Γ, and Weak Annihilation Typeset Using Revt E X
نویسنده
چکیده
A class of decay modes sensitive to only one quark topology at leading GF order (annihilation of valence quarks through a W ) is described. No experimental observations, nor even upper limits, have been reported for these decays. This work presents a simpleminded (order-of-magnitude) first calculation of their branching fractions. Although rare, one of these modes (D+ s → ρ+γ) might already be observable at charm experiments, while another (D+ → K∗+γ) should appear at the B factories, and the rest at hadron colliders. 13.25.Ft, 13.40.Hq, 13.25.Jx Typeset using REVTEX
منابع مشابه
Generation of Even and Odd Nonlinear Coherent States Typeset Using Revt E X
We show that a class of even and odd nonlinear coherent states, defined as the eigenstates of product of a nonlinear function of the number operator and the square of the boson annihilation operator, can be generated in the center-of-mass motion of a trapped and bichromatically laser-driven ion. The nonclasscial properties of the states are studied.
متن کاملNeutrino decoupling in the early Universe.
A calculation of neutrino decoupling in the early Universe, including full Fermi-Dirac statistics and electron mass dependence in the weak reaction rates, is presented. We nd that after decoupling, the electron neutrinos contribute 0.83% more to the relativistic energy density than in the standard scenario, where neutrinos are assumed not to share the heating from e annihilation. The correspond...
متن کاملTypeset Using Revt E X
The decay ω(782) → 5π in chiral theory. Abstract The arguments are put forward that the many pion decays ω → 2π + 2π − π 0 and π + π − 3π 0 provide an ideal test site for testing the predictions of chiral models of the vector meson decays into many pions. Using the approach based on the Weinberg Lagrangian or, in a new language, the Lagrangian of hidden local symmetry added with the term induce...
متن کاملInflationary Baryogenesis Typeset Using Revt E X 2
In this letter we explore the possibility of creating the baryon asymmetry of the universe during inflation and reheating due to the decay of a field associated with the inflaton. CP violation is attained by assuming that this field is complex with a phase that varies as the inflaton evolves. We consider chaotic and natural inflation scenarios. In the former case, the complex decaying field is ...
متن کاملProduction of Pseudoscalar Higgs-bosons in E Γ Collisions Typeset Using Revt E X 1
We investigate the production of a pseudoscalar Higgs-boson A0 using the reaction e γ → eA0 at an eē collider with center of mass energy of 500 GeV. Supersymmetric contributions are included and provide a substantial enhancement to the cross section for most values of the symmetry breaking parameters. We find that, despite the penalty incurred in converting one of the beams into a source of bac...
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 1999