3,584 research outputs found
Charged charmoniumlike structures in the process based on the ISPE mechanism
In 2017, the BESIII Collaboration announced the observation of a charged
charmonium-like structure in the invariant mass spectrum of
the process at different energy points,
which enables us to perform a precise study of this process based on the
initial single pion emission (ISPE) mechanism. In this work, we perform a
combined fit to the experimental data of the cross section of , and the corresponding and dipion
invariant mass spectra. Our result shows that the observed charged
charmonium-like structure in can be well
reproduced based on the ISPE mechanism, and that the corresponding dipion
invariant mass spectrum and cross section can be depicted with the same
parameters. In fact, it provides strong evidence that the ISPE mechanism can be
an underlying mechanism resulting in such novel a phenomenon.Comment: 11 pages, 8 figures and 4 table
Anomalous gauge couplings of the Higgs boson at the CERN LHC: Semileptonic mode in WW scatterings
We make a full tree level study of the signatures of anomalous gauge
couplings of the Higgs boson at the CERN LHC via the semileptonic decay mode in
WW scatterings. Both signals and backgrounds are studied at the hadron level
for the Higgs mass in the range 115 GeV to 200 GeV. We carefully impose
suitable kinematical cuts for suppressing the backgrounds. To the same
sensitivity as in the pure leptonic mode, our result shows that the
semileptonic mode can reduce the required integrated luminosity by a factor of
3. If the anomalous couplings in nature are actually larger than the
sensitivity bounds shown in the text, the experiment can start the test for an
integrated luminosity of 50 inverse fb.Comment: PACS numbers updated. Version published in Phys.Rev.D79,055010(2009
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