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. BozekM. 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, Hirokazu Ishino, R. Itoh, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y. J. 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
Volume73
Issue number9
DOIs
Publication statusPublished - 2006
Externally publishedYes

Fingerprint

CP Violation
CP violation
Decay
decay
Lattice QCD
Confidence Level
Decay Rate
factorization
decay rates
Branching
confidence
Factorization
indication
quantum chromodynamics
Detector
Symmetry
detectors
symmetry
Energy
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

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, 73(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, Hirokazu; Itoh, R.; Iwasaki, Y.; Kang, J. H.; Kawai, H.; Kawasaki, T.; Khan, H. R.; Kim, H. J.; Kinoshita, K.; Korpar, S.; Krokovny, P.; Kulasiri, R.; Kumar, R.; Kuo, C. C.; Kwon, Y. J.; 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, Vol. 73, No. 9, 092003, 2006.

Research output: Contribution to journalArticle

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, YJ, 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, vol. 73, no. 9, 092003. https://doi.org/10.1103/PhysRevD.73.092003
Ronga FJ, Sarangi TR, Abe K, Adachi I, Aihara H, Anipko D et al. Measurement of CP violation in B0→D*-π+ and B0→D-π+ decays. Physical Review D. 2006;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, Hirokazu ; Itoh, R. ; Iwasaki, Y. ; Kang, J. H. ; Kawai, H. ; Kawasaki, T. ; Khan, H. R. ; Kim, H. J. ; Kinoshita, K. ; Korpar, S. ; Krokovny, P. ; Kulasiri, R. ; Kumar, R. ; Kuo, C. C. ; Kwon, Y. J. ; 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. 2006 ; Vol. 73, No. 9.
@article{ac4160b86f514c79a4e3a9a59cb78d50,
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 Hirokazu Ishino and R. Itoh and Y. Iwasaki and Kang, {J. H.} 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 Kwon, {Y. J.} 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",
year = "2006",
doi = "10.1103/PhysRevD.73.092003",
language = "English",
volume = "73",
journal = "Physical review D: Particles and fields",
issn = "0556-2821",
publisher = "American Physical Society",
number = "9",

}

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, Hirokazu

AU - Itoh, R.

AU - Iwasaki, Y.

AU - Kang, J. H.

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, Y. J.

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

Y1 - 2006

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.

UR - http://www.scopus.com/inward/record.url?scp=33744483506&partnerID=8YFLogxK

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U2 - 10.1103/PhysRevD.73.092003

DO - 10.1103/PhysRevD.73.092003

M3 - Article

AN - SCOPUS:33744483506

VL - 73

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 9

M1 - 092003

ER -