216 research outputs found
Photoproduction of -wave doubly charmed baryon at future collider
The photoproduction of -wave doubly charmed baryon () is
investigated in the context of future high-energy and high-luminosity
colliders. The direct photoproduction via the sub-process and the resolved channel are considered. Within the framework of
non-relativistic QCD, the calculation encompasses four -wave -diquark
configurations: ,
, and
. The two -wave states,
and , are also
included for comparison. The cross sections, as well as the differential
distributions involving transverse momentum, rapidity, and angular variables,
have been computed. Numerical results reveal that the resolved photoproduction
process plays a significant role and can provide dominant contributions. The
photoproduction rate of the -wave is approximately one order of
magnitude lower than that of the -wave
Photoproduction of doubly heavy baryons at future colliders
The photoprodution of doubly heavy baryon () is
investigated in the context of future high-energy and high-luminosity
colliders. The study incorporates two sources of initial photons, namely the
LBS photon and the WWA photon. Alongside the direct photoproduction via the
sub-process
(), the resolved photoproduction channels are specifically
considered, encompassing the sub-processes , ,
and with .
Within the framework of non-relativistic QCD, two -diquark
configurations, and
, and four -diquark configurations,
, ,
and , are
considered in the calculations. Numerical results show that the single resolved
photoproduction processes provide dominant contributions under certain
collision configuration. At the future colliders, the doubly heavy
baryon generated via the photoproduction mechanism is promisingly observable
and can be well studied
The study of lepton EDM in CP violating BLMSSM
In the supersymmetric model with local gauged baryon and lepton
numbers(BLMSSM), the CP violating effects are considered to study the lepton
electric dipole moment(EDM). The CP violating phases in BLMSSM are more than
those in the standard model(SM) and can give large contributions. The analysis
of the EDMs for the leptons is shown in this work. It is in
favour of exploring the source of CP violation and probing the physics beyond
SM.Comment: 20 pages, 10figure
Higgs boson decays to meson in the fragmentation-function approach
In the paper, we present a calculation of the decay widths for the Higgs
boson decays to the , , and mesons
using the fragmentation-function approach. In the calculation, the
fragmentation functions up to order based on the nonrelativistic
QCD factorization theory are used, and the decay widths for and at the partonic level are calculated up to order . The large
logarithms of are resummed up to next-to-leading logarithmic
accuracy by solving the evolution equations for the running quark masses and
the fragmentation functions. Compared to the leading-order decay widths based
on the nonrelativistic QCD approach, the decay widths based on the
fragmentation-function approach that include the higher-order QCD corrections
are reduced significantly. Our numerical results show that there are about
events via the Higgs decays to be produced at the HL-LHC
with , and about events via the Higgs decays
to be produced at the HE-LHC with .Comment: 12 pages, 9 figure
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