Model-independent constraints on hadronic form factors with above-threshold poles
نویسندگان
چکیده
منابع مشابه
Electromagnetic Hadronic Form-Factors
The determination of light hadron physics properties is of considerable interest to experimental labs such as Jefferson Lab. Many quantities, such as hadron form-factors and generalized structure functions, are not well understood theoretically. The available and forthcoming high precision experimental data presents considerable challenges and many opportunities for corresponding lattice calcul...
متن کاملSemileptonic form factors – a model-independent approach
We demonstrate that the B → D(∗)lν form factors can be accurately predicted given the slope parameter ρ2 of the Isgur-Wise function. Only weak assumptions, consistent with lattice results, on the wavefunction for the light degrees of freedom are required to establish this result. We observe that the QCD and 1 mQ corrections can be systematically represented by an effective Isgur-Wise function o...
متن کاملBaryon form factors : Model – independent results ∗
Baryon form factors can be analyzed in a largely model–independent fashion in terms of two complementary approaches. These are chiral perturbation theory and dispersion relations. I review the status of dispersive calculations of the nucleon electromagnetic form factors in the light of new data. Then, I present the leading one–loop chiral perturbation theory analysis of the hyperon and the stra...
متن کاملHadronic Electromagnetic Form Factors and Color Transparency
We review the current status of electromagnetic form factor calculations in perturbative QCD. There is growing evidence that factorization prescriptions involving a transverse coordinate integration, such as that of Li and Sterman, are more appropriate than the prescription of LePage and Brodsky. Color transparency is naturally described within the formalism. We report the first explicit calcul...
متن کاملHadronic Form Factors and Perturbative Qcd
The electromagnetic form factors of hadrons at large momentum transfer have been the subject of intense theoretical and experimental scrutiny over the past two decades, yet there is still not a universally-accepted framework for their description. This review is a synopsis of their current status at large momentum transfer. The basic theoretical approaches to form factors at large momentum tran...
متن کاملذخیره 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: 2017
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.96.036015