Measurement of CP violation in B0→D*-π+ and B0→D-π+ decays

F. J. Ronga, T. R. Sarangi, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek & 140 others M. Bračko, T. E. Browder, P. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, J. Haba, K. Hara, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, Ju Hwan Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Youngjoon Kwon, G. Leder, J. Lee, T. Lesiak, J. Li, A. Limosani, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, D. Mohapatra, T. Nagamine, I. Nakamura, E. Nakano, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, M. Rozanska, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, S. Suzuki, S. Y. Suzuki, F. Takasaki, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Zürcher

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

We report measurements of time-dependent decay rates for B0→D(*)-π+ decays and extraction of CP violation parameters that depend on 3. Using fully reconstructed D(*)π events and partially reconstructed D*π events from a data sample that contains 386×106 BB̄ pairs that was collected near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric energy e+e- collider, we obtain the CP violation parameters S+(D(*)π) and S-(D(*)π). We obtain S+(D*π)=0.049±0.020(stat)±0.011(sys), S-(D*π)=0.031±0.019(stat)±0.011(sys), and S+(Dπ)=0.031±0.030(stat)±0.012(sys), S-(Dπ)=0.068±0. 029(stat)±0.012(sys). These results are an indication of CP violation in B0→D*-π+ and B0→D-π+ decays at the 2.5σ and 2.2σ levels, respectively. If we use the values of RD(*)π that are derived using assumptions of factorization and SU(3) symmetry, branching fraction measurements for the B→Ds(*)π modes, and lattice QCD calculations, we can restrict the allowed region of |sin (2 1+ 3)| to be above 0.44 and 0.52 at 68% confidence level from the D*π and Dπ modes, respectively.

Original languageEnglish
Article number092003
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume73
Issue number9
DOIs
Publication statusPublished - 2006 Jun 5

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CP violation
decay
factorization
decay rates
confidence
indication
quantum chromodynamics
detectors
symmetry
energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Ronga, F. J., Sarangi, T. R., Abe, K., Adachi, I., Aihara, H., Anipko, D., ... Zürcher, D. (2006). Measurement of CP violation in B0→D*-π+ and B0→D-π+ decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 73(9), [092003]. https://doi.org/10.1103/PhysRevD.73.092003
Ronga, F. J. ; Sarangi, T. R. ; Abe, K. ; Adachi, I. ; Aihara, H. ; Anipko, D. ; Arinstein, K. ; Asano, Y. ; Aushev, T. ; Bahinipati, S. ; Bakich, A. M. ; Balagura, V. ; Barberio, E. ; Barbero, M. ; Belous, K. ; Bitenc, U. ; Bizjak, I. ; Blyth, S. ; Bondar, A. ; Bozek, A. ; Bračko, M. ; Browder, T. E. ; Chang, P. ; Chen, A. ; Chen, W. T. ; Cheon, B. G. ; Chistov, R. ; Choi, Y. ; Chuvikov, A. ; Dalseno, J. ; Danilov, M. ; Dash, M. ; Drutskoy, A. ; Eidelman, S. ; Epifanov, D. ; Fratina, S. ; Gabyshev, N. ; Garmash, A. ; Gershon, T. ; Gokhroo, G. ; Golob, B. ; Gorišek, A. ; Haba, J. ; Hara, K. ; Hara, T. ; Hayasaka, K. ; Hayashii, H. ; Hazumi, M. ; Higuchi, T. ; Hinz, L. ; Hokuue, T. ; Hoshi, Y. ; Hou, S. ; Hou, W. S. ; Iijima, T. ; Inami, K. ; Ishikawa, A. ; Ishino, H. ; Itoh, R. ; Iwasaki, Y. ; Kang, Ju Hwan ; Kawai, H. ; Kawasaki, T. ; Khan, H. R. ; Kim, H. J. ; Kinoshita, K. ; Korpar, S. ; Krokovny, P. ; Kulasiri, R. ; Kumar, R. ; Kuo, C. C. ; Kwon, Youngjoon ; Leder, G. ; Lee, J. ; Lesiak, T. ; Li, J. ; Limosani, A. ; Liventsev, D. ; Majumder, G. ; Mandl, F. ; Matsumoto, T. ; Mitaroff, W. ; Miyabayashi, K. ; Miyake, H. ; Miyata, H. ; Mohapatra, D. ; Nagamine, T. ; Nakamura, I. ; Nakano, E. ; Natkaniec, Z. ; Nishida, S. ; Nitoh, O. ; Noguchi, S. ; Nozaki, T. ; Ogawa, S. ; Ohshima, T. ; Okuno, S. ; Olsen, S. L. ; Onuki, Y. ; Pakhlov, P. ; Park, C. W. ; Park, H. ; Peak, L. S. ; Pestotnik, R. ; Piilonen, L. E. ; Poluektov, A. ; Rozanska, M. ; Sakai, Y. ; Sato, N. ; Satoyama, N. ; Sayeed, K. ; Schietinger, T. ; Schneider, O. ; Schwartz, A. J. ; Seidl, R. ; Senyo, K. ; Sevior, M. E. ; Shapkin, M. ; Shibuya, H. ; Shwartz, B. ; Singh, J. B. ; Sokolov, A. ; Somov, A. ; Soni, N. ; Stamen, R. ; Stanič, S. ; Starič, M. ; Stoeck, H. ; Sumisawa, K. ; Suzuki, S. ; Suzuki, S. Y. ; Takasaki, F. ; Tanaka, M. ; Teramoto, Y. ; Tian, X. C. ; Trabelsi, K. ; Tsukamoto, T. ; Uehara, S. ; Ueno, K. ; Uno, S. ; Urquijo, P. ; Ushiroda, Y. ; Usov, Y. ; Varner, G. ; Varvell, K. E. ; Villa, S. ; Wang, C. H. ; Watanabe, Y. ; Won, E. ; Xie, Q. L. ; Yabsley, B. D. ; Yamaguchi, A. ; Yamashita, Y. ; Yamauchi, M. ; Ying, J. ; Zhang, C. C. ; Zhang, L. M. ; Zhang, Z. P. ; Zhilich, V. ; Zürcher, D. / Measurement of CP violation in B0→D*-π+ and B0→D-π+ decays. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2006 ; Vol. 73, No. 9.
@article{78139fd6780f4f3087ea72326cf3a9f9,
title = "Measurement of CP violation in B0→D*-π+ and B0→D-π+ decays",
abstract = "We report measurements of time-dependent decay rates for B0→D(*)-π+ decays and extraction of CP violation parameters that depend on 3. Using fully reconstructed D(*)π events and partially reconstructed D*π events from a data sample that contains 386×106 BB̄ pairs that was collected near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric energy e+e- collider, we obtain the CP violation parameters S+(D(*)π) and S-(D(*)π). We obtain S+(D*π)=0.049±0.020(stat)±0.011(sys), S-(D*π)=0.031±0.019(stat)±0.011(sys), and S+(Dπ)=0.031±0.030(stat)±0.012(sys), S-(Dπ)=0.068±0. 029(stat)±0.012(sys). These results are an indication of CP violation in B0→D*-π+ and B0→D-π+ decays at the 2.5σ and 2.2σ levels, respectively. If we use the values of RD(*)π that are derived using assumptions of factorization and SU(3) symmetry, branching fraction measurements for the B→Ds(*)π modes, and lattice QCD calculations, we can restrict the allowed region of |sin (2 1+ 3)| to be above 0.44 and 0.52 at 68{\%} confidence level from the D*π and Dπ modes, respectively.",
author = "Ronga, {F. J.} and Sarangi, {T. R.} and K. Abe and I. Adachi and H. Aihara and D. Anipko and K. Arinstein and Y. Asano and T. Aushev and S. Bahinipati and Bakich, {A. M.} and V. Balagura and E. Barberio and M. Barbero and K. Belous and U. Bitenc and I. Bizjak and S. Blyth and A. Bondar and A. Bozek and M. Bračko and Browder, {T. E.} and P. Chang and A. Chen and Chen, {W. T.} and Cheon, {B. G.} and R. Chistov and Y. Choi and A. Chuvikov and J. Dalseno and M. Danilov and M. Dash and A. Drutskoy and S. Eidelman and D. Epifanov and S. Fratina and N. Gabyshev and A. Garmash and T. Gershon and G. Gokhroo and B. Golob and A. Gorišek and J. Haba and K. Hara and T. Hara and K. Hayasaka and H. Hayashii and M. Hazumi and T. Higuchi and L. Hinz and T. Hokuue and Y. Hoshi and S. Hou and Hou, {W. S.} and T. Iijima and K. Inami and A. Ishikawa and H. Ishino and R. Itoh and Y. Iwasaki and Kang, {Ju Hwan} and H. Kawai and T. Kawasaki and Khan, {H. R.} and Kim, {H. J.} and K. Kinoshita and S. Korpar and P. Krokovny and R. Kulasiri and R. Kumar and Kuo, {C. C.} and Youngjoon Kwon and G. Leder and J. Lee and T. Lesiak and J. Li and A. Limosani and D. Liventsev and G. Majumder and F. Mandl and T. Matsumoto and W. Mitaroff and K. Miyabayashi and H. Miyake and H. Miyata and D. Mohapatra and T. Nagamine and I. Nakamura and E. Nakano and Z. Natkaniec and S. Nishida and O. Nitoh and S. Noguchi and T. Nozaki and S. Ogawa and T. Ohshima and S. Okuno and Olsen, {S. L.} and Y. Onuki and P. Pakhlov and Park, {C. W.} and H. Park and Peak, {L. S.} and R. Pestotnik and Piilonen, {L. E.} and A. Poluektov and M. Rozanska and Y. Sakai and N. Sato and N. Satoyama and K. Sayeed and T. Schietinger and O. Schneider and Schwartz, {A. J.} and R. Seidl and K. Senyo and Sevior, {M. E.} and M. Shapkin and H. Shibuya and B. Shwartz and Singh, {J. B.} and A. Sokolov and A. Somov and N. Soni and R. Stamen and S. Stanič and M. Starič and H. Stoeck and K. Sumisawa and S. Suzuki and Suzuki, {S. Y.} and F. Takasaki and M. Tanaka and Y. Teramoto and Tian, {X. C.} and K. Trabelsi and T. Tsukamoto and S. Uehara and K. Ueno and S. Uno and P. Urquijo and Y. Ushiroda and Y. Usov and G. Varner and Varvell, {K. E.} and S. Villa and Wang, {C. H.} and Y. Watanabe and E. Won and Xie, {Q. L.} and Yabsley, {B. D.} and A. Yamaguchi and Y. Yamashita and M. Yamauchi and J. Ying and Zhang, {C. C.} and Zhang, {L. M.} and Zhang, {Z. P.} and V. Zhilich and D. Z{\"u}rcher",
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Ronga, FJ, Sarangi, TR, Abe, K, Adachi, I, Aihara, H, Anipko, D, Arinstein, K, Asano, Y, Aushev, T, Bahinipati, S, Bakich, AM, Balagura, V, Barberio, E, Barbero, M, Belous, K, Bitenc, U, Bizjak, I, Blyth, S, Bondar, A, Bozek, A, Bračko, M, Browder, TE, Chang, P, Chen, A, Chen, WT, Cheon, BG, Chistov, R, Choi, Y, Chuvikov, A, Dalseno, J, Danilov, M, Dash, M, Drutskoy, A, Eidelman, S, Epifanov, D, Fratina, S, Gabyshev, N, Garmash, A, Gershon, T, Gokhroo, G, Golob, B, Gorišek, A, Haba, J, Hara, K, Hara, T, Hayasaka, K, Hayashii, H, Hazumi, M, Higuchi, T, Hinz, L, Hokuue, T, Hoshi, Y, Hou, S, Hou, WS, Iijima, T, Inami, K, Ishikawa, A, Ishino, H, Itoh, R, Iwasaki, Y, Kang, JH, Kawai, H, Kawasaki, T, Khan, HR, Kim, HJ, Kinoshita, K, Korpar, S, Krokovny, P, Kulasiri, R, Kumar, R, Kuo, CC, Kwon, Y, Leder, G, Lee, J, Lesiak, T, Li, J, Limosani, A, Liventsev, D, Majumder, G, Mandl, F, Matsumoto, T, Mitaroff, W, Miyabayashi, K, Miyake, H, Miyata, H, Mohapatra, D, Nagamine, T, Nakamura, I, Nakano, E, Natkaniec, Z, Nishida, S, Nitoh, O, Noguchi, S, Nozaki, T, Ogawa, S, Ohshima, T, Okuno, S, Olsen, SL, Onuki, Y, Pakhlov, P, Park, CW, Park, H, Peak, LS, Pestotnik, R, Piilonen, LE, Poluektov, A, Rozanska, M, Sakai, Y, Sato, N, Satoyama, N, Sayeed, K, Schietinger, T, Schneider, O, Schwartz, AJ, Seidl, R, Senyo, K, Sevior, ME, Shapkin, M, Shibuya, H, Shwartz, B, Singh, JB, Sokolov, A, Somov, A, Soni, N, Stamen, R, Stanič, S, Starič, M, Stoeck, H, Sumisawa, K, Suzuki, S, Suzuki, SY, Takasaki, F, Tanaka, M, Teramoto, Y, Tian, XC, Trabelsi, K, Tsukamoto, T, Uehara, S, Ueno, K, Uno, S, Urquijo, P, Ushiroda, Y, Usov, Y, Varner, G, Varvell, KE, Villa, S, Wang, CH, Watanabe, Y, Won, E, Xie, QL, Yabsley, BD, Yamaguchi, A, Yamashita, Y, Yamauchi, M, Ying, J, Zhang, CC, Zhang, LM, Zhang, ZP, Zhilich, V & Zürcher, D 2006, 'Measurement of CP violation in B0→D*-π+ and B0→D-π+ decays', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 73, no. 9, 092003. https://doi.org/10.1103/PhysRevD.73.092003

Measurement of CP violation in B0→D*-π+ and B0→D-π+ decays. / Ronga, F. J.; Sarangi, T. R.; Abe, K.; Adachi, I.; Aihara, H.; Anipko, D.; Arinstein, K.; Asano, Y.; Aushev, T.; Bahinipati, S.; Bakich, A. M.; Balagura, V.; Barberio, E.; Barbero, M.; Belous, K.; Bitenc, U.; Bizjak, I.; Blyth, S.; Bondar, A.; Bozek, A.; Bračko, M.; Browder, T. E.; Chang, P.; Chen, A.; Chen, W. T.; Cheon, B. G.; Chistov, R.; Choi, Y.; Chuvikov, A.; Dalseno, J.; Danilov, M.; Dash, M.; Drutskoy, A.; Eidelman, S.; Epifanov, D.; Fratina, S.; Gabyshev, N.; Garmash, A.; Gershon, T.; Gokhroo, G.; Golob, B.; Gorišek, A.; Haba, J.; Hara, K.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Higuchi, T.; Hinz, L.; Hokuue, T.; Hoshi, Y.; Hou, S.; Hou, W. S.; Iijima, T.; Inami, K.; Ishikawa, A.; Ishino, H.; Itoh, R.; Iwasaki, Y.; Kang, Ju Hwan; Kawai, H.; Kawasaki, T.; Khan, H. R.; Kim, H. J.; Kinoshita, K.; Korpar, S.; Krokovny, P.; Kulasiri, R.; Kumar, R.; Kuo, C. C.; Kwon, Youngjoon; Leder, G.; Lee, J.; Lesiak, T.; Li, J.; Limosani, A.; Liventsev, D.; Majumder, G.; Mandl, F.; Matsumoto, T.; Mitaroff, W.; Miyabayashi, K.; Miyake, H.; Miyata, H.; Mohapatra, D.; Nagamine, T.; Nakamura, I.; Nakano, E.; Natkaniec, Z.; Nishida, S.; Nitoh, O.; Noguchi, S.; Nozaki, T.; Ogawa, S.; Ohshima, T.; Okuno, S.; Olsen, S. L.; Onuki, Y.; Pakhlov, P.; Park, C. W.; Park, H.; Peak, L. S.; Pestotnik, R.; Piilonen, L. E.; Poluektov, A.; Rozanska, M.; Sakai, Y.; Sato, N.; Satoyama, N.; Sayeed, K.; Schietinger, T.; Schneider, O.; Schwartz, A. J.; Seidl, R.; Senyo, K.; Sevior, M. E.; Shapkin, M.; Shibuya, H.; Shwartz, B.; Singh, J. B.; Sokolov, A.; Somov, A.; Soni, N.; Stamen, R.; Stanič, S.; Starič, M.; Stoeck, H.; Sumisawa, K.; Suzuki, S.; Suzuki, S. Y.; Takasaki, F.; Tanaka, M.; Teramoto, Y.; Tian, X. C.; Trabelsi, K.; Tsukamoto, T.; Uehara, S.; Ueno, K.; Uno, S.; Urquijo, P.; Ushiroda, Y.; Usov, Y.; Varner, G.; Varvell, K. E.; Villa, S.; Wang, C. H.; Watanabe, Y.; Won, E.; Xie, Q. L.; Yabsley, B. D.; Yamaguchi, A.; Yamashita, Y.; Yamauchi, M.; Ying, J.; Zhang, C. C.; Zhang, L. M.; Zhang, Z. P.; Zhilich, V.; Zürcher, D.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 73, No. 9, 092003, 05.06.2006.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Measurement of CP violation in B0→D*-π+ and B0→D-π+ decays

AU - Ronga, F. J.

AU - Sarangi, T. R.

AU - Abe, K.

AU - Adachi, I.

AU - Aihara, H.

AU - Anipko, D.

AU - Arinstein, K.

AU - Asano, Y.

AU - Aushev, T.

AU - Bahinipati, S.

AU - Bakich, A. M.

AU - Balagura, V.

AU - Barberio, E.

AU - Barbero, M.

AU - Belous, K.

AU - Bitenc, U.

AU - Bizjak, I.

AU - Blyth, S.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Chang, P.

AU - Chen, A.

AU - Chen, W. T.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Choi, Y.

AU - Chuvikov, A.

AU - Dalseno, J.

AU - Danilov, M.

AU - Dash, M.

AU - Drutskoy, A.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Fratina, S.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Gershon, T.

AU - Gokhroo, G.

AU - Golob, B.

AU - Gorišek, A.

AU - Haba, J.

AU - Hara, K.

AU - Hara, T.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Hazumi, M.

AU - Higuchi, T.

AU - Hinz, L.

AU - Hokuue, T.

AU - Hoshi, Y.

AU - Hou, S.

AU - Hou, W. S.

AU - Iijima, T.

AU - Inami, K.

AU - Ishikawa, A.

AU - Ishino, H.

AU - Itoh, R.

AU - Iwasaki, Y.

AU - Kang, Ju Hwan

AU - Kawai, H.

AU - Kawasaki, T.

AU - Khan, H. R.

AU - Kim, H. J.

AU - Kinoshita, K.

AU - Korpar, S.

AU - Krokovny, P.

AU - Kulasiri, R.

AU - Kumar, R.

AU - Kuo, C. C.

AU - Kwon, Youngjoon

AU - Leder, G.

AU - Lee, J.

AU - Lesiak, T.

AU - Li, J.

AU - Limosani, A.

AU - Liventsev, D.

AU - Majumder, G.

AU - Mandl, F.

AU - Matsumoto, T.

AU - Mitaroff, W.

AU - Miyabayashi, K.

AU - Miyake, H.

AU - Miyata, H.

AU - Mohapatra, D.

AU - Nagamine, T.

AU - Nakamura, I.

AU - Nakano, E.

AU - Natkaniec, Z.

AU - Nishida, S.

AU - Nitoh, O.

AU - Noguchi, S.

AU - Nozaki, T.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Onuki, Y.

AU - Pakhlov, P.

AU - Park, C. W.

AU - Park, H.

AU - Peak, L. S.

AU - Pestotnik, R.

AU - Piilonen, L. E.

AU - Poluektov, A.

AU - Rozanska, M.

AU - Sakai, Y.

AU - Sato, N.

AU - Satoyama, N.

AU - Sayeed, K.

AU - Schietinger, T.

AU - Schneider, O.

AU - Schwartz, A. J.

AU - Seidl, R.

AU - Senyo, K.

AU - Sevior, M. E.

AU - Shapkin, M.

AU - Shibuya, H.

AU - Shwartz, B.

AU - Singh, J. B.

AU - Sokolov, A.

AU - Somov, A.

AU - Soni, N.

AU - Stamen, R.

AU - Stanič, S.

AU - Starič, M.

AU - Stoeck, H.

AU - Sumisawa, K.

AU - Suzuki, S.

AU - Suzuki, S. Y.

AU - Takasaki, F.

AU - Tanaka, M.

AU - Teramoto, Y.

AU - Tian, X. C.

AU - Trabelsi, K.

AU - Tsukamoto, T.

AU - Uehara, S.

AU - Ueno, K.

AU - Uno, S.

AU - Urquijo, P.

AU - Ushiroda, Y.

AU - Usov, Y.

AU - Varner, G.

AU - Varvell, K. E.

AU - Villa, S.

AU - Wang, C. H.

AU - Watanabe, Y.

AU - Won, E.

AU - Xie, Q. L.

AU - Yabsley, B. D.

AU - Yamaguchi, A.

AU - Yamashita, Y.

AU - Yamauchi, M.

AU - Ying, J.

AU - Zhang, C. C.

AU - Zhang, L. M.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zürcher, D.

PY - 2006/6/5

Y1 - 2006/6/5

N2 - We report measurements of time-dependent decay rates for B0→D(*)-π+ decays and extraction of CP violation parameters that depend on 3. Using fully reconstructed D(*)π events and partially reconstructed D*π events from a data sample that contains 386×106 BB̄ pairs that was collected near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric energy e+e- collider, we obtain the CP violation parameters S+(D(*)π) and S-(D(*)π). We obtain S+(D*π)=0.049±0.020(stat)±0.011(sys), S-(D*π)=0.031±0.019(stat)±0.011(sys), and S+(Dπ)=0.031±0.030(stat)±0.012(sys), S-(Dπ)=0.068±0. 029(stat)±0.012(sys). These results are an indication of CP violation in B0→D*-π+ and B0→D-π+ decays at the 2.5σ and 2.2σ levels, respectively. If we use the values of RD(*)π that are derived using assumptions of factorization and SU(3) symmetry, branching fraction measurements for the B→Ds(*)π modes, and lattice QCD calculations, we can restrict the allowed region of |sin (2 1+ 3)| to be above 0.44 and 0.52 at 68% confidence level from the D*π and Dπ modes, respectively.

AB - We report measurements of time-dependent decay rates for B0→D(*)-π+ decays and extraction of CP violation parameters that depend on 3. Using fully reconstructed D(*)π events and partially reconstructed D*π events from a data sample that contains 386×106 BB̄ pairs that was collected near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric energy e+e- collider, we obtain the CP violation parameters S+(D(*)π) and S-(D(*)π). We obtain S+(D*π)=0.049±0.020(stat)±0.011(sys), S-(D*π)=0.031±0.019(stat)±0.011(sys), and S+(Dπ)=0.031±0.030(stat)±0.012(sys), S-(Dπ)=0.068±0. 029(stat)±0.012(sys). These results are an indication of CP violation in B0→D*-π+ and B0→D-π+ decays at the 2.5σ and 2.2σ levels, respectively. If we use the values of RD(*)π that are derived using assumptions of factorization and SU(3) symmetry, branching fraction measurements for the B→Ds(*)π modes, and lattice QCD calculations, we can restrict the allowed region of |sin (2 1+ 3)| to be above 0.44 and 0.52 at 68% confidence level from the D*π and Dπ modes, respectively.

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U2 - 10.1103/PhysRevD.73.092003

DO - 10.1103/PhysRevD.73.092003

M3 - Article

VL - 73

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 9

M1 - 092003

ER -