Intrinsic Charm of Vector Mesons : A Possible Solution of the “ pr Puzzle ” * Stanley
نویسندگان
چکیده
An outstanding mystery of charmonium physics is why the J/q decays prominently to pseudoscalar plus vector meson channels, such as J/ll, -+ pr and J/G + K*K, whereas the @‘(as) d oes not. We show that such decays of J/$ and their suppression for $+(2S) f 11 o ow naturally from the existence of intrinsic charm 1 ijq EC) Fock components of the light vector mesons. Submitted to Physical Review Letters.
منابع مشابه
B decays into two light pseudoscalar mesons and possible effects of enhanced b → sg
We consider the branching ratios and CP asymmetry in the B meson decays into two pseudoscalar mesons in the generalized factorization approximation. We also investigate the possible effects of the enhanced chromomagnetic interaction b → sg on these exclusive B meson decays that was suggested as a possible solution to the semileptonic branching ratio of B mesons, the missing charm puzzle and the...
متن کاملHeavy quark mass expansion and intrinsic charm in light hadrons
We review the technique of heavy quark mass expansion of various operators made of heavy quark fields using a semiclassical approximation. It corresponds to an operator product expansion in the form of series in the inverse heavy quark mass. This technique applied recently to the axial current is used to estimate the charm content of the η, η′ mesons and the intrinsic charm contribution to the ...
متن کاملNon-factorizable contributions in hadronic weak decays of charm mesons
Two body decays of charm mesons are studied by describing their amplitude in terms of a sum of factorizable and non-factorizable ones. The former is estimated by using a naive factorization while the latter is calculated by using a hard pseudo-scalar-meson approximation. The hard pseudo-scalar-meson amplitude is given by a sum of the so-called equal-time commutator term and surface term which c...
متن کاملIntrinsic charm of light mesons and CP violation in heavy quark decay
We investigate the impact of the intrinsic heavy quark states on the predicted values of CP asymmetries in the decays of heavy mesons. It is shown that the intrinsic charm contribution, although dynamically suppressed in QCD, is favored by the weak interaction, and therefore it can significantly dilute the predicted values of CP-violating asymmetries. This introduces additional non-perturbative...
متن کاملQCD and Intrinsic Heavy Quark Predictions for Leading Charm and Beauty Hadroproduction
Recent experiments at Fermilab and CERN have observed a strong asymmetry between the hadroproduction cross sections of leading D mesons, containing projectile valence quarks, and nonleading charmed mesons, without projectile valence quarks. The observed correlations of the πN → DX cross section with the projectile charge violates the usual assumption that heavy quark jet fragmentation factorize...
متن کاملذخیره 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 1997