Search for the rare decay of B+ -> l(+)nu e gamma with improved hadronic tagging

Gelb, M.; Bernlochner, F. U.; Goldenzweig, P.; Metzner, F.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aushev, T.; Ayad, R.; Babu, V.; Badhrees, I.; Bansal, V.; Behera, P.; Beleno, C.; Bhuyan, B.; Biswal, J.; Bobrov, A.; Bracko, M.; Braun, N.; Cao, L.; Cervenkov, D.; Chekelian, V.; Chen, A.; Cheon, Byung Gu; Chilikin, K.; Cho, K.; Choi, S-K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; Dash, N.; Di Carlo, S.; Dolezal, Z.; Dong, T. V.; Eidelman, S.; Epifanov, D.; Fast, J. E.; Ferber, T.; Frey, A.; Fulsom, B. G.; Garg, R.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gemmler, J.; Giri, A.; Greenwald, D.; Haba, J.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hou, W-S.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jia, S.; Jin, Y.; Joffe, D.; Joo, K. K.; Kahn, J.; Kaliyar, A. B.; Kawasaki, T.; Kichimi, H.; Kiesling, C.; Kim, D. Y.; Kim, H. J.; Kim, S. H.; Kodys, P.; Korpar, S.; Kotchetkov, D.; Krizan, P.; Kroeger, R.; Krokovny, P.; Kuhr, T.; Kulasiri, R.; Kuzmin, A.; Kwon, Y-J.; Lange, J. S.; Lee, I. S.; Lee, J. K.; Lee, J. Y.; Lee, S. C.; Li, Y. B.; Li Gioi, L.; Libby, J.; Liventsev, D.; Lu, P-C.; Lubej, M.; Luo, T.; MacNaughton, J.; Masuda, M.; Merola, M.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Mori, T.; Mrvar, M.; Mussa, R.; Nakao, M.; Nath, K. J.; Natkaniec, Z.; Nayak, M.; Niiyama, M.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Pardi, S.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Popov, V.; Prencipe, E.; Prim, M.; Ritter, M.; Rostomyan, A.; Russo, G.; Sahoo, D.; Sakai, Y.; Salehi, M.; Sandilya, S.; Santelj, L.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schueler, J.; Schwanda, C.; Seino, Y.; Senyo, K.; Seon, O.; Sevior, M. E.; Shen, C. P.; Shibata, T-A.; Shiu, J-G.; Shwartz, B.; Simon, F.; Solovieva, E.; Stanic, S.; Staric, M.; Strube, J. F.; Sumihama, M.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tanida, K.; Tao, Y.; Tenchini, F.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Van Tonder, R.; Varner, G.; Varvell, K. E.; Wang, B.; Wang, C. H.; Wang, M-Z.; Wang, P.; Wang, X. L.; Watanabe, M.; Watanuki, S.; Widmann, E.; Won, E.; Yamamoto, H.; Yang, S. B.; Ye, H.; Yin, J. H.; Yuan, C. Z.; Yusa, Y.; Zakharov, S.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.; Zhulanov, V.

doi:10.1103/PhysRevD.98.112016

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Search for the rare decay of B+ -> l(+)nu e gamma with improved hadronic tagging

Search for the rare decay of B+→ℓ+νℓγ with improved hadronic tagging Search for the rare decay of B+ →+νγ with improved hadronic tagging

Gelb, M.;
Bernlochner, F. U.;
Goldenzweig, P.;
Metzner, F.;
Adachi, I.;
... Cheon, Byung Gu;
외 181명

Citations

WEB OF SCIENCE

25

Citations

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31

초록

We present the result of the search for the rare B meson decay of B+ -> l(+)nu e gamma with l = e, mu. For the search the full data set recorded by the Belle experiment of 711 fb(-1) integrated luminosity near the Upsilon(4S) resonance is used. Signal candidates are reconstructed for photon energies E-gamma larger than 1 GeV using a novel multivariate tagging algorithm. The novel algorithm fully reconstructs the second B meson produced in the collision using hadronic modes and was specifically trained to recognize the signal signature in combination with hadronic tag-side B meson decays. This approach greatly enhances the performance. Background processes that can mimic this signature, mainly charmless semileptonic decays and continuum processes, are suppressed using multivariate methods. The number of signal candidates is determined by analyzing the missing mass squared distribution as inferred from the signal side particles and the kinematic properties of the tag-side B meson. No significant excess over the background-only hypothesis is observed and upper limits on the partial branching fraction Delta B with E-gamma > 1 GeV individually for electron and muon final states as well as for the average branching fraction of both lepton final states are reported. We find a Bayesian upper limit of Delta B(B+ -> l(+)nu el) < 3.0 x 10(-6) at 90% CL and also report an upper limit on the first inverse moment of the light-cone distribution amplitude of the B meson of lambda(B) > 0.24 GeV at 90% CL.

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MESON DECAYS; IDENTIFICATION; SYMMETRY

제목: Search for the rare decay of B+ -> l(+)nu e gamma with improved hadronic tagging

제목 (타언어): Search for the rare decay of B+→ℓ+νℓγ with improved hadronic tagging Search for the rare decay of B+ →+νγ with improved hadronic tagging

저자: Gelb, M.; Bernlochner, F. U.; Goldenzweig, P.; Metzner, F.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Atmacan, H.; Aushev, T.; Ayad, R.; Babu, V.; Badhrees, I.; Bansal, V.; Behera, P.; Beleno, C.; Bhuyan, B.; Biswal, J.; Bobrov, A.; Bracko, M.; Braun, N.; Cao, L.; Cervenkov, D.; Chekelian, V.; Chen, A.; Cheon, Byung Gu; Chilikin, K.; Cho, K.; Choi, S-K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; Dash, N.; Di Carlo, S.; Dolezal, Z.; Dong, T. V.; Eidelman, S.; Epifanov, D.; Fast, J. E.; Ferber, T.; Frey, A.; Fulsom, B. G.; Garg, R.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gemmler, J.; Giri, A.; Greenwald, D.; Haba, J.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hou, W-S.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jia, S.; Jin, Y.; Joffe, D.; Joo, K. K.; Kahn, J.; Kaliyar, A. B.; Kawasaki, T.; Kichimi, H.; Kiesling, C.; Kim, D. Y.; Kim, H. J.; Kim, S. H.; Kodys, P.; Korpar, S.; Kotchetkov, D.; Krizan, P.; Kroeger, R.; Krokovny, P.; Kuhr, T.; Kulasiri, R.; Kuzmin, A.; Kwon, Y-J.; Lange, J. S.; Lee, I. S.; Lee, J. K.; Lee, J. Y.; Lee, S. C.; Li, Y. B.; Li Gioi, L.; Libby, J.; Liventsev, D.; Lu, P-C.; Lubej, M.; Luo, T.; MacNaughton, J.; Masuda, M.; Merola, M.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Mori, T.; Mrvar, M.; Mussa, R.; Nakao, M.; Nath, K. J.; Natkaniec, Z.; Nayak, M.; Niiyama, M.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Pardi, S.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Popov, V.; Prencipe, E.; Prim, M.; Ritter, M.; Rostomyan, A.; Russo, G.; Sahoo, D.; Sakai, Y.; Salehi, M.; Sandilya, S.; Santelj, L.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schueler, J.; Schwanda, C.; Seino, Y.; Senyo, K.; Seon, O.; Sevior, M. E.; Shen, C. P.; Shibata, T-A.; Shiu, J-G.; Shwartz, B.; Simon, F.; Solovieva, E.; Stanic, S.; Staric, M.; Strube, J. F.; Sumihama, M.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tanida, K.; Tao, Y.; Tenchini, F.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Van Tonder, R.; Varner, G.; Varvell, K. E.; Wang, B.; Wang, C. H.; Wang, M-Z.; Wang, P.; Wang, X. L.; Watanabe, M.; Watanuki, S.; Widmann, E.; Won, E.; Yamamoto, H.; Yang, S. B.; Ye, H.; Yin, J. H.; Yuan, C. Z.; Yusa, Y.; Zakharov, S.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.; Zhulanov, V.

DOI: 10.1103/PhysRevD.98.112016

발행일: 2018-12

유형: Article

저널명: Physical Review d

권: 98

호: 11

페이지: 1 ~ 13

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Search for the rare decay of B+ -> l(+)nu e gamma with improved hadronic tagging

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