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Title: Observation of D⁺→K⁺η (') and Search for CP Violation in D⁺→π⁺η (') Decays

Abstract

We report the first observation of the doubly Cabibbo-suppressed decays D⁺→K⁺η (') using a 791 fb⁻¹ data sample collected with the Belle detector at the KEKB asymmetric-energy e⁺e⁻ collider. The ratio of the branching fractions of doubly Cabibbo-suppressed relative to singly Cabibbo-suppressed D⁺→π⁺η (') decays are B(K⁺η)/B(D⁺→π⁺η)=(3.06±0.43±0.14)% and B(K⁺η ('))/B(D⁺→π⁺η (')) = (3.77±0.39±0.10)%. From these, we find that the relative final-state phase difference between the tree and annihilation amplitudes in D⁺ decays, δ TA, is (72±9)° or (288±9)°. We also report the most precise measurements of CP asymmetries to date: A D⁺ CP=(+1.74±1.13±0.19)% and A D⁺→π+η' CP = (-0.12±1.12±0.17)%.

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Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1101218
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters Journal Volume: 107 Journal Issue: 22; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Won, E., Ko, B. R., Adachi, I., Aihara, H., Arinstein, K., 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., 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., Danilov, M., Doležal, Z., Drásal, Z., Drutskoy, A., Eidelman, S., Fast, J. E., Gaur, V., Gabyshev, N., Garmash, A., Goh, Y. M., Golob, B., Haba, J., Hara, T., 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., 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., Kobayashi, N., Koblitz, S., Kodyš, P., Korpar, S., Križan, P., 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, 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., Neubauer, S., Nishida, S., Nishimura, K., Nitoh, O., Ogawa, S., Ohshima, T., Okuno, S., Olsen, S. L., Onuki, Y., Pakhlov, P., Pakhlova, G., Park, H., Park, H. K., Park, K. S., Pestotnik, R., Petrič, M., Piilonen, L. E., Röhrken, M., Ryu, S., Sahoo, H., Sakai, K., Sakai, Y., Sanuki, T., Schneider, O., Schwanda, C., Schwartz, A. J., Senyo, K., Seon, O., Sevior, M. E., Shen, C. P., Shibata, T.-A., Shiu, J.-G., Simon, F., Singh, J. B., Smerkol, P., Sohn, Y.-S., Sokolov, A., Solovieva, E., Stanič, S., Starič, M., Sumihama, M., Sumiyoshi, T., Suzuki, S., Tatishvili, G., Teramoto, Y., Trabelsi, K., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Usov, Y., Vahsen, S. E., Varner, G., Vinokurova, A., Wang, C. H., Wang, M.-Z., Wang, P., Watanabe, M., Watanabe, Y., Williams, K. M., Yabsley, B. D., Yamashita, Y., Yamauchi, M., Zhang, Z. P., Zhilich, V., Zhulanov, V., Zupanc, A., and Zyukova, O. Observation of D⁺→K⁺η(') and Search for CP Violation in D⁺→π⁺η(') Decays. United States: N. p., 2011. Web. doi:10.1103/PhysRevLett.107.221801.
Won, E., Ko, B. R., Adachi, I., Aihara, H., Arinstein, K., 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., 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., Danilov, M., Doležal, Z., Drásal, Z., Drutskoy, A., Eidelman, S., Fast, J. E., Gaur, V., Gabyshev, N., Garmash, A., Goh, Y. M., Golob, B., Haba, J., Hara, T., 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., 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., Kobayashi, N., Koblitz, S., Kodyš, P., Korpar, S., Križan, P., 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, 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., Neubauer, S., Nishida, S., Nishimura, K., Nitoh, O., Ogawa, S., Ohshima, T., Okuno, S., Olsen, S. L., Onuki, Y., Pakhlov, P., Pakhlova, G., Park, H., Park, H. K., Park, K. S., Pestotnik, R., Petrič, M., Piilonen, L. E., Röhrken, M., Ryu, S., Sahoo, H., Sakai, K., Sakai, Y., Sanuki, T., Schneider, O., Schwanda, C., Schwartz, A. J., Senyo, K., Seon, O., Sevior, M. E., Shen, C. P., Shibata, T.-A., Shiu, J.-G., Simon, F., Singh, J. B., Smerkol, P., Sohn, Y.-S., Sokolov, A., Solovieva, E., Stanič, S., Starič, M., Sumihama, M., Sumiyoshi, T., Suzuki, S., Tatishvili, G., Teramoto, Y., Trabelsi, K., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Usov, Y., Vahsen, S. E., Varner, G., Vinokurova, A., Wang, C. H., Wang, M.-Z., Wang, P., Watanabe, M., Watanabe, Y., Williams, K. M., Yabsley, B. D., Yamashita, Y., Yamauchi, M., Zhang, Z. P., Zhilich, V., Zhulanov, V., Zupanc, A., & Zyukova, O. Observation of D⁺→K⁺η(') and Search for CP Violation in D⁺→π⁺η(') Decays. United States. doi:10.1103/PhysRevLett.107.221801.
Won, E., Ko, B. R., Adachi, I., Aihara, H., Arinstein, K., 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., 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., Danilov, M., Doležal, Z., Drásal, Z., Drutskoy, A., Eidelman, S., Fast, J. E., Gaur, V., Gabyshev, N., Garmash, A., Goh, Y. M., Golob, B., Haba, J., Hara, T., 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., 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., Kobayashi, N., Koblitz, S., Kodyš, P., Korpar, S., Križan, P., 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, 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., Neubauer, S., Nishida, S., Nishimura, K., Nitoh, O., Ogawa, S., Ohshima, T., Okuno, S., Olsen, S. L., Onuki, Y., Pakhlov, P., Pakhlova, G., Park, H., Park, H. K., Park, K. S., Pestotnik, R., Petrič, M., Piilonen, L. E., Röhrken, M., Ryu, S., Sahoo, H., Sakai, K., Sakai, Y., Sanuki, T., Schneider, O., Schwanda, C., Schwartz, A. J., Senyo, K., Seon, O., Sevior, M. E., Shen, C. P., Shibata, T.-A., Shiu, J.-G., Simon, F., Singh, J. B., Smerkol, P., Sohn, Y.-S., Sokolov, A., Solovieva, E., Stanič, S., Starič, M., Sumihama, M., Sumiyoshi, T., Suzuki, S., Tatishvili, G., Teramoto, Y., Trabelsi, K., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Usov, Y., Vahsen, S. E., Varner, G., Vinokurova, A., Wang, C. H., Wang, M.-Z., Wang, P., Watanabe, M., Watanabe, Y., Williams, K. M., Yabsley, B. D., Yamashita, Y., Yamauchi, M., Zhang, Z. P., Zhilich, V., Zhulanov, V., Zupanc, A., and Zyukova, O. Mon . "Observation of D⁺→K⁺η(') and Search for CP Violation in D⁺→π⁺η(') Decays". United States. doi:10.1103/PhysRevLett.107.221801.
@article{osti_1101218,
title = {Observation of D⁺→K⁺η(') and Search for CP Violation in D⁺→π⁺η(') Decays},
author = {Won, E. and Ko, B. R. and Adachi, I. and Aihara, H. and Arinstein, K. and Asner, D. M. and Aushev, T. and Bakich, A. M. and Barberio, E. and Bay, A. and Bhardwaj, V. and Bhuyan, B. and Bischofberger, M. and Bondar, A. and Bozek, A. and Bračko, M. and Brodzicka, J. and Browder, T. E. and Chang, P. and Chen, A. and Chen, P. and Cheon, B. G. and Chilikin, K. and Cho, I.-S. and Cho, K. and Choi, S.-K. and Choi, Y. and Dalseno, J. and Danilov, M. and Doležal, Z. and Drásal, Z. and Drutskoy, A. and Eidelman, S. and Fast, J. E. and Gaur, V. and Gabyshev, N. and Garmash, A. and Goh, Y. M. and Golob, B. and Haba, J. and Hara, T. 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 Katayama, N. and Kawasaki, T. and Kichimi, H. 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, K. and Kobayashi, N. and Koblitz, S. and Kodyš, P. and Korpar, S. and Križan, P. 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, C. and Liu, Y. and Liventsev, D. and Louvot, R. and McOnie, S. and Miyabayashi, K. and Miyata, H. and Miyazaki, Y. and Mizuk, R. and Mohanty, G. B. and Nagasaka, Y. and Nakano, E. and Nakao, M. and Nakazawa, H. and Natkaniec, Z. and Neubauer, S. and Nishida, S. and Nishimura, K. and Nitoh, O. and Ogawa, S. and Ohshima, T. and Okuno, S. and Olsen, S. L. and Onuki, Y. and Pakhlov, P. and Pakhlova, G. and Park, H. and Park, H. K. and Park, K. S. and Pestotnik, R. and Petrič, M. and Piilonen, L. E. and Röhrken, M. and Ryu, S. and Sahoo, H. 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, M. E. and Shen, C. P. and Shibata, T.-A. and Shiu, J.-G. and Simon, F. and Singh, J. B. and Smerkol, P. and Sohn, Y.-S. and Sokolov, A. and Solovieva, E. and Stanič, S. and Starič, M. and Sumihama, M. and Sumiyoshi, T. and Suzuki, S. and Tatishvili, G. and Teramoto, Y. and Trabelsi, K. and Uchida, M. and Uehara, S. and Uglov, T. and Unno, Y. and Uno, S. and Usov, Y. and Vahsen, S. E. and Varner, G. and Vinokurova, A. and Wang, C. H. and Wang, M.-Z. and Wang, P. and Watanabe, M. and Watanabe, Y. and Williams, K. M. and Yabsley, B. D. and Yamashita, Y. and Yamauchi, M. and Zhang, Z. P. and Zhilich, V. and Zhulanov, V. and Zupanc, A. and Zyukova, O.},
abstractNote = {We report the first observation of the doubly Cabibbo-suppressed decays D⁺→K⁺η(') using a 791 fb⁻¹ data sample collected with the Belle detector at the KEKB asymmetric-energy e⁺e⁻ collider. The ratio of the branching fractions of doubly Cabibbo-suppressed relative to singly Cabibbo-suppressed D⁺→π⁺η(') decays are B(K⁺η)/B(D⁺→π⁺η)=(3.06±0.43±0.14)% and B(K⁺η('))/B(D⁺→π⁺η(')) = (3.77±0.39±0.10)%. From these, we find that the relative final-state phase difference between the tree and annihilation amplitudes in D⁺ decays, δTA, is (72±9)° or (288±9)°. We also report the most precise measurements of CP asymmetries to date: AD⁺CP=(+1.74±1.13±0.19)% and AD⁺→π+η'CP = (-0.12±1.12±0.17)%.},
doi = {10.1103/PhysRevLett.107.221801},
journal = {Physical Review Letters},
number = 22,
volume = 107,
place = {United States},
year = {2011},
month = {11}
}

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DOI: 10.1103/PhysRevLett.107.221801

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