Based on the charge conjugation invariance and the vacuum property
of the Pomeron, we point out that the commonly used vector vertex
of the Pomeron coupling to quark is incorrect since it contradicts
with the Pomeron property. We also claim that the soft Pomeron
could be a tensor glueball ξ(2230) with quantum numbers
IGJPC = 0+2++ and total decay width
Γtot≃100 MeV, which lies on the soft Pomeron
trajectory αp = 1.08+0.20t. Therefore, the coupling
vertex of the soft Pomeron to quark should be tensorial which is
invariant under the charge conjugation and can explain why the
inadequate vector coupling, γμ, of the soft Pomeron to
quark is successful in dealing with Pomeron physics.
T-cell activation is initiated after T-cell receptor binding to antigen, but also requires interactions between costimulatory molecules expressed on antigen-presenting cells. An important costimulatory molecule expressed by monocytes and activated B lymphocytes has been recently identified and termed B7–2 or B70. Independently, a new Cluster of Differentiation was defined in the Fifth International Leukocyte Differentiation Antigen Workshop as CD86, a molecule predominantly expressed by monocytes and activated B lymphocytes. In this study, the two monoclonal antibodies that defined CD86, FUN-1 and BU-63, were shown to bind to cDNA transfected cells expressing B7– 2/B70. The FUN-1 monoclonal antibody also completely blocked the costimulatory activity of B7–2/B70 in functional assays. Therefore, the serologically defined CD86 differentiation antigen is the B7–2/B70 molecule.
The decays of the c͑2S͒ into vector plus tensor meson final states have been studied for the first time using the BES detector. We determine upper limits on branching fractions for c͑2S͒ decays into vf 2 , ra 2 , K 0ء K 0ء 2 1 c.c., and ff 0 2 ͑1525͒ that are, in each case, significantly smaller than the corresponding branching fractions for the J͞c meson, scaled according to the expectations of perturbative QCD.
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