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Title: First observation of radiative B⁰ → ΦK⁰γ decays and measurements of their time-dependent CP violation

Abstract

We report the first observation of the radiative decay B⁰→ ΦK⁰γ using a data sample of 772 × 10⁶ BB¯ pairs collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e⁺e⁻ collider. We observe a signal of 37 ± 8 events with a significance of 5.4 standard deviations including systematic uncertainties. The measured branching fraction is B(B⁰→ ΦK⁰γ) = (2.74±0.60±0.32)×10⁻⁶, where the uncertainties are statistical and systematic, respectively. We also report the first measurements of time-dependent CP-violation parameters: S ΦK⁰Sγ = +0.74⁺0.72 –1.05(stat)+0.10 –0.24(syst) and A ΦK⁰Sγ = +0.35 ± 0.58(stat)+0.23 –0.10(syst). Furthermore, we measure B(B⁺ → ΦK⁺γ) = (2.48 ± 0.30 ± 0.24) × 10⁻⁶, ACP = –0.03 ± 0.11 ± 0.08 and find that the signal is concentrated in the MΦK mass region near threshold.

Authors:
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Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United State)
Sponsoring Org.:
USDOE
OSTI Identifier:
1214916
Report Number(s):
PNNL-SA-81591
Journal ID: ISSN 1550-7998: PRVDAQ; 45392; KA1202033
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 84; Journal Issue: 7; Journal ID: ISSN 1550-7998: PRVDAQ
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

Citation Formats

Sahoo, Himansu B., Browder, Thomas E., Adachi, I., Asner, David M., Aulchenko, V., Bakich, A. M., Barberio, E., Belous, K., Bhardwaj, V., Bhuyan, Bipul, Bondar, A., Bozek, A., Bracko, Marko, Brovchenko, O., Chen, A., Chen, P., Cheon, B. G., Cho, K., Choi, Y., Dalseno, J., Dolezal, Z., Drasal, Z., Eidelman, S., Epifanov, D., Fast, James E., Gaur, Vipin, Gabyshev, N., Haba, J., Hayasaka, K., Hayashii, H., Horii, Y., Hoshi, Y., Hou, W. S., Hsiung, Y. B., Hyun, H. J., Iijima, T., Inami, K., Ishikawa, A., Itoh, R., Iwabuchi, M., Iwasaki, Y., Iwashita, T., Joshi, N. J., Julius, T., Kang, J. H., Kawasaki, T., Kiesling, C., 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, Kay, Ko, Byeong Rok, Kobayashi, N., Koblitz, S., Kodys, P., Korpar, S., Krizan, P., Kuhr, T., Kumar, R., Kumita, T., Kuzmin, A., Kwon, Y. J., Lange, J. S., Lee, M. J., Lee, S. H., Li, J., Li, Y., Libby, J., Lim, C. L., Liu, Z. Q., Liventsev, Dmitri, Louvot, R., Matvienko, D., McOnie, S., Miyabayashi, K., Miyata, H., Miyazaki, Y., Mizuk, R., Mohanty, G. B., Mori, T., Nakao, M., Natkaniec, Z., Ng, C., Nishida, S., Nishimura, Kurtis A., Nitoh, O., Nozaki, T., Ohshima, T., Okuno, S., Olsen, Stephen L., Onuki, Y., Pakhlov, P., Pakhlova, Galina, Park, C. W., Park, H. K., Peng, T., Pestotnik, Rok, Petric, Marko, Piilonen, Leo E., Prim, M., Rohrken, M., Ryu, S., Sakai, K., Sakai, Y., Sanuki, T., Schneider, O., Schwanda, C., Schwartz, A. J., Senyo, K., Seon, O., Sevior, Martin E., Shapkin, M., Shebalin, V., Shibata, T. A., Shiu, Jing-Ge, Shwartz, B., Simon, F., Smerkol, P., Sohn, Young-Soo, Sokolov, Anatoly, Solovyeva, Elena, Stanic, S., Staric, M., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Suzuki, S., Tatishvili, Gocha, Teramoto, Y., Trabelsi, K., Uchida, M., Uglov, T., Unno, Yuji, Uno, S., Ushiroda, Y., Vahsen, Sven E., Varner, Gary, Vinokurova, A., Watanabe, M., Watanabe, Y., Williams, K. M., Won, Eun Il, Yabsley, B. D., Yamashita, Y., Yuan, C. Z., Yusa, Y., Zhang, C. C., Zhang, Z. P., Zhilich, V., Zhou, Peng, Zhulanov, V., and Zupanc, A. First observation of radiative B⁰ → ΦK⁰γ decays and measurements of their time-dependent CP violation. United States: N. p., 2011. Web. doi:10.1103/PhysRevD.84.071101.
Sahoo, Himansu B., Browder, Thomas E., Adachi, I., Asner, David M., Aulchenko, V., Bakich, A. M., Barberio, E., Belous, K., Bhardwaj, V., Bhuyan, Bipul, Bondar, A., Bozek, A., Bracko, Marko, Brovchenko, O., Chen, A., Chen, P., Cheon, B. G., Cho, K., Choi, Y., Dalseno, J., Dolezal, Z., Drasal, Z., Eidelman, S., Epifanov, D., Fast, James E., Gaur, Vipin, Gabyshev, N., Haba, J., Hayasaka, K., Hayashii, H., Horii, Y., Hoshi, Y., Hou, W. S., Hsiung, Y. B., Hyun, H. J., Iijima, T., Inami, K., Ishikawa, A., Itoh, R., Iwabuchi, M., Iwasaki, Y., Iwashita, T., Joshi, N. J., Julius, T., Kang, J. H., Kawasaki, T., Kiesling, C., 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, Kay, Ko, Byeong Rok, Kobayashi, N., Koblitz, S., Kodys, P., Korpar, S., Krizan, P., Kuhr, T., Kumar, R., Kumita, T., Kuzmin, A., Kwon, Y. J., Lange, J. S., Lee, M. J., Lee, S. H., Li, J., Li, Y., Libby, J., Lim, C. L., Liu, Z. Q., Liventsev, Dmitri, Louvot, R., Matvienko, D., McOnie, S., Miyabayashi, K., Miyata, H., Miyazaki, Y., Mizuk, R., Mohanty, G. B., Mori, T., Nakao, M., Natkaniec, Z., Ng, C., Nishida, S., Nishimura, Kurtis A., Nitoh, O., Nozaki, T., Ohshima, T., Okuno, S., Olsen, Stephen L., Onuki, Y., Pakhlov, P., Pakhlova, Galina, Park, C. W., Park, H. K., Peng, T., Pestotnik, Rok, Petric, Marko, Piilonen, Leo E., Prim, M., Rohrken, M., Ryu, S., Sakai, K., Sakai, Y., Sanuki, T., Schneider, O., Schwanda, C., Schwartz, A. J., Senyo, K., Seon, O., Sevior, Martin E., Shapkin, M., Shebalin, V., Shibata, T. A., Shiu, Jing-Ge, Shwartz, B., Simon, F., Smerkol, P., Sohn, Young-Soo, Sokolov, Anatoly, Solovyeva, Elena, Stanic, S., Staric, M., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Suzuki, S., Tatishvili, Gocha, Teramoto, Y., Trabelsi, K., Uchida, M., Uglov, T., Unno, Yuji, Uno, S., Ushiroda, Y., Vahsen, Sven E., Varner, Gary, Vinokurova, A., Watanabe, M., Watanabe, Y., Williams, K. M., Won, Eun Il, Yabsley, B. D., Yamashita, Y., Yuan, C. Z., Yusa, Y., Zhang, C. C., Zhang, Z. P., Zhilich, V., Zhou, Peng, Zhulanov, V., & Zupanc, A. First observation of radiative B⁰ → ΦK⁰γ decays and measurements of their time-dependent CP violation. United States. https://doi.org/10.1103/PhysRevD.84.071101
Sahoo, Himansu B., Browder, Thomas E., Adachi, I., Asner, David M., Aulchenko, V., Bakich, A. M., Barberio, E., Belous, K., Bhardwaj, V., Bhuyan, Bipul, Bondar, A., Bozek, A., Bracko, Marko, Brovchenko, O., Chen, A., Chen, P., Cheon, B. G., Cho, K., Choi, Y., Dalseno, J., Dolezal, Z., Drasal, Z., Eidelman, S., Epifanov, D., Fast, James E., Gaur, Vipin, Gabyshev, N., Haba, J., Hayasaka, K., Hayashii, H., Horii, Y., Hoshi, Y., Hou, W. S., Hsiung, Y. B., Hyun, H. J., Iijima, T., Inami, K., Ishikawa, A., Itoh, R., Iwabuchi, M., Iwasaki, Y., Iwashita, T., Joshi, N. J., Julius, T., Kang, J. H., Kawasaki, T., Kiesling, C., 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, Kay, Ko, Byeong Rok, Kobayashi, N., Koblitz, S., Kodys, P., Korpar, S., Krizan, P., Kuhr, T., Kumar, R., Kumita, T., Kuzmin, A., Kwon, Y. J., Lange, J. S., Lee, M. J., Lee, S. H., Li, J., Li, Y., Libby, J., Lim, C. L., Liu, Z. Q., Liventsev, Dmitri, Louvot, R., Matvienko, D., McOnie, S., Miyabayashi, K., Miyata, H., Miyazaki, Y., Mizuk, R., Mohanty, G. B., Mori, T., Nakao, M., Natkaniec, Z., Ng, C., Nishida, S., Nishimura, Kurtis A., Nitoh, O., Nozaki, T., Ohshima, T., Okuno, S., Olsen, Stephen L., Onuki, Y., Pakhlov, P., Pakhlova, Galina, Park, C. W., Park, H. K., Peng, T., Pestotnik, Rok, Petric, Marko, Piilonen, Leo E., Prim, M., Rohrken, M., Ryu, S., Sakai, K., Sakai, Y., Sanuki, T., Schneider, O., Schwanda, C., Schwartz, A. J., Senyo, K., Seon, O., Sevior, Martin E., Shapkin, M., Shebalin, V., Shibata, T. A., Shiu, Jing-Ge, Shwartz, B., Simon, F., Smerkol, P., Sohn, Young-Soo, Sokolov, Anatoly, Solovyeva, Elena, Stanic, S., Staric, M., Sumihama, M., Sumisawa, K., Sumiyoshi, T., Suzuki, S., Tatishvili, Gocha, Teramoto, Y., Trabelsi, K., Uchida, M., Uglov, T., Unno, Yuji, Uno, S., Ushiroda, Y., Vahsen, Sven E., Varner, Gary, Vinokurova, A., Watanabe, M., Watanabe, Y., Williams, K. M., Won, Eun Il, Yabsley, B. D., Yamashita, Y., Yuan, C. Z., Yusa, Y., Zhang, C. C., Zhang, Z. P., Zhilich, V., Zhou, Peng, Zhulanov, V., and Zupanc, A. 2011. "First observation of radiative B⁰ → ΦK⁰γ decays and measurements of their time-dependent CP violation". United States. https://doi.org/10.1103/PhysRevD.84.071101.
@article{osti_1214916,
title = {First observation of radiative B⁰ → ΦK⁰γ decays and measurements of their time-dependent CP violation},
author = {Sahoo, Himansu B. and Browder, Thomas E. and Adachi, I. and Asner, David M. and Aulchenko, V. and Bakich, A. M. and Barberio, E. and Belous, K. and Bhardwaj, V. and Bhuyan, Bipul and Bondar, A. and Bozek, A. and Bracko, Marko and Brovchenko, O. and Chen, A. and Chen, P. and Cheon, B. G. and Cho, K. and Choi, Y. and Dalseno, J. and Dolezal, Z. and Drasal, Z. and Eidelman, S. and Epifanov, D. and Fast, James E. and Gaur, Vipin and Gabyshev, N. and Haba, J. and Hayasaka, K. and Hayashii, H. and Horii, Y. and Hoshi, Y. and Hou, W. S. and Hsiung, Y. B. and Hyun, H. J. and Iijima, T. and Inami, K. and Ishikawa, A. and Itoh, R. and Iwabuchi, M. and Iwasaki, Y. and Iwashita, T. and Joshi, N. J. and Julius, T. and Kang, J. H. and Kawasaki, T. and Kiesling, C. and Kim, H. J. and Kim, H. O. and Kim, J. B. and Kim, J. H. and Kim, K. T. and Kim, M. J. and Kim, S. K. and Kim, Y. J. and Kinoshita, Kay and Ko, Byeong Rok and Kobayashi, N. and Koblitz, S. and Kodys, P. and Korpar, S. and Krizan, P. and Kuhr, T. and Kumar, R. and Kumita, T. and Kuzmin, A. and Kwon, Y. J. and Lange, J. S. and Lee, M. J. and Lee, S. H. and Li, J. and Li, Y. and Libby, J. and Lim, C. L. and Liu, Z. Q. and Liventsev, Dmitri and Louvot, R. and Matvienko, D. and McOnie, S. and Miyabayashi, K. and Miyata, H. and Miyazaki, Y. and Mizuk, R. and Mohanty, G. B. and Mori, T. and Nakao, M. and Natkaniec, Z. and Ng, C. and Nishida, S. and Nishimura, Kurtis A. and Nitoh, O. and Nozaki, T. and Ohshima, T. and Okuno, S. and Olsen, Stephen L. and Onuki, Y. and Pakhlov, P. and Pakhlova, Galina and Park, C. W. and Park, H. K. and Peng, T. and Pestotnik, Rok and Petric, Marko and Piilonen, Leo E. and Prim, M. and Rohrken, M. and Ryu, S. and Sakai, K. and Sakai, Y. and Sanuki, T. and Schneider, O. and Schwanda, C. and Schwartz, A. J. and Senyo, K. and Seon, O. and Sevior, Martin E. and Shapkin, M. and Shebalin, V. and Shibata, T. A. and Shiu, Jing-Ge and Shwartz, B. and Simon, F. and Smerkol, P. and Sohn, Young-Soo and Sokolov, Anatoly and Solovyeva, Elena and Stanic, S. and Staric, M. and Sumihama, M. and Sumisawa, K. and Sumiyoshi, T. and Suzuki, S. and Tatishvili, Gocha and Teramoto, Y. and Trabelsi, K. and Uchida, M. and Uglov, T. and Unno, Yuji and Uno, S. and Ushiroda, Y. and Vahsen, Sven E. and Varner, Gary and Vinokurova, A. and Watanabe, M. and Watanabe, Y. and Williams, K. M. and Won, Eun Il and Yabsley, B. D. and Yamashita, Y. and Yuan, C. Z. and Yusa, Y. and Zhang, C. C. and Zhang, Z. P. and Zhilich, V. and Zhou, Peng and Zhulanov, V. and Zupanc, A.},
abstractNote = {We report the first observation of the radiative decay B⁰→ ΦK⁰γ using a data sample of 772 × 10⁶ BB¯ pairs collected at the (4S) resonance with the Belle detector at the KEKB asymmetric-energy e⁺e⁻ collider. We observe a signal of 37 ± 8 events with a significance of 5.4 standard deviations including systematic uncertainties. The measured branching fraction is B(B⁰→ ΦK⁰γ) = (2.74±0.60±0.32)×10⁻⁶, where the uncertainties are statistical and systematic, respectively. We also report the first measurements of time-dependent CP-violation parameters: S ΦK⁰Sγ = +0.74⁺0.72 –1.05(stat)+0.10 –0.24(syst) and A ΦK⁰Sγ = +0.35 ± 0.58(stat)+0.23 –0.10(syst). Furthermore, we measure B(B⁺ → ΦK⁺γ) = (2.48 ± 0.30 ± 0.24) × 10⁻⁶, ACP = –0.03 ± 0.11 ± 0.08 and find that the signal is concentrated in the MΦK mass region near threshold.},
doi = {10.1103/PhysRevD.84.071101},
url = {https://www.osti.gov/biblio/1214916}, journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
issn = {1550-7998: PRVDAQ},
number = 7,
volume = 84,
place = {United States},
year = {Thu Oct 06 00:00:00 EDT 2011},
month = {Thu Oct 06 00:00:00 EDT 2011}
}