1,670 research outputs found
Criticality in Gauged Supergravities
AdS black holes show richer transition behaviors in extended phase space by
assuming the cosmological constant and its conjugate quantity to behave like
thermodynamic pressure and thermodynamic volume. We study the extended
thermodynamics of charged dilatonic AdS black holes in a class of
Einstein-Maxwell-dilaton theories that can be embedded in gauged supergravities
in various dimensions. We find that the transition behaviors of higher
dimensional dilatonic AdS black holes are different from the four dimensional
counterparts, and new transition behaviors emerges in higher dimensions. First,
there exists standard Van der Waals transition only in a five dimensional
dilatonic AdS black hole with two equal charges. Second, there emerge a new
phase transition branch in negative pressure region in six and seven
dimensional dilatonic black holes with two equal charges. Third, there emerge
transition behaviors in higher dimensional black hole with single charge cases,
which are absent in four dimensions.Comment: Latex, 18 pages, 8 figures; published versio
Probing and Interaction at LHC
Many new physics models predict the existence of TeV-scale charged gauge
boson together with Higgs boson(s). We study the
interaction and explore the angular distribution of charged lepton to
distinguish from in process at the LHC. It is found that a new type forward-backward
asymmetry() relating to the angle between the direction of the charged
lepton in rest frame and that of the reconstructed in laboratory
frame is useful to investigate the properties of interaction. We
analyze the Standard Model backgrounds and develop a set of cuts to highlight
the signal and suppress the backgrounds at LHC. We find that can reach
0.03(-0.07) for () production at TeV
Investigating the NCQ scaling of elliptic flow at LHC with a multiphase transport model
The number of constituent quark (NCQ) scaling behavior of elliptic flow has
been systematically studied at the LHC energy within the framework of a
multiphase transport model (AMPT) in this work. We find that the parameters
used to generate the initial states and the collision centrality are important
for the existence of NCQ scaling even when hadronic rescattering contribution
is off in Pb-Pb collisions of TeV. By turning on the
hadron rescattering process, the hadronic evolution impacts are also found to
be significant. Extending the analysis to Pb-Pb collsions of
TeV, one would observe similar qualitative features
Study Majorana Neutrino Contribution to B-meson Semi-leptonic Rare Decays
B meson semi-leptonic rare decays are sensitive to new physics beyond
standard model. We study the process and
investigate the Majorana neutrino contribution to its decay width. The
constraints on the Majorana neutrino mass and mixing parameter are obtained
from this decay channel with the latest LHCb data. Utilizing the best fit for
the parameters, we study the lepton number violating decay , and find its branching ratio is about
, which is consistent with the LHCb data reported recently.Comment: 10 pages, 3 figure
Stability Analysis of Fractional Order Systems with Time Delay
In this paper, we mainly study the stability of linear and interval linear fractional systems with time delay.
By applying the characteristic equations, a necessary and sufficient stability condition is obtained firstly,
and then some sufficient conditions are deserved. In addition, according to the equivalent relationship of fractional order systems with order
and with order , one may get more relevant theorems. Finally, two examples are provided to demonstrate the effectiveness
of our results
Stability Analysis of Fractional Order Systems with Time Delay
In this paper, we mainly study the stability of linear and interval linear fractional systems with time delay.
By applying the characteristic equations, a necessary and sufficient stability condition is obtained firstly,
and then some sufficient conditions are deserved. In addition, according to the equivalent relationship of fractional order systems with order
and with order , one may get more relevant theorems. Finally, two examples are provided to demonstrate the effectiveness
of our results
Dichlorido{2-[(2,6-dimethylphenyl)iminomethyl]pyridine-κ2 N,N′}zinc
In the asymmetric unit of the title compound, [ZnCl2(C14H14N2)], the central ZnII ion is four-coordinated in a distorted tetrahedral environment by two N atoms of the ligand 2-[(2,6-dimethylphenyl)iminomethyl]pyridine and two chloride anions. In the crystal, adjacent molecules are connected through C—H⋯Cl hydrogen bonds between a C—H group of the ligand and a Cl− anion, leading to a chain-like structure along the b direction
6-Isopropyl-5-methoxy-3-phenyl-3H-1,2,3-triazolo[4,5-d]pyrimidin-7(6H)-one
In the title compound, C14H15N5O2, the whole molecule apart from the terminal C atoms of the isopropyl group is located on a crystallographic mirror plane. An intramolecular C—H⋯N hydrogen-bonding interaction may stabilize the molecular conformation. The crystal packing features weak slipped π–π interactions between the pyrimidine and the phenyl rings of symmetry-related molecules [centroid–centroid distance = 3.746 (1)Å, slippage of 1.574 Å]
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