16,729 research outputs found
Recent Results on B Meson Oscillations
This paper presents recent time-dependent measurements of neutral B meson
oscillations. Similar to the -- system, there are two such
systems involving the b quark: -- and
--. Thus the physical states are respectively and
, and , and and . The oscillation
between each pair of states can be used to determine their mass difference. The
present world average for the -- mass difference is (or eV). Using
= 12\% (the fraction of produced in b events), the current
lower limit on the corresponding is 6.1 ps (or eV).Comment: Invited talk at the XVII International Symposium on Lepton-Photon
Interactions, Beijing, China, 1995. 26 pages, latex, 15 figure
Electrodynamics Modified by Some Dimension-five Lorentz Violating Interactions: Radiative Corrections
We study radiative corrections to massless quantum electrodynamics modified
by two dimension-five LV interactions and in
the framework of effective field theories. All divergent
one-particle-irreducible Feynman diagrams are calculated at one-loop order and
several related issues are discussed. It is found that massless quantum
electrodynamics modified by the interaction alone is one-loop renormalizable and the result can be
understood on the grounds of symmetry. In this context the one-loop
Lorentz-violating beta function is derived and the corresponding running
coefficients are obtained.Comment: 13 pages, 1 figure. Version to appear in EPJ
- …