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

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A. Bay K. Belous V. Bhardwaj B. Bhuyan M. Bischofberger A. Bondar A. Bozek M. Bra\v{c}ko 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. Dole\v{z}al Z. Dr\'asal 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. Kody\v{s} S. Korpar P. Kri\v{z}an 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 C. Ng S. Nishida K. Nishimura O. Nitoh T. Nozaki S. Ogawa T. Ohshima S. Okuno S. L. Olsen Y. Onuki P. Pakhlov G. Pakhlova C. W. Park H. K. Park K. S. Park R. Pestotnik M. Petri\v{c} L. E. Piilonen M. Prim M. Ritter M. R\"ohrken S. Ryu H. Sahoo Y. Sakai T. Sanuki Y. Sato O. Schneider C. Schwanda A. J. Schwartz R. Seidl K. Senyo M. E. Sevior M. Shapkin V. Shebalin C. P. Shen T.-A. Shibata J.-G. Shiu B. Shwartz A. Sibidanov R. Sinha P. Smerkol Y.-S. Sohn A. Sokolov E. Solovieva S. Stani\v{c} M. Stari\v{c} M. Sumihama T. Sumiyoshi S. Tanaka G. Tatishvili Y. Teramoto K. Trabelsi T. Tsuboyama M. Uchida S. Uehara T. Uglov Y. Unno S. Uno P. Urquijo Y. Usov G. Varner K. E. Varvell A. Vinokurova V. Vorobyev C. H. Wang P. Wang X. L. Wang M. Watanabe Y. Watanabe K. M. Williams E. Won B. D. Yabsley H. Yamamoto Y. Yamashita C. Z. Yuan Y. Yusa Z. P. Zhang V. Zhilich V. Zhulanov

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classification ✦ hep-ex

keywords statsystdeltagammagammasearchviolationasymmetric-energyaveraged

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

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