Observation of B+→D̄*0τ+ντ and evidence for B+→D̄0τ+ντ at Belle

A. Bozek; M. Rozanska; I. Adachi; H. Aihara; K. Arinstein; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; V. Bhardwaj; M. Bischofberger; A. Bondar; M. Bračko; T. E. Browder; Y. Chao; A. Chen; B. G. Cheon; I. S. Cho; K. S. Choi; Y. Choi; J. Dalseno; Z. Doležal; Z. Drásal; A. Drutskoy; W. Dungel; S. Eidelman; P. Goldenzweig; B. Golob; H. Ha; K. Hara; Y. Hasegawa; H. Hayashii; T. Higuchi; Y. Horii; Y. Hoshi; W. S. Hou; H. J. Hyun; T. Iijima; K. Inami; M. Iwabuchi; Y. Iwasaki; N. J. Joshi; J. H. Kang; P. Kapusta; H. Kawai; T. Kawasaki; H. Kichimi; C. Kiesling; H. O. Kim; J. H. Kim; M. J. Kim; S. K. Kim; Y. J. Kim; B. R. Ko; S. Korpar; P. Krišan; P. Krokovny; T. Kuhr; T. Kumita; A. Kuzmin; Y. J. Kwon; S. H. Kyeong; M. J. Lee; S. H. Lee; J. Li; D. Liventsev; R. Louvot; A. Matyja; S. McOnie; H. Miyata; Y. Miyazaki; R. Mizuk; G. B. Mohanty; E. Nakano; M. Nakao; H. Nakazawa; S. Neubauer; S. Nishida; O. Nitoh; T. Nozaki; S. Ogawa; T. Ohshima; S. Okuno; S. L. Olsen; W. Ostrowicz; P. Pakhlov; G. Pakhlova; C. W. Park; H. K. Park; R. Pestotnik; M. Petrič; L. E. Piilonen; H. Sahoo; Y. Sakai; O. Schneider; J. Schümann; C. Schwanda; A. J. Schwartz; K. Senyo; J. G. Shiu; B. Shwartz; R. Sinha; P. Smerkol; A. Sokolov; E. Solovieva; M. Starič; J. Stypula; T. Sumiyoshi; G. N. Taylor; Y. Teramoto; I. Tikhomirov; K. Trabelsi; S. Uehara; Y. Unno; S. Uno; G. Varner; K. E. Varvell; K. Vervink; C. H. Wang; M. Z. Wang; P. Wang; Y. Watanabe; R. Wedd; E. Won; B. D. Yabsley; Y. Yamashita; V. Zhulanov; T. Zivko; A. Zupanc

doi:10.1103/PhysRevD.82.072005

Observation of B+→D̄*0τ+ν_τ and evidence for B+→D̄0τ+ν_τ at Belle

A. Bozek, M. Rozanska, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Bhardwaj, M. Bischofberger, A. Bondar, M. Bračko, T. E. Browder, Y. Chao, A. Chen, B. G. Cheon, I. S. Cho, K. S. Choi, Y. ChoiJ. Dalseno, Z. Doležal, Z. Drásal, A. Drutskoy, W. Dungel, S. Eidelman, P. Goldenzweig, B. Golob, H. Ha, K. Hara, Y. Hasegawa, H. Hayashii, T. Higuchi, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, M. Iwabuchi, Y. Iwasaki, N. J. Joshi, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, C. Kiesling, H. O. Kim, J. H. Kim, M. J. Kim, S. K. Kim, Y. J. Kim, B. R. Ko, S. Korpar, P. Krišan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, M. J. Lee, S. H. Lee, J. Li, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, E. Nakano, M. Nakao, H. Nakazawa, S. Neubauer, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, W. Ostrowicz, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, K. Senyo, J. G. Shiu, B. Shwartz, R. Sinha, P. Smerkol, A. Sokolov, E. Solovieva, M. Starič, J. Stypula, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. Z. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, V. Zhulanov, T. Zivko, A. Zupanc

Department of Physics

Research output: Contribution to journal › Article › peer-review

151 Scopus citations

Abstract

We present measurements of B+→D̄ *0τ+ν_τ and B+→D̄0τ+ν_τ decays in a data sample of 657×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find 446-56+58 B+→D̄*0τ+ν_τ events with a significance of 8.1 standard deviations, and 146-41+42 B+→D̄0τ+ν _τ events with a significance of 3.5 standard deviations. The latter signal provides the first evidence for this decay mode. The measured branching fractions are B(B+→D̄*0τ+ν_τ)=(2. 12-0.27+0.28(stat)±0.29(syst))% and B(B+→D̄0τ+ν _τ)=(0.77±0.22(stat)±0.12(syst))%.

Original language	English
Article number	072005
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	82
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.82.072005
State	Published - 11 Oct 2010

Access to Document

10.1103/PhysRevD.82.072005

Cite this

Bozek, A., Rozanska, M., Adachi, I., Aihara, H., Arinstein, K., Aulchenko, V., Aushev, T., Aziz, T., Bakich, A. M., Bhardwaj, V., Bischofberger, M., Bondar, A., Bračko, M., Browder, T. E., Chao, Y., Chen, A., Cheon, B. G., Cho, I. S., Choi, K. S., ... Zupanc, A. (2010). Observation of B+→D̄*0τ+ν_τ and evidence for B+→D̄0τ+ν_τ at Belle. Physical Review D - Particles, Fields, Gravitation and Cosmology, 82(7), [072005]. https://doi.org/10.1103/PhysRevD.82.072005

Bozek, A. ; Rozanska, M. ; Adachi, I. ; Aihara, H. ; Arinstein, K. ; Aulchenko, V. ; Aushev, T. ; Aziz, T. ; Bakich, A. M. ; Bhardwaj, V. ; Bischofberger, M. ; Bondar, A. ; Bračko, M. ; Browder, T. E. ; Chao, Y. ; Chen, A. ; Cheon, B. G. ; Cho, I. S. ; Choi, K. S. ; Choi, Y. ; Dalseno, J. ; Doležal, Z. ; Drásal, Z. ; Drutskoy, A. ; Dungel, W. ; Eidelman, S. ; Goldenzweig, P. ; Golob, B. ; Ha, H. ; Hara, K. ; Hasegawa, Y. ; Hayashii, H. ; Higuchi, T. ; Horii, Y. ; Hoshi, Y. ; Hou, W. S. ; Hyun, H. J. ; Iijima, T. ; Inami, K. ; Iwabuchi, M. ; Iwasaki, Y. ; Joshi, N. J. ; Kang, J. H. ; Kapusta, P. ; Kawai, H. ; Kawasaki, T. ; Kichimi, H. ; Kiesling, C. ; Kim, H. O. ; Kim, J. H. ; Kim, M. J. ; Kim, S. K. ; Kim, Y. J. ; Ko, B. R. ; Korpar, S. ; Krišan, P. ; Krokovny, P. ; Kuhr, T. ; Kumita, T. ; Kuzmin, A. ; Kwon, Y. J. ; Kyeong, S. H. ; Lee, M. J. ; Lee, S. H. ; Li, J. ; Liventsev, D. ; Louvot, R. ; Matyja, A. ; McOnie, S. ; Miyata, H. ; Miyazaki, Y. ; Mizuk, R. ; Mohanty, G. B. ; Nakano, E. ; Nakao, M. ; Nakazawa, H. ; Neubauer, S. ; Nishida, S. ; Nitoh, O. ; Nozaki, T. ; Ogawa, S. ; Ohshima, T. ; Okuno, S. ; Olsen, S. L. ; Ostrowicz, W. ; Pakhlov, P. ; Pakhlova, G. ; Park, C. W. ; Park, H. K. ; Pestotnik, R. ; Petrič, M. ; Piilonen, L. E. ; Sahoo, H. ; Sakai, Y. ; Schneider, O. ; Schümann, J. ; Schwanda, C. ; Schwartz, A. J. ; Senyo, K. ; Shiu, J. G. ; Shwartz, B. ; Sinha, R. ; Smerkol, P. ; Sokolov, A. ; Solovieva, E. ; Starič, M. ; Stypula, J. ; Sumiyoshi, T. ; Taylor, G. N. ; Teramoto, Y. ; Tikhomirov, I. ; Trabelsi, K. ; Uehara, S. ; Unno, Y. ; Uno, S. ; Varner, G. ; Varvell, K. E. ; Vervink, K. ; Wang, C. H. ; Wang, M. Z. ; Wang, P. ; Watanabe, Y. ; Wedd, R. ; Won, E. ; Yabsley, B. D. ; Yamashita, Y. ; Zhulanov, V. ; Zivko, T. ; Zupanc, A. / Observation of B+→D̄*0τ+ν_τ and evidence for B+→D̄0τ+ν_τ at Belle. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2010 ; Vol. 82, No. 7.

@article{7efabeec2cab4c8997702f76a0e184fd,

title = "Observation of B+→{\=D}*0τ+ντ and evidence for B+→{\=D}0τ+ντ at Belle",

abstract = "We present measurements of B+→{\=D} *0τ+ντ and B+→{\=D}0τ+ντ decays in a data sample of 657×106 B{\=B} pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find 446-56+58 B+→{\=D}*0τ+ντ events with a significance of 8.1 standard deviations, and 146-41+42 B+→{\=D}0τ+ν τ events with a significance of 3.5 standard deviations. The latter signal provides the first evidence for this decay mode. The measured branching fractions are B(B+→{\=D}*0τ+ντ)=(2. 12-0.27+0.28(stat)±0.29(syst))% and B(B+→{\=D}0τ+ν τ)=(0.77±0.22(stat)±0.12(syst))%.",

author = "A. Bozek and M. Rozanska and I. Adachi and H. Aihara and K. Arinstein and V. Aulchenko and T. Aushev and T. Aziz and Bakich, {A. M.} and V. Bhardwaj and M. Bischofberger and A. Bondar and M. Bra{\v c}ko and Browder, {T. E.} and Y. Chao and A. Chen and Cheon, {B. G.} and Cho, {I. S.} and Choi, {K. S.} and Y. Choi and J. Dalseno and Z. Dole{\v z}al and Z. Dr{\'a}sal and A. Drutskoy and W. Dungel and S. Eidelman and P. Goldenzweig and B. Golob and H. Ha and K. Hara and Y. Hasegawa and H. Hayashii and T. Higuchi and Y. Horii and Y. Hoshi and Hou, {W. S.} and Hyun, {H. J.} and T. Iijima and K. Inami and M. Iwabuchi and Y. Iwasaki and Joshi, {N. J.} and Kang, {J. H.} and P. Kapusta and H. Kawai and T. Kawasaki and H. Kichimi and C. Kiesling and Kim, {H. O.} and Kim, {J. H.} and Kim, {M. J.} and Kim, {S. K.} and Kim, {Y. J.} and Ko, {B. R.} and S. Korpar and P. Kri{\v s}an and P. Krokovny and T. Kuhr and T. Kumita and A. Kuzmin and Kwon, {Y. J.} and Kyeong, {S. H.} and Lee, {M. J.} and Lee, {S. H.} and J. Li and D. Liventsev and R. Louvot and A. Matyja and S. McOnie and H. Miyata and Y. Miyazaki and R. Mizuk and Mohanty, {G. B.} and E. Nakano and M. Nakao and H. Nakazawa and S. Neubauer and S. Nishida and O. Nitoh and T. Nozaki and S. Ogawa and T. Ohshima and S. Okuno and Olsen, {S. L.} and W. Ostrowicz and P. Pakhlov and G. Pakhlova and Park, {C. W.} and Park, {H. K.} and R. Pestotnik and M. Petri{\v c} and Piilonen, {L. E.} and H. Sahoo and Y. Sakai and O. Schneider and J. Sch{\"u}mann and C. Schwanda and Schwartz, {A. J.} and K. Senyo and Shiu, {J. G.} and B. Shwartz and R. Sinha and P. Smerkol and A. Sokolov and E. Solovieva and M. Stari{\v c} and J. Stypula and T. Sumiyoshi and Taylor, {G. N.} and Y. Teramoto and I. Tikhomirov and K. Trabelsi and S. Uehara and Y. Unno and S. Uno and G. Varner and Varvell, {K. E.} and K. Vervink and Wang, {C. H.} and Wang, {M. Z.} and P. Wang and Y. Watanabe and R. Wedd and E. Won and Yabsley, {B. D.} and Y. Yamashita and V. Zhulanov and T. Zivko and A. Zupanc",

year = "2010",

month = oct,

day = "11",

doi = "10.1103/PhysRevD.82.072005",

language = "???core.languages.en_GB???",

volume = "82",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "7",

}

Bozek, A, Rozanska, M, Adachi, I, Aihara, H, Arinstein, K, Aulchenko, V, Aushev, T, Aziz, T, Bakich, AM, Bhardwaj, V, Bischofberger, M, Bondar, A, Bračko, M, Browder, TE, Chao, Y, Chen, A, Cheon, BG, Cho, IS, Choi, KS, Choi, Y, Dalseno, J, Doležal, Z, Drásal, Z, Drutskoy, A, Dungel, W, Eidelman, S, Goldenzweig, P, Golob, B, Ha, H, Hara, K, Hasegawa, Y, Hayashii, H, Higuchi, T, Horii, Y, Hoshi, Y, Hou, WS, Hyun, HJ, Iijima, T, Inami, K, Iwabuchi, M, Iwasaki, Y, Joshi, NJ, Kang, JH, Kapusta, P, Kawai, H, Kawasaki, T, Kichimi, H, Kiesling, C, Kim, HO, Kim, JH, Kim, MJ, Kim, SK, Kim, YJ, Ko, BR, Korpar, S, Krišan, P, Krokovny, P, Kuhr, T, Kumita, T, Kuzmin, A, Kwon, YJ, Kyeong, SH, Lee, MJ, Lee, SH, Li, J, Liventsev, D, Louvot, R, Matyja, A, McOnie, S, Miyata, H, Miyazaki, Y, Mizuk, R, Mohanty, GB, Nakano, E, Nakao, M, Nakazawa, H, Neubauer, S, Nishida, S, Nitoh, O, Nozaki, T, Ogawa, S, Ohshima, T, Okuno, S, Olsen, SL, Ostrowicz, W, Pakhlov, P, Pakhlova, G, Park, CW, Park, HK, Pestotnik, R, Petrič, M, Piilonen, LE, Sahoo, H, Sakai, Y, Schneider, O, Schümann, J, Schwanda, C, Schwartz, AJ, Senyo, K, Shiu, JG, Shwartz, B, Sinha, R, Smerkol, P, Sokolov, A, Solovieva, E, Starič, M, Stypula, J, Sumiyoshi, T, Taylor, GN, Teramoto, Y, Tikhomirov, I, Trabelsi, K, Uehara, S, Unno, Y, Uno, S, Varner, G, Varvell, KE, Vervink, K, Wang, CH, Wang, MZ, Wang, P, Watanabe, Y, Wedd, R, Won, E, Yabsley, BD, Yamashita, Y, Zhulanov, V, Zivko, T & Zupanc, A 2010, 'Observation of B+→D̄*0τ+ν_τ and evidence for B+→D̄0τ+ν_τ at Belle', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 82, no. 7, 072005. https://doi.org/10.1103/PhysRevD.82.072005

Observation of B+→D̄*0τ+ν_τ and evidence for B+→D̄0τ+ν_τ at Belle. / Bozek, A.; Rozanska, M.; Adachi, I.; Aihara, H.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Aziz, T.; Bakich, A. M.; Bhardwaj, V.; Bischofberger, M.; Bondar, A.; Bračko, M.; Browder, T. E.; Chao, Y.; Chen, A.; Cheon, B. G.; Cho, I. S.; Choi, K. S.; Choi, Y.; Dalseno, J.; Doležal, Z.; Drásal, Z.; Drutskoy, A.; Dungel, W.; Eidelman, S.; Goldenzweig, P.; Golob, B.; Ha, H.; Hara, K.; Hasegawa, Y.; Hayashii, H.; Higuchi, T.; Horii, Y.; Hoshi, Y.; Hou, W. S.; Hyun, H. J.; Iijima, T.; Inami, K.; Iwabuchi, M.; Iwasaki, Y.; Joshi, N. J.; Kang, J. H.; Kapusta, P.; Kawai, H.; Kawasaki, T.; Kichimi, H.; Kiesling, C.; Kim, H. O.; Kim, J. H.; Kim, M. J.; Kim, S. K.; Kim, Y. J.; Ko, B. R.; Korpar, S.; Krišan, P.; Krokovny, P.; Kuhr, T.; Kumita, T.; Kuzmin, A.; Kwon, Y. J.; Kyeong, S. H.; Lee, M. J.; Lee, S. H.; Li, J.; Liventsev, D.; Louvot, R.; Matyja, A.; McOnie, S.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Mohanty, G. B.; Nakano, E.; Nakao, M.; Nakazawa, H.; Neubauer, S.; Nishida, S.; Nitoh, O.; Nozaki, T.; Ogawa, S.; Ohshima, T.; Okuno, S.; Olsen, S. L.; Ostrowicz, W.; Pakhlov, P.; Pakhlova, G.; Park, C. W.; Park, H. K.; Pestotnik, R.; Petrič, M.; Piilonen, L. E.; Sahoo, H.; Sakai, Y.; Schneider, O.; Schümann, J.; Schwanda, C.; Schwartz, A. J.; Senyo, K.; Shiu, J. G.; Shwartz, B.; Sinha, R.; Smerkol, P.; Sokolov, A.; Solovieva, E.; Starič, M.; Stypula, J.; Sumiyoshi, T.; Taylor, G. N.; Teramoto, Y.; Tikhomirov, I.; Trabelsi, K.; Uehara, S.; Unno, Y.; Uno, S.; Varner, G.; Varvell, K. E.; Vervink, K.; Wang, C. H.; Wang, M. Z.; Wang, P.; Watanabe, Y.; Wedd, R.; Won, E.; Yabsley, B. D.; Yamashita, Y.; Zhulanov, V.; Zivko, T.; Zupanc, A.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 82, No. 7, 072005, 11.10.2010.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Observation of B+→D̄*0τ+ντ and evidence for B+→D̄0τ+ντ at Belle

AU - Bozek, A.

AU - Rozanska, M.

AU - Adachi, I.

AU - Aihara, H.

AU - Arinstein, K.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Aziz, T.

AU - Bakich, A. M.

AU - Bhardwaj, V.

AU - Bischofberger, M.

AU - Bondar, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Chao, Y.

AU - Chen, A.

AU - Cheon, B. G.

AU - Cho, I. S.

AU - Choi, K. S.

AU - Choi, Y.

AU - Dalseno, J.

AU - Doležal, Z.

AU - Drásal, Z.

AU - Drutskoy, A.

AU - Dungel, W.

AU - Eidelman, S.

AU - Goldenzweig, P.

AU - Golob, B.

AU - Ha, H.

AU - Hara, K.

AU - Hasegawa, Y.

AU - Hayashii, H.

AU - Higuchi, T.

AU - Horii, Y.

AU - Hoshi, Y.

AU - Hou, W. S.

AU - Hyun, H. J.

AU - Iijima, T.

AU - Inami, K.

AU - Iwabuchi, M.

AU - Iwasaki, Y.

AU - Joshi, N. J.

AU - Kang, J. H.

AU - Kapusta, P.

AU - Kawai, H.

AU - Kawasaki, T.

AU - Kichimi, H.

AU - Kiesling, C.

AU - Kim, H. O.

AU - Kim, J. H.

AU - Kim, M. J.

AU - Kim, S. K.

AU - Kim, Y. J.

AU - Ko, B. R.

AU - Korpar, S.

AU - Krišan, P.

AU - Krokovny, P.

AU - Kuhr, T.

AU - Kumita, T.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Kyeong, S. H.

AU - Lee, M. J.

AU - Lee, S. H.

AU - Li, J.

AU - Liventsev, D.

AU - Louvot, R.

AU - Matyja, A.

AU - McOnie, S.

AU - Miyata, H.

AU - Miyazaki, Y.

AU - Mizuk, R.

AU - Mohanty, G. B.

AU - Nakano, E.

AU - Nakao, M.

AU - Nakazawa, H.

AU - Neubauer, S.

AU - Nishida, S.

AU - Nitoh, O.

AU - Nozaki, T.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Ostrowicz, W.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Park, C. W.

AU - Park, H. K.

AU - Pestotnik, R.

AU - Petrič, M.

AU - Piilonen, L. E.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Schneider, O.

AU - Schümann, J.

AU - Schwanda, C.

AU - Schwartz, A. J.

AU - Senyo, K.

AU - Shiu, J. G.

AU - Shwartz, B.

AU - Sinha, R.

AU - Smerkol, P.

AU - Sokolov, A.

AU - Solovieva, E.

AU - Starič, M.

AU - Stypula, J.

AU - Sumiyoshi, T.

AU - Taylor, G. N.

AU - Teramoto, Y.

AU - Tikhomirov, I.

AU - Trabelsi, K.

AU - Uehara, S.

AU - Unno, Y.

AU - Uno, S.

AU - Varner, G.

AU - Varvell, K. E.

AU - Vervink, K.

AU - Wang, C. H.

AU - Wang, M. Z.

AU - Wang, P.

AU - Watanabe, Y.

AU - Wedd, R.

AU - Won, E.

AU - Yabsley, B. D.

AU - Yamashita, Y.

AU - Zhulanov, V.

AU - Zivko, T.

AU - Zupanc, A.

PY - 2010/10/11

Y1 - 2010/10/11

N2 - We present measurements of B+→D̄ *0τ+ντ and B+→D̄0τ+ντ decays in a data sample of 657×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find 446-56+58 B+→D̄*0τ+ντ events with a significance of 8.1 standard deviations, and 146-41+42 B+→D̄0τ+ν τ events with a significance of 3.5 standard deviations. The latter signal provides the first evidence for this decay mode. The measured branching fractions are B(B+→D̄*0τ+ντ)=(2. 12-0.27+0.28(stat)±0.29(syst))% and B(B+→D̄0τ+ν τ)=(0.77±0.22(stat)±0.12(syst))%.

AB - We present measurements of B+→D̄ *0τ+ντ and B+→D̄0τ+ντ decays in a data sample of 657×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find 446-56+58 B+→D̄*0τ+ντ events with a significance of 8.1 standard deviations, and 146-41+42 B+→D̄0τ+ν τ events with a significance of 3.5 standard deviations. The latter signal provides the first evidence for this decay mode. The measured branching fractions are B(B+→D̄*0τ+ντ)=(2. 12-0.27+0.28(stat)±0.29(syst))% and B(B+→D̄0τ+ν τ)=(0.77±0.22(stat)±0.12(syst))%.

UR - http://www.scopus.com/inward/record.url?scp=78651254642&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.82.072005

DO - 10.1103/PhysRevD.82.072005

M3 - 期刊論文

AN - SCOPUS:78651254642

VL - 82

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

IS - 7

M1 - 072005

ER -

Observation of B+→D̄*0τ+ντ and evidence for B+→D̄0τ+ντ at Belle

Abstract

Access to Document

Fingerprint

Cite this

Observation of B+→D̄*0τ+ν_τ and evidence for B+→D̄0τ+ν_τ at Belle