Measurement of the direct CP asymmetry in B ¯ →xs+dγ decays with a lepton tag

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

doi:10.1103/PhysRevLett.114.151601

Measurement of the direct CP asymmetry in B ¯ →xs+dγ decays with a lepton tag

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

University of Bonn
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University of Tabuk
The Graduate University for Advanced Studies
High Energy Accelerator Research Organization, Tsukuba
H. Niewodniczanski Institute of Nuclear Physics
The University of Tokyo
King Abdulaziz University
Novosibirsk State University
Pacific Northwest National Laboratory
Alikhanov Institute for Theoretical and Experimental Physics
Moscow Institute of Physics and Technology
Indian Institute of Technology Bhubaneswar
The University of Sydney
Nara Women's University
Indian Institute of Technology Guwahati
Wayne State University
Jožef Stefan Institute
University of Maribor
University of Hawai'i at Mānoa
Charles University
Max Planck Institute for Physics (Werner Heisenberg Institute)
National Central University
Hanyang University
Korea Institute of Science and Technology Information
Sungkyunkwan University
Technische Universität München
Moscow Engineering Physics Institute
German Electron Synchrotron
Tata Institute of Fundamental Research
Justus Liebig University Giessen
University of Ljubljana
Peking University
Karlsruhe Institute of Technology
Tohoku University
National Taiwan University
Nagoya University
Kennesaw State University
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Soongsil University
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Tokyo Metropolitan University
Yonsei University
Virginia Polytechnic Institute and State University
Indian Institute of Technology Madras
Osaka Metropolitan University
Toho University
Kanagawa University
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Kyungpook National University
Luther College, Decorah
University of Pittsburgh
Swiss Federal Institute of Technology Lausanne
University of the Basque Country
Ikerbasque Basque Foundation for Science
Austrian Academy of Sciences
University of Cincinnati
Yamagata University
Beihang University
Institute of Science Tokyo
Institute for High Energy Physics
National Institute for Nuclear Physics
University of Turin
National United University Taiwan
CAS - Institute of High Energy Physics
University of Science and Technology of China

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10 Scopus citations

Abstract

We report the measurement of the direct CP asymmetry in the radiative B¯→Xs+dγ decay using a data sample of (772±11)×106 BB¯ pairs collected at the (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∗≥2.1GeV, where Eγ∗ is the photon energy in the center-of-mass frame, we obtain ACP(B¯→Xs+dγ)=(2.2±3.9±0.9)%, consistent with the standard model prediction.

Original language	English
Article number	151601
Journal	Physical Review Letters
Volume	114
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.114.151601
State	Published - 15 Apr 2015

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10.1103/PhysRevLett.114.151601

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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., ... Zupanc, A. (2015). Measurement of the direct CP asymmetry in B ¯ →xs+dγ decays with a lepton tag. Physical Review Letters, 114(15), Article 151601. https://doi.org/10.1103/PhysRevLett.114.151601

@article{c8db928027f342cd958b9bcab38ae69b,

title = "Measurement of the direct CP asymmetry in B ¯ →xs+dγ decays with a lepton tag",

abstract = "We report the measurement of the direct CP asymmetry in the radiative B¯→Xs+dγ decay using a data sample of (772±11)×106 BB¯ pairs collected at the (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∗≥2.1GeV, where Eγ∗ is the photon energy in the center-of-mass frame, we obtain ACP(B¯→Xs+dγ)=(2.2±3.9±0.9)\%, consistent with the standard model prediction.",

author = "L. Pes{\'a}ntez and P. Urquijo and J. Dingfelder and A. Abdesselam and I. Adachi and K. Adamczyk and H. Aihara and \{Al Said\}, S. and K. Arinstein and Asner, \{D. M.\} and V. Aulchenko and T. Aushev and R. Ayad and S. Bahinipati and Bakich, \{A. M.\} and V. Bansal and E. Barberio and V. Bhardwaj and B. Bhuyan and A. Bobrov and A. Bondar and G. Bonvicini and A. Bozek and M. Bra{\v c}ko and Browder, \{T. E.\} and D. {\v C}ervenkov and V. Chekelian and A. Chen and Cheon, \{B. G.\} and K. Chilikin and R. Chistov and K. Cho and V. Chobanova and Y. Choi and D. Cinabro and J. Dalseno and Z. Dole{\v Z}al and Z. Dr{\'a}sal and A. Drutskoy and D. Dutta and S. Eidelman and H. Farhat and Fast, \{J. E.\} and T. Ferber and O. Frost and V. Gaur and N. Gabyshev and S. Ganguly and A. Garmash and D. Getzkow and R. Gillard and Goh, \{Y. M.\} and B. Golob and J. Haba and J. Hasenbusch and H. Hayashii and He, \{X. H.\} and A. Heller and T. Horiguchi and Hou, \{W. S.\} and M. Huschle and T. Iijima and K. Inami and A. Ishikawa and R. Itoh and Y. Iwasaki and I. Jaegle and D. Joffe and T. Julius and Kang, \{K. H.\} and E. Kato and T. Kawasaki and C. Kiesling and Kim, \{D. Y.\} and Kim, \{J. B.\} and Kim, \{J. H.\} and Kim, \{K. T.\} and Kim, \{M. J.\} and Kim, \{S. H.\} and Kim, \{Y. J.\} and Ko, \{B. R.\} and P. Kody{\v s} and S. Korpar and P. Kri{\v Z}an and P. Krokovny and B. Kronenbitter and T. Kuhr and T. Kumita and A. Kuzmin and Kwon, \{Y. J.\} and Lange, \{J. S.\} and Lee, \{I. S.\} and Y. Li and \{Li Gioi\}, L. and J. Libby and D. Liventsev and P. Lukin and D. Matvienko and K. Miyabayashi and H. Miyata and R. Mizuk and Mohanty, \{G. B.\} and A. Moll and Moon, \{H. K.\} and E. Nakano and M. Nakao and T. Nanut and Z. Natkaniec and M. Nayak and C. Ng and Nisar, \{N. K.\} and S. Nishida and S. Ogawa and S. Okuno and Olsen, \{S. L.\} and C. Oswald and P. Pakhlov and G. Pakhlova and Park, \{C. W.\} and H. Park and Pedlar, \{T. K.\} and R. Pestotnik and M. Petri{\v c} and Piilonen, \{L. E.\} and E. Ribe{\v Z}l and M. Ritter and A. Rostomyan and M. Rozanska and Y. Sakai and S. Sandilya and L. Santelj and T. Sanuki and Y. Sato and V. Savinov and O. Schneider and G. Schnell and C. Schwanda and Schwartz, \{A. J.\} and K. Senyo and O. Seon and Sevior, \{M. E.\} and V. Shebalin and Shen, \{C. P.\} and Shibata, \{T. A.\} and Shiu, \{J. G.\} and B. Shwartz and A. Sibidanov and F. Simon and Sohn, \{Y. S.\} and A. Sokolov and E. Solovieva and M. Stari{\v c} and M. Steder and T. Sumiyoshi and U. Tamponi and N. Taniguchi and G. Tatishvili and Y. Teramoto and K. Trabelsi and M. Uchida and T. Uglov and Y. Unno and S. Uno and Y. Usov and \{Van Hulse\}, C. and P. Vanhoefer and G. Varner and A. Vinokurova and V. Vorobyev and Wagner, \{M. N.\} and B. Wang and Wang, \{C. H.\} and Wang, \{M. Z.\} and P. Wang and Y. Watanabe and Williams, \{K. M.\} and E. Won and J. Yamaoka and S. Yashchenko and Y. Yook and Zhang, \{Z. P.\} and V. Zhilich and V. Zhulanov and A. Zupanc",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = apr,

day = "15",

doi = "10.1103/PhysRevLett.114.151601",

language = "English",

volume = "114",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "15",

}

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 2015, 'Measurement of the direct CP asymmetry in B ¯ →xs+dγ decays with a lepton tag', Physical Review Letters, vol. 114, no. 15, 151601. https://doi.org/10.1103/PhysRevLett.114.151601

TY - JOUR

T1 - Measurement of the direct CP asymmetry in B ¯ →xs+dγ decays with a lepton tag

AU - Pesántez, L.

AU - Urquijo, P.

AU - Dingfelder, J.

AU - Abdesselam, A.

AU - Adachi, I.

AU - Adamczyk, K.

AU - Aihara, H.

AU - Al Said, S.

AU - Arinstein, K.

AU - Asner, D. M.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Ayad, R.

AU - Bahinipati, S.

AU - Bakich, A. M.

AU - Bansal, V.

AU - Barberio, E.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Bobrov, A.

AU - Bondar, A.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Červenkov, D.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Chistov, R.

AU - Cho, K.

AU - Chobanova, V.

AU - Choi, Y.

AU - Cinabro, D.

AU - Dalseno, J.

AU - DoleŽal, Z.

AU - Drásal, Z.

AU - Drutskoy, A.

AU - Dutta, D.

AU - Eidelman, S.

AU - Farhat, H.

AU - Fast, J. E.

AU - Ferber, T.

AU - Frost, O.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Ganguly, S.

AU - Garmash, A.

AU - Getzkow, D.

AU - Gillard, R.

AU - Goh, Y. M.

AU - Golob, B.

AU - Haba, J.

AU - Hasenbusch, J.

AU - Hayashii, H.

AU - He, X. H.

AU - Heller, A.

AU - Horiguchi, T.

AU - Hou, W. S.

AU - Huschle, M.

AU - Iijima, T.

AU - Inami, K.

AU - Ishikawa, A.

AU - Itoh, R.

AU - Iwasaki, Y.

AU - Jaegle, I.

AU - Joffe, D.

AU - Julius, T.

AU - Kang, K. H.

AU - Kato, E.

AU - Kawasaki, T.

AU - Kiesling, C.

AU - Kim, D. Y.

AU - Kim, J. B.

AU - Kim, J. H.

AU - Kim, K. T.

AU - Kim, M. J.

AU - Kim, S. H.

AU - Kim, Y. J.

AU - Ko, B. R.

AU - Kodyš, P.

AU - Korpar, S.

AU - KriŽan, P.

AU - Krokovny, P.

AU - Kronenbitter, B.

AU - Kuhr, T.

AU - Kumita, T.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Lange, J. S.

AU - Lee, I. S.

AU - Li, Y.

AU - Li Gioi, L.

AU - Libby, J.

AU - Liventsev, D.

AU - Lukin, P.

AU - Matvienko, D.

AU - Miyabayashi, K.

AU - Miyata, H.

AU - Mizuk, R.

AU - Mohanty, G. B.

AU - Moll, A.

AU - Moon, H. K.

AU - Nakano, E.

AU - Nakao, M.

AU - Nanut, T.

AU - Natkaniec, Z.

AU - Nayak, M.

AU - Ng, C.

AU - Nisar, N. K.

AU - Nishida, S.

AU - Ogawa, S.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Oswald, C.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Park, C. W.

AU - Park, H.

AU - Pedlar, T. K.

AU - Pestotnik, R.

AU - Petrič, M.

AU - Piilonen, L. E.

AU - RibeŽl, E.

AU - Ritter, M.

AU - Rostomyan, A.

AU - Rozanska, M.

AU - Sakai, Y.

AU - Sandilya, S.

AU - Santelj, L.

AU - Sanuki, T.

AU - Sato, Y.

AU - Savinov, V.

AU - Schneider, O.

AU - Schnell, G.

AU - Schwanda, C.

AU - Schwartz, A. J.

AU - Senyo, K.

AU - Seon, O.

AU - Sevior, M. E.

AU - Shebalin, V.

AU - Shen, C. P.

AU - Shibata, T. A.

AU - Shiu, J. G.

AU - Shwartz, B.

AU - Sibidanov, A.

AU - Simon, F.

AU - Sohn, Y. S.

AU - Sokolov, A.

AU - Solovieva, E.

AU - Starič, M.

AU - Steder, M.

AU - Sumiyoshi, T.

AU - Tamponi, U.

AU - Taniguchi, N.

AU - Tatishvili, G.

AU - Teramoto, Y.

AU - Trabelsi, K.

AU - Uchida, M.

AU - Uglov, T.

AU - Unno, Y.

AU - Uno, S.

AU - Usov, Y.

AU - Van Hulse, C.

AU - Vanhoefer, P.

AU - Varner, G.

AU - Vinokurova, A.

AU - Vorobyev, V.

AU - Wagner, M. N.

AU - Wang, B.

AU - Wang, C. H.

AU - Wang, M. Z.

AU - Wang, P.

AU - Watanabe, Y.

AU - Williams, K. M.

AU - Won, E.

AU - Yamaoka, J.

AU - Yashchenko, S.

AU - Yook, Y.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zhulanov, V.

AU - Zupanc, A.

PY - 2015/4/15

Y1 - 2015/4/15

N2 - We report the measurement of the direct CP asymmetry in the radiative B¯→Xs+dγ decay using a data sample of (772±11)×106 BB¯ pairs collected at the (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∗≥2.1GeV, where Eγ∗ is the photon energy in the center-of-mass frame, we obtain ACP(B¯→Xs+dγ)=(2.2±3.9±0.9)%, consistent with the standard model prediction.

AB - We report the measurement of the direct CP asymmetry in the radiative B¯→Xs+dγ decay using a data sample of (772±11)×106 BB¯ pairs collected at the (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∗≥2.1GeV, where Eγ∗ is the photon energy in the center-of-mass frame, we obtain ACP(B¯→Xs+dγ)=(2.2±3.9±0.9)%, consistent with the standard model prediction.

UR - https://www.scopus.com/pages/publications/84929578177

U2 - 10.1103/PhysRevLett.114.151601

DO - 10.1103/PhysRevLett.114.151601

M3 - Article

AN - SCOPUS:84929578177

SN - 0031-9007

VL - 114

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

M1 - 151601

ER -

Measurement of the direct CP asymmetry in B ¯ →xs+dγ decays with a lepton tag

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