Nonfactorizable effects in B to charmonium decays

نویسنده

  • Fulvia De Fazio
چکیده

Nonleptonic B to charmonium decays generally deviate from the factorization predictions. We study rescattering effects mediated by intermediate charmed mesons in this class of decay modes and, in particular, we consider B− → K−hc with hc the J PC = 1 c̄c meson, relating this mode to B− → K−χc0. We find B(B− → K−hc) large enough to be measured at the B factories, hence this process could be used to study the poorly known hc. PACS. 12.39.Hg – 12.39.St – 13.25.Hw

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Problems of QCD factorization in exclusive decays of B meson to charmonium

We study the exclusive decays of B meson into P-wave charmonium states χcJ(J = 0, 1) within QCD factorization approach and find that for B → χc1K decay, the factorization breaks down due to logarithmic divergences arising from nonfactorizable spectator interactions even at twist-2 order, and the decay rate is too small to accommodate the data, and that for B → χc0K decay, there are infrared div...

متن کامل

Nonfactorizable contributions to B meson decays into charmonia

We analyze the B → (J/ψ, χc0, χc1, ηc)K decays, which have small or even vanishing branching ratios in naive factorization assumption (FA). We calculate nonfactorizable corrections to FA in the perturbative QCD approach based on kT factorization theorem. The charmonium distribution amplitudes are inferred from the non-relativistic heavy quarkonium wave functions. It is found that the nonfactori...

متن کامل

Nonfactorizable contributions in B decays to charmonium : the case of B − →

Nonleptonic B to charmonium decays generally show deviations from the factorization predictions. For example, the mode B− → Kχc0 has been experimentally observed with sizeable branching fraction while its factorized amplitude vanishes. We investigate the role of rescattering effects mediated by intermediate charmed meson production in this class of decay modes, and consider B− → Khc with hc the...

متن کامل

Hadronic Weak Decays of Heavy Mesons and Nonfactorization

The parameters χ1,2, which measure nonfactorizable soft gluon contributions to hadronic weak decays of mesons, are updated by extracting them from the data of D, B → PP, V P decays (P : pseudoscalar meson, V : vector meson). It is found that χ2 ranges from −0.36 to −0.60 in the decays from D → K̄π to D+ → φπ+, D → K̄π, while it is of order 10% with a positive sign in B → ψK, Dπ, Dπ, Dρ decays. Th...

متن کامل

cK) decays in QCD factorization

We study the exclusive decays of B meson into pseudoscalar charmonium states ηc and η ′ c within the QCD factorization approach and find that the nonfactorizable corrections to naive factorization are infrared safe at leading-twist order. The spectator interactions arising from the kaon twist-3 effects are formally power-suppressed but chirally and logarithmically enhanced. The theoretical deca...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003