Extraction of from two-body hadronic B decays

Kitazawa, Noriaki (Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan) ; Masukawa, Kyo-suke (Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan) ; Sakai, Yuki (Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan)

02 February 2019

Abstract: We propose a method of extracting the Cabibbo–Kobayashi–Maskawa matrix element from two-body hadronic decay processes of with precisely determined form factors of meson semi-leptonic decays. The amplitude which does not include the effect of hadronic final state interactions can be theoretically evaluated by using factorization and form factors of semi-leptonic B decays. We can obtain all the amplitudes in an isospin relation , including the effect of hadronic final state interactions as well as , using the experimental data of branching fractions of these three processes with a truncation of the states which contribute to the hadronic final state interactions. The extracted value of is . The decay processes of and can also be used in the same way, and the extracted values of are and , respectively. This method becomes possible by virtue of recent precise determinations of the form factors of semi-leptonic B decays. The uncertainties of by this method are expected to be reduced by the results of future B-factory experiments and lattice calculations.


Published in: PTEP 2019 (2019) 013B02
Published by: Oxford University Press/Physical Society of Japan
DOI: 10.1093/ptep/pty142
arXiv: 1802.05417
License: CC-BY-3.0



Back to search

Fulltext:
Download fulltextXML Download fulltextPDF Download fulltextPDF (PDFA)