3,259 research outputs found
A KINETIC COMPARISON OF THE INSIDE SOCCER KICK BETWEEN HIGH PERFORMANCE PLAYER AND JUNIOR PLAYERS
Kinetic aspect of the inside soccer kick was investigated and comparison was made between those of a high performance player and junior players. One high performance player and five junior players volunteered to participate in this study. Their kicking motions were analyzed through three-dimensional cinematograpgic technique. Joints torques, generated at hip and knee joints, were computed by a three-link kinetic chain composed of thigh, shank, and foot. A marked difference was observed for the hip external rotation torque. All the junior players exhibited hip external rotation torque, and its magnitude was particularly dominant in the latter part of leg swing. Conversely, the magnitude of hip external rotation torque for the professional player was negligible. These results may help to explain differences in kicking techniques between the two levels of players
Contribution of Majoron to Hubble tension in gauged U(1) Model
In this paper, we analyze parameter regions that can alleviate the Hubble
tension in the U(1) model with the broken lepton number
U(1) symmetry. As new particles, this model has a U(1)
gauge boson and a Majoron , which can affect the early universe and
the effective number of neutrino species . If and
simultaneously exist in the early universe, - interaction
processes such as occur. The
comparison of between the cases with and without the
- interaction processes shows that these processes make a small
contribution of to , and it does not need
to be considered for the alleviation of the Hubble tension. Based on these
facts, we calculated for various Majoron parameters without the
- interaction processes to search parameters that could alleviate
the Hubble tension. As a result, we found that the U(1)
gauge boson and Majoron can alleviate the Hubble tension in some parameter
regions, and there is a non-trivial synergy contribution between and
. Moreover, the parameter region with a lighter mass
MeV and a larger coupling is excluded because it
predicts too large , i.e. . The favored
and restricted regions of the Majoron parameters depend on the parameters
because of the presence of the contribution and synergy one.Comment: 24 pages, 4 figure
Asymmetric Mediator in Scotogenic Model
The scotogenic model is the Standard Model (SM) with Z_2 symmetry and the
addition of Z_2 odd right-handed Majorana neutrinos and SU(2)_L doublet scalar
fields. We have extended the original scotogenic model by an additional Z_2 odd
singlet scalar field that plays a role in dark matter. In our model, the
asymmetries of the lepton and Z_2 odd doublet scalar are simultaneously
produced through CP-violating right-handed neutrino decays. While the former is
converted into baryon asymmetry through the sphaleron process, the latter is
relaid to the DM density through the decay of SU(2)_L doublet scalar that is
named "asymmetric mediator". In this way, we provide an extended scotogenic
model that predicts the energy densities of baryon and dark matter being in the
same order of magnitude, and also explains the low-energy neutrino masses and
mixing angles.Comment: 17 pages, 1 table, 5 figure
Model Building by Coset Space Dimensional Reduction Scheme Using Twelve-Dimensional Coset Spaces
We investigate the twelve-dimensional gauge-Higgs unification models with an
eight-dimensional coset space. For each model, we apply the coset space
dimensional reduction procedure and examine the particle contents of the
resulting four-dimensional theory. Then, some twelve-dimensional SO(18) gauge
theories lead to models of the SO(10)\times U(1) grand unified theory in four
dimensions, where fermions of the Standard Model appear in multiple generations
along with scalars that may break the electroweak symmetry. The representations
of the obtained scalars and fermions are summarized.Comment: 17 pages, 4 table
Novel mechanism of photoinduced reversible phase transitions in molecule-based magnets
A novel microscopic mechanism of bi-directional structural changes is
proposed for the photo-induced magnetic phase transition in Co-Fe Prussian blue
analogues on the basis of ab initio quantum chemical cluster calculations. It
is shown that the local potential energies of various spin states of Co are
sensitive to the number of nearest neighbor Fe vacancies. As a result, the
forward and backward structural changes are most readily initiated by
excitation of different local regions by different photons. This mechanism
suggests an effective strategy to realize photoinduced reversible phase
transitions in a general system consisting of two local components.Comment: 4 pages, LaTex, 3 figures, to appear in Phys. Rev. Let
A new inelastic neutron spectrometer HODACA
A new multiplex-type inelastic neutron scattering spectrometer, HOrizontally
Defocusing Analyzer Concurrent data Acquisition spectrometer (HODACA), was
recently developed and built at the C1-1 cold neutron beam port in JRR-3. The
spectrometer is suitable for dynamics measurements in the energy range of
meV 7 meV, catering to a broad array of
research fields in physics and material science. HODACA combines 24 detectors
and 132 pieces of analyzer crystals and has an estimated measurement efficiency
that is 70 times greater than the existing conventional triple-axis
spectrometer at the C1-1 beam port. The concept, design, specification, and
results of commissioning experiments are described.Comment: 11 pages, 16 figure
An Alkaline Hot Spring in the Philippines
金沢大学大学院自然科学研究科National Institute of Geological Sciences, University of the Philippines-Diliman, PhiloppinePromoting Environmental Pesearch in Pan-Japan Sea Area : Young Researchers\u27 Network, Schedule: March 8-10,2006,Kanazawa Excel Hotel Tokyu, Japan, Organized by: Kanazawa University 21st-Century COE Program, Environmental Monitoring and Prediction of Long- & Short- Term Dynamics of Pan-Japan Sea Area ; IICRC(Ishikawa International Cooperation Research Centre), Sponsors : Japan Sea Research ; UNU-IAS(United Nations University Institute of Advanced Studies)+Ishikawa Prefecture Government ; City of Kanazaw
Gluino Decay as a Probe of High Scale Supersymmetry Breaking
A supersymmetric standard model with heavier scalar supersymmetric particles
has many attractive features. If the scalar mass scale is O(10 - 10^4) TeV, the
standard model like Higgs boson with mass around 125 GeV, which is strongly
favored by the LHC experiment, can be realized. However, in this scenario the
scalar particles are too heavy to be produced at the LHC. In addition, if the
scalar mass is much less than O(10^4) TeV, the lifetime of the gluino is too
short to be measured. Therefore, it is hard to probe the scalar particles at a
collider. However, a detailed study of the gluino decay reveals that two body
decay of the gluino carries important information on the scalar scale. In this
paper, we propose a test of this scenario by measuring the decay pattern of the
gluino at the LHC.Comment: 29 pages, 9 figures; version published in JHE
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