7,126 research outputs found
Fragmentation-fraction ratio in - and -baryon decays
We study the ratio of fragmentation fractions, ,
from the measurement of and with . With the
branching fraction obtained
under the U-spin symmetry, the fragmentation ratio is determined as
=. To reduce the above uncertainties,
we suggest to measure the branching fractions of and at BESIII, Belle(II) and LHCb.Comment: 13 pages, 1 table, 1 figure. Version published in EPJ
Characteristic length of a Holographic Superconductor with -wave gap
After the discovery of the -wave and -wave holographic superconductors,
holographic models of -wave superconductor have also been constructed
recently. We study analytically the perturbation of the dual gravity theory to
calculate the superconducting coherence length of the -wave
holographic superconductor near the superconducting phase transition point. The
superconducting coherence length divergents as near
the critical temperature . We also obtain the magnetic penetration depth
by adding a small external homogeneous magnetic
field. The results agree with the -wave and -wave models, which are also
the same as the Ginzburg-Landau theory.Comment: last version, 10 pages, accepted by PR
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