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arXiv · 1203.0930

Search for Time-Dependent CPT Violation in Hadronic and Semileptonic B Decays

T. Higuchi·K. Sumisawa·I. Adachi·H. Aihara·D. M. Asner·V. Aulchenko·T. Aushev·A. M. Bakich·A. Bay·K. Belous·V. Bhardwaj·B. Bhuyan·M. Bischofberger·A. Bondar·A. Bozek·M. Bračko·O. Brovchenko·T. E. Browder·M. -C. Chang·P. Chang·A. Chen·P. Chen·B. G. Cheon·K. Chilikin·R. Chistov·I. -S. Cho·K. Cho·S. -K. Choi·Y. Choi·J. Dalseno·M. Danilov·Z. Doležal·Z. Drásal·S. Eidelman·D. Epifanov·J. E. Fast·V. Gaur·N. Gabyshev·A. Garmash·Y. M. Goh·B. Golob·J. Haba·K. Hara·K. Hayasaka·H. Hayashii·Y. Horii·Y. Hoshi·W. -S. Hou·Y. B. Hsiung·H. J. Hyun·T. Iijima·K. Inami·A. Ishikawa·R. Itoh·Y. Iwasaki·T. Iwashita·T. Julius·J. H. Kang·P. Kapusta·T. Kawasaki·C. Kiesling·H. J. Kim·H. O. Kim·J. B. Kim·K. T. Kim·M. J. Kim·Y. J. Kim·B. R. Ko·S. Koblitz·P. Kodyš·S. Korpar·P. Križan·P. Krokovny·T. Kuhr·T. Kumita·A. Kuzmin·Y. -J. Kwon·J. S. Lange·S. -H. Lee·J. Li·Y. Li·J. Libby·C. Liu·Z. Q. Liu·D. Liventsev·R. Louvot·D. Matvienko·S. McOnie·K. Miyabayashi·H. Miyata·Y. Miyazaki·G. B. Mohanty·A. Moll·T. Mori·N. Muramatsu·Y. Nagasaka·Y. Nakahama·M. Nakao·H. Nakazawa·Z. Natkaniec
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Abstract

We report a new sensitive search for CPT violation, which includes improved measurements of the CPT-violating parameter z and the total decay-width difference normalized to the averaged width DeltaGamma_d/Gamma_d of the two Bd mass eigenstates. The results are based on a data sample of 535 x 10^6 BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. We obtain Re(z) = [+1.9 +/- 3.7 (stat) +/- 3.3 (syst)] x 10^{-2}, Im(z) = [-5.7 +/- 3.3 (stat) +/- 3.3 (syst)] x 10^{-3}, and DeltaGamma_d/Gamma_d = [-1.7 +/- 1.8 (stat) +/- 1.1 (syst)] x 10^{-2}, all of which are consistent with zero. This is the most precise single measurement of these parameters in the neutral B-meson system to date.

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T. Higuchi, K. Sumisawa, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bay, K. Belous, V. Bhardwaj, B. Bhuyan, M. Bischofberger, A. Bondar, A. Bozek, M. Bračko, O. Brovchenko, T. E. Browder, M. -C. Chang, P. Chang, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. -S. Cho, K. Cho, S. -K. Choi, Y. Choi, J. Dalseno, M. Danilov, Z. Doležal, Z. Drásal, S. Eidelman, D. Epifanov, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, B. Golob, J. Haba, K. Hara, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. -S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, P. Kapusta, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. B. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, S. Koblitz, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, S. -H. Lee, J. Li, Y. Li, J. Libby, C. Liu, Z. Q. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, A. Moll, T. Mori, N. Muramatsu, Y. Nagasaka, Y. Nakahama, M. Nakao, H. Nakazawa, Z. Natkaniec. 2012-04-25. Search for Time-Dependent CPT Violation in Hadronic and Semileptonic B Decays. https://doi.org/10.1103/physrevd.85.071105

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