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Pesántez L, Urquijo P, Dingfelder J, et al. Measurement of the Direct CP Asymmetry in B¯→X(s+dγ) Decays with a Lepton Tag. Phys Rev Lett. 2015;114(15):151601doi: 10.1103/PhysRevLett.114.151601.
Pesántez, L., Urquijo, P., Dingfelder, J., Abdesselam, A., Adachi, I., Adamczyk, K., Aihara, H., Al Said, S., Arinstein, K., Asner, D. M., Aulchenko, V., Aushev, T., Ayad, R., Bahinipati, S., Bakich, A. M., Bansal, V., Barberio, E., Bhardwaj, V., Bhuyan, B., Bobrov, A., Bondar, A., Bonvicini, G., Bozek, A., Bračko, M., Browder, T. E., Červenkov, D., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Chistov, R., Cho, K., Chobanova, V., Choi, Y., Cinabro, D., Dalseno, J., Doležal, Z., Drásal, Z., Drutskoy, A., Dutta, D., Eidelman, S., Farhat, H., Fast, J. E., Ferber, T., Frost, O., Gaur, V., Gabyshev, N., Ganguly, S., Garmash, A., Getzkow, D., Gillard, R., Goh, Y. M., Golob, B., Haba, J., Hasenbusch, J., Hayashii, H., He, X. H., Heller, A., Horiguchi, T., Hou, W. S., Huschle, M., Iijima, T., Inami, K., Ishikawa, A., Itoh, R., Iwasaki, Y., Jaegle, I., Joffe, D., Julius, T., Kang, K. H., Kato, E., Kawasaki, T., Kiesling, C., Kim, D. Y., Kim, J. B., Kim, J. H., Kim, K. T., Kim, M. J., Kim, S. H., Kim, Y. J., Ko, B. R., Kodyš, P., Korpar, S., Križan, P., Krokovny, P., Kronenbitter, B., Kuhr, T., Kumita, T., Kuzmin, A., Kwon, Y. J., Lange, J. S., Lee, I. S., Li, Y., Li Gioi, L., Libby, J., Liventsev, D., Lukin, P., Matvienko, D., Miyabayashi, K., Miyata, H., Mizuk, R., Mohanty, G. B., Moll, A., Moon, H. K., Nakano, E., Nakao, M., Nanut, T., Natkaniec, Z., Nayak, M., Ng, C., Nisar, N. K., Nishida, S., Ogawa, S., Okuno, S., Olsen, S. L., Oswald, C., Pakhlov, P., Pakhlova, G., Park, C. W., Park, H., Pedlar, T. K., Pestotnik, R., Petrič, M., Piilonen, L. E., Ribežl, E., Ritter, M., Rostomyan, A., Rozanska, M., Sakai, Y., Sandilya, S., Santelj, L., Sanuki, T., Sato, Y., Savinov, V., Schneider, O., Schnell, G., Schwanda, C., Schwartz, A. J., Senyo, K., Seon, O., Sevior, M. E., Shebalin, V., Shen, C. P., Shibata, T. A., Shiu, J. G., Shwartz, B., Sibidanov, A., Simon, F., Sohn, Y. S., Sokolov, A., Solovieva, E., Starič, M., Steder, M., Sumiyoshi, T., Tamponi, U., Taniguchi, N., Tatishvili, G., Teramoto, Y., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, S., Usov, Y., Van Hulse, C., Vanhoefer, P., Varner, G., Vinokurova, A., Vorobyev, V., Wagner, M. N., Wang, B., Wang, C. H., Wang, M. Z., Wang, P., Watanabe, Y., Williams, K. M., Won, E., Yamaoka, J., Yashchenko, S., Yook, Y., Zhang, Z. P., Zhilich, V., Zhulanov, V., Zupanc, A. (2015). Measurement of the Direct CP Asymmetry in B¯→X(s+dγ) Decays with a Lepton Tag. Physical review letters, 114(15), 151601. https://doi.org/10.1103/PhysRevLett.114.151601
Pesántez, L, et al. "Measurement of the Direct CP Asymmetry in B¯→X(s+dγ) Decays with a Lepton Tag." Physical review letters vol. 114,15 (2015): 151601. doi: https://doi.org/10.1103/PhysRevLett.114.151601
Pesántez L, Urquijo P, Dingfelder J, Abdesselam A, Adachi I, Adamczyk K, Aihara H, Al Said S, Arinstein K, Asner DM, Aulchenko V, Aushev T, Ayad R, Bahinipati S, Bakich AM, Bansal V, Barberio E, Bhardwaj V, Bhuyan B, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bračko M, Browder TE, Červenkov D, Chekelian V, Chen A, Cheon BG, Chilikin K, Chistov R, Cho K, Chobanova V, Choi Y, Cinabro D, Dalseno J, Doležal Z, Drásal Z, Drutskoy A, Dutta D, Eidelman S, Farhat H, Fast JE, Ferber T, Frost O, Gaur V, Gabyshev N, Ganguly S, Garmash A, Getzkow D, Gillard R, Goh YM, Golob B, Haba J, Hasenbusch J, Hayashii H, He XH, Heller A, Horiguchi T, Hou WS, Huschle M, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki Y, Jaegle I, Joffe D, Julius T, Kang KH, Kato E, Kawasaki T, Kiesling C, Kim DY, Kim JB, Kim JH, Kim KT, Kim MJ, Kim SH, Kim YJ, Ko BR, Kodyš P, Korpar S, Križan P, Krokovny P, Kronenbitter B, Kuhr T, Kumita T, Kuzmin A, Kwon YJ, Lange JS, Lee IS, Li Y, Li Gioi L, Libby J, Liventsev D, Lukin P, Matvienko D, Miyabayashi K, Miyata H, Mizuk R, Mohanty GB, Moll A, Moon HK, Nakano E, Nakao M, Nanut T, Natkaniec Z, Nayak M, Ng C, Nisar NK, Nishida S, Ogawa S, Okuno S, Olsen SL, Oswald C, Pakhlov P, Pakhlova G, Park CW, Park H, Pedlar TK, Pestotnik R, Petrič M, Piilonen LE, Ribežl E, Ritter M, Rostomyan A, Rozanska M, Sakai Y, Sandilya S, Santelj L, Sanuki T, Sato Y, Savinov V, Schneider O, Schnell G, Schwanda C, Schwartz AJ, Senyo K, Seon O, Sevior ME, Shebalin V, Shen CP, Shibata TA, Shiu JG, Shwartz B, Sibidanov A, Simon F, Sohn YS, Sokolov A, Solovieva E, Starič M, Steder M, Sumiyoshi T, Tamponi U, Taniguchi N, Tatishvili G, Teramoto Y, Trabelsi K, Uchida M, Uglov T, Unno Y, Uno S, Usov Y, Van Hulse C, Vanhoefer P, Varner G, Vinokurova A, Vorobyev V, Wagner MN, Wang B, Wang CH, Wang MZ, Wang P, Watanabe Y, Williams KM, Won E, Yamaoka J, Yashchenko S, Yook Y, Zhang ZP, Zhilich V, Zhulanov V, Zupanc A. Measurement of the Direct CP Asymmetry in B¯→X(s+dγ) Decays with a Lepton Tag. Phys Rev Lett. 2015 Apr 17;114(15):151601. doi: 10.1103/PhysRevLett.114.151601. Epub 2015 Apr 15. PMID: 25933306.
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Phys Rev Lett. 2015 Apr 17;114(15):151601. doi: 10.1103/PhysRevLett.114.151601. Epub 2015 Apr 15.

Measurement of the Direct CP Asymmetry in B¯→X(s+dγ) Decays with a Lepton Tag.

Physical review letters

L Pesántez, P Urquijo, J Dingfelder, A Abdesselam, I Adachi, K Adamczyk, H Aihara, S Al Said, K Arinstein, D M Asner, V Aulchenko, T Aushev, R Ayad, S Bahinipati, A M Bakich, V Bansal, E Barberio, V Bhardwaj, B Bhuyan, A Bobrov, A Bondar, G Bonvicini, A Bozek, M Bračko, T E Browder, D Červenkov, V Chekelian, A Chen, B G Cheon, K Chilikin, R Chistov, K Cho, V Chobanova, Y Choi, D Cinabro, J Dalseno, Z Doležal, Z Drásal, A Drutskoy, D Dutta, S Eidelman, H Farhat, J E Fast, T Ferber, O Frost, V Gaur, N Gabyshev, S Ganguly, A Garmash, D Getzkow, R Gillard, Y M Goh, B Golob, J Haba, J Hasenbusch, H Hayashii, X H He, A Heller, T Horiguchi, W-S Hou, M Huschle, T Iijima, K Inami, A Ishikawa, R Itoh, Y Iwasaki, I Jaegle, D Joffe, T Julius, K H Kang, E Kato, T Kawasaki, C Kiesling, D Y Kim, J B Kim, J H Kim, K T Kim, M J Kim, S H Kim, Y J Kim, B R Ko, P Kodyš, S Korpar, P Križan, P Krokovny, B Kronenbitter, T Kuhr, T Kumita, A Kuzmin, Y-J Kwon, J S Lange, I S Lee, Y Li, L Li Gioi, J Libby, D Liventsev, P Lukin, D Matvienko, K Miyabayashi, H Miyata, R Mizuk, G B Mohanty, A Moll, H K Moon, E Nakano, M Nakao, T Nanut, Z Natkaniec, M Nayak, C Ng, N K Nisar, S Nishida, S Ogawa, S Okuno, S L Olsen, C Oswald, P Pakhlov, G Pakhlova, C W Park, H Park, T K Pedlar, R Pestotnik, M Petrič, L E Piilonen, E Ribežl, M Ritter, A Rostomyan, M Rozanska, Y Sakai, S Sandilya, L Santelj, T Sanuki, Y Sato, V Savinov, O Schneider, G Schnell, C Schwanda, A J Schwartz, K Senyo, O Seon, M E Sevior, V Shebalin, C P Shen, T-A Shibata, J-G Shiu, B Shwartz, A Sibidanov, F Simon, Y-S Sohn, A Sokolov, E Solovieva, M Starič, M Steder, T Sumiyoshi, U Tamponi, N Taniguchi, G Tatishvili, Y Teramoto, K Trabelsi, M Uchida, T Uglov, Y Unno, S Uno, Y Usov, C Van Hulse, P Vanhoefer, G Varner, A Vinokurova, V Vorobyev, M N Wagner, B Wang, C H Wang, M-Z Wang, P Wang, Y Watanabe, K M Williams, E Won, J Yamaoka, S Yashchenko, Y Yook, Z P Zhang, V Zhilich, V Zhulanov, A Zupanc,

Affiliations

  1. University of Bonn, 53115 Bonn.
  2. School of Physics, University of Melbourne, Victoria 3010.
  3. Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451.
  4. The Graduate University for Advanced Studies, Hayama 240-0193.
  5. High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
  6. H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342.
  7. Department of Physics, University of Tokyo, Tokyo 113-0033.
  8. Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589.
  9. Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk 630090.
  10. Pacific Northwest National Laboratory, Richland, Washington 99352.
  11. Institute for Theoretical and Experimental Physics, Moscow 117218.
  12. Moscow Institute of Physics and Technology, Moscow Region 141700.
  13. Indian Institute of Technology Bhubaneswar, Satya Nagar 751007.
  14. School of Physics, University of Sydney, New South Wales 2006.
  15. Nara Women's University, Nara 630-8506.
  16. Indian Institute of Technology Guwahati, Assam 781039.
  17. Wayne State University, Detroit, Michigan 48202.
  18. J. Stefan Institute, 1000 Ljubljana.
  19. University of Maribor, 2000 Maribor.
  20. University of Hawaii, Honolulu, Hawaii 96822.
  21. Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
  22. Max-Planck-Institut für Physik, 80805 München.
  23. National Central University, Chung-li 32054.
  24. Hanyang University, Seoul 133-791.
  25. Korea Institute of Science and Technology Information, Daejeon 305-806.
  26. Sungkyunkwan University, Suwon 440-746.
  27. Excellence Cluster Universe, Technische Universität München, 85748 Garching.
  28. Moscow Physical Engineering Institute, Moscow 115409.
  29. Deutsches Elektronen-Synchrotron, 22607 Hamburg.
  30. Tata Institute of Fundamental Research, Mumbai 400005.
  31. Justus-Liebig-Universität Gießen, 35392 Gießen.
  32. Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana.
  33. Peking University, Beijing 100871.
  34. Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.
  35. Tohoku University, Sendai 980-8578.
  36. Department of Physics, National Taiwan University, Taipei 10617.
  37. Graduate School of Science, Nagoya University, Nagoya 464-8602.
  38. Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
  39. Kennesaw State University, Kennesaw, Georgia 30144.
  40. Kyungpook National University, Daegu 702-701.
  41. Niigata University, Niigata 950-2181.
  42. Soongsil University, Seoul 156-743.
  43. Korea University, Seoul 136-713.
  44. Tokyo Metropolitan University, Tokyo 192-0397.
  45. Yonsei University, Seoul 120-749.
  46. CNP, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061.
  47. Indian Institute of Technology Madras, Chennai 600036.
  48. Osaka City University, Osaka 558-8585.
  49. Toho University, Funabashi 274-8510.
  50. Kanagawa University, Yokohama 221-8686.
  51. Seoul National University, Seoul 151-742.
  52. Luther College, Decorah, Iowa 52101.
  53. University of Pittsburgh, Pittsburgh, Pennsylvania 15260.
  54. École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015.
  55. University of the Basque Country UPV/EHU, 48080 Bilbao.
  56. IKERBASQUE, Basque Foundation for Science, 48013 Bilbao.
  57. Institute of High Energy Physics, Vienna 1050.
  58. University of Cincinnati, Cincinnati, Ohio 45221.
  59. Yamagata University, Yamagata 990-8560.
  60. Beihang University, Beijing 100191.
  61. Tokyo Institute of Technology, Tokyo 152-8550.
  62. Institute for High Energy Physics, Protvino 142281.
  63. INFN-Sezione di Torino, 10125 Torino.
  64. University of Torino, 10124 Torino.
  65. National United University, Miao Li 36003.
  66. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049.
  67. University of Science and Technology of China, Hefei 230026.

PMID: 25933306 DOI: 10.1103/PhysRevLett.114.151601

Abstract

We report the measurement of the direct CP asymmetry in the radiative B¯→X(s+dγ) decay using a data sample of (772 ± 11)×10(6) BB[over ¯] pairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The CP asymmetry is measured as a function of the photon energy threshold. For Eγ*≥2.1  GeV, where Eγ* is the photon energy in the center-of-mass frame, we obtain A(CP)(B¯→X(s+dγ))=(2.2±3.9±0.9)%, consistent with the standard model prediction.

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