kim, M. J. and Kim, Y. J. and Kinoshita, K. and Kodyš, P. and Korpar, S. and Kotchetkov, D. and Križan, P. and Krokovny, P. and Kulasiri, R. and Lee, I. S. and Li, Y. and Li Gioi, L. and Libby, J. and Liventsev, D. and Lubej, M. and Luo, T. and Masuda, M. and Matsuda, T. and Matvienko, D. and Miyabayashi, K. and Miyata, H. and Moon, H. K. and Mori, T. and Nakano, E. and Nakao, M. and Nanut, T. and Nath, K. J. and Nayak, M. and Nishida, S. and Ogawa, S. and Okuno, S. and Ono, H. and Pal, B. and Park, C. -S. and Park, C. W. and Park, H. and Pedlar, T. K. and Pestotnik, R. and Piilonen, L. E. and Ritter, M. and Sakai, Y. and Salehi, M. and Sandilya, S. and Sanuki, T. and Schneider, O. and Schnell, G. and Schwanda, C. and Seino, Y. and Senyo, K. and Seon, O. and Sevior, M. E. and Shebalin, V. and Shibata, T. -A. and Shiu, J. -G. and Simon, F. and Solovieva, E. and Starič, M. and Sumiyoshi, T. and Takizawa, M. and Tamponi, U. and Tanida, K. and Tenchini, F. and Uchida, M. and Uglov, T. and Unno, Y. and Uno, S. and Usov, Y. and Van Hulse, C. and Varner, G. and Varvell, K. E. and Vinokurova, A. and Vorobyev, V. and Wang, C. H. and Wang, M. -Z. and Wang, P. and Watanabe, Y. and Widmann, E. and Won, E. and Yamashita, Y. and Ye, H. and Yelton, J. and Yook, Y. and Zhang, Z. P. and Zhilich, V. and Zhukova, V. and Zhulanov, V. and Zupanc, A.},
abstractNote = {We report branching fraction measurements of the decays B+ → ηℓ+νℓ and B+ → η'ℓ+νℓ based on 711 fb–1 of data collected near the Υ(4S) resonance with the Belle experiment at the KEKB asymmetric-energy e+e– collider. This data sample contains 772 million BB¯ events. One of the two B mesons is fully reconstructed in a hadronic decay mode. Among the remaining (“signal-B”) daughters, we search for the η meson in two decay channels, η → γγ and η → π+π–π0, and reconstruct the η' meson in η' → ηπ+π– with subsequent decay of the η into γγ. Combining the two η modes and using an extended maximum likelihood, the B+ → ηℓ+νℓ branching fraction is measured to be (4.2 ± 1.1(stat.) ± 0.3(syst.)) × 10–5. For B+ → η'ℓ+νℓ, we observe no significant signal and set an upper limit of 0.72 × 10–4 at 90% confidence level.},
doi = {10.1103/PhysRevD.96.091102},
journal = {Physical Review D},
number = [9],
volume = [96],
place = {United States},
year = {2017},
month = {11}
}

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