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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2012, vol. 85, p. -

Search for time-dependent CPT violation in hadronic and semileptonic B decays

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

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 ΔΓ d/ Γ d of the two B d mass eigenstates. The results are based on a data sample of 535×106 BB̄ pairs collected at the Υ(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)]×10 -2, Im(z)=[-5.7±3.3(stat)±3. 3(syst)]×10 -3, and ΔΓ d/Γ d=[-1.7±1.8(stat)±1.1(syst)]×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. © 2012 American Physical Society.