Radiative decays in charmonium beyond the p/m approximation

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

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

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Radiative Transitions in Charmonium

The form factors for the radiative transitions between charmonium mesons are investigated. We employ an anisotropic lattice using a Wilson gauge action, and domain-wall fermion action. We extrapolate the form factors to Q2 = 0, corresponding to a real photon, using quark-model-inspired functions. Finally, comparison is made with photocouplings extracted from the measured radiative widths, where...

متن کامل

Beyond “naive” factorization in exclusive radiative B–meson decays

We apply the QCD factorization approach to exclusive, radiative B meson decays in the region of small invariant photon mass. We calculate factorizable and nonfactorizable corrections to leading order in the heavy quark mass expansion and nextto-leading order in the strong coupling constant. Phenomenological consequences for the B → K∗γ decay rate and the B → K∗`+`− forward-backward asymmetry ar...

متن کامل

Probing photon helicity in radiative B decays via charmonium resonance interference

We investigate a new method to probe the helicity of the photon emitted in the b → sγ transition. The method relies on the observation of interference effects between two resonance contributions, B → K(Kγ)γ and B → ηc(γγ)K or B → χc0(γγ)K to the same final state Kγγ. Decays of the type B → Kres(Kγ)γ dominate the B → Kγγ yield throughout most of the phase space, and may be accessible at current ...

متن کامل

Nonfactorizable effects in B to charmonium decays

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 ...

متن کامل

Prompt Charmonium Production in Z Decays

The color-evaporation model quantitatively describes all data on photoproduction and hadroproduction of charmonium. Although the model is in part nonperturbative, the associated parameters can for instance be determined from the charmonium photoproduction data. At this point its predictions for the prompt production of ψ’s at the Z pole are made with no free parameters. We show here that this a...

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

ژورنال

عنوان ژورنال: Physical Review D

سال: 2020

ISSN: 2470-0010,2470-0029

DOI: 10.1103/physrevd.101.014027