36 research outputs found
Linear programming analysis of the -parity violation within EDM-constraints
The constraint on the -parity violating supersymmetric interactions is
discussed in the light of current experimental data of the electric dipole
moment of neutron, Xe , Tl, and Hg atoms, and YbF and
ThO molecules. To investigate the constraints without relying upon the
assumption of the dominance of a particular combination of couplings over all
the rest, an extensive use is made of the linear programming method in the scan
of the parameter space. We give maximally possible values for the EDMs of the
proton, deuteron, He nucleus, Rn, Ra, Fr, and the
-correlation of the neutron beta decay within the constraints from the
current experimental data of the EDMs of neutron, Xe, Tl, and
Hg atoms, and YbF and ThO molecules using the linear programming
method. It is found that the -correlation of the neutron beta decay and
hadronic EDMs are very useful observables to constrain definite regions of the
parameter space of the -parity violating supersymmetry.Comment: 24 pages, 6 figure
Constraint on R-parity violating MSSM at the one-loop level from CP-odd N-N interaction
Minimal supersymmetric standard model with R-parity violation (RPVMSSM)
contributes to the P-, CP-odd four-quark interaction. The P-, CP-odd four-quark
interaction is constrained by the new 199Hg EDM experimental data. It is then
possible to constrain R-parity violating (RPV) couplings from the 199Hg EDM
data. In this talk, we analyze the RPV contribution to the P-, CP-odd four-
quark interaction at the one-loop level to give constraints on RPV parameters.Comment: To appear in the proceedings of International conference on the
structure of baryons: BARYONS'10, Osaka, Japan, 7-11 Dec 201
R-parity violating supersymmetric contributions to the neutron beta decay at the one-loop level
The contribution of the R-parity violating minimal supersymmetric standard
model to the neutron beta decay at the one-loop level is investigated. It is
found that the baryon number and R-parity violating interactions contribute to
the D correlation through one-loop corrections, while the tree level prediction
is vanishing. The Fierz interference term is also investigated at the one-loop
level by considering the lepton number and R-parity violating interactions. We
show that future experimental progress can provide us with better constraints
on some of the combinations of R-parity violating couplings.Comment: 13 pages, 6 figures, minor correction
R-parity violating supersymmetric contributions to the neutron beta decay
We investigate the contribution to the angular correlation coefficients of
the neutron beta decay within the R-parity violating (RPV) minimal
supersymmetric standard model (MSSM). The RPV effects contribute to the scalar
interaction at the tree level. The effective scalar interaction of the neutron
beta decay is constructed by making use of the relation between isospin
asymmetries and the proton-neutron mass difference. On the basis of the recent
update of the analyses of the superallowed Fermi transitions and the recent
measurement of transverse polarization of the emitted electrons at PSI, we
deduce new upper limits on the RPV couplings. We also point out the existence
of new types of angular correlations which are sensitive to the RPV
interactions.Comment: 11 pages, 2 figures, minor errors corrected, references adde
MYC-type transcription factors, MYC67 and MYC70, interact with ICE1 and negatively regulate cold tolerance in Arabidopsis
The expression of hundreds of genes is induced by low temperatures via a cold signaling pathway. ICE1, a MYC-type transcription factor, plays an important role in the induction of CBF3/DREB1A to control cold-responsive genes and cold tolerance. To elucidate other molecular factors, a yeast 2-hybrid screening was performed. Two MYC-type transcription factors, MYC67 and MYC70, were identified as ICE1-interacting proteins. The myc mutants were more tolerant to freezing temperatures than wild type. CBF3/DREB1A and other cold-responsive genes were up-regulated in the myc mutants. Overexpression of the MYC genes increased the cold sensitivity and down-regulated the expression of cold-responsive genes. The MYC proteins interacted with the cis-elements in the CBF3/DREB1A promoter, probably to interfere interaction between ICE1 and the cis-elements. Taken together, these results demonstrate that MYC67 and MYC70, ICE1 interactors, negatively regulate cold-responsive genes and cold tolerance
Action selection based on multiple-stimulus aspects in wind-elicited escape behavior of crickets
Escape behavior is essential for animals to avoid attacks by predators. In some species, multiple escape responses could be employed. However, it remains unknown what aspects of threat stimuli affect the choice of an escape response. We focused on two distinct escape responses (running and jumping) to short airflow in crickets and examined the effects of multiple stimulus aspects including the angle, velocity, and duration on the choice between these responses. The faster and longer the airflow, the more frequently the crickets jumped. This meant that the choice of an escape response depends on both the velocity and duration of the stimulus and suggests that the neural basis for choosing an escape response includes the integration process of multiple stimulus parameters. In addition, the moving speed and distance changed depending on the stimulus velocity and duration for running but not for jumping. Running away would be more adaptive escape behavior