5,989 research outputs found
as a virtual state from interaction
In this work, we study the and invariant mass
spectra of the decay to find out the origin of the and
structures. The interaction is studied in
a coupled-channel quasipotential Bethe-Saltpeter equation approach, and
embedded to the decay process to reproduce both and
invariant mass spectra observed at BESIII simultaneously. It is
found out that a virtual state at energy about 3870 MeV is produced from the
interaction when both invariant mass spectra are comparable with the
experiment. The results support that both and have the
same origin, that is, a virtual state from
interaction, in which the interaction is more important and the
coupling between and channels plays a minor role.Comment: 8 pages, 4 figures, more reference adde
Interface dynamics under nonequilibrium conditions: from a self-propelled droplet to dynamic pattern evolution
In this article, we describe the instability of a contact line under
nonequilibrium conditions mainly based on the results of our recent studies.
Two experimental examples are presented: the self-propelled motion of a liquid
droplet and spontaneous dynamic pattern formation. For the self-propelled
motion of a droplet, we introduce an experiment in which a droplet of aniline
sitting on an aqueous layer moves spontaneously at an air-water interface. The
spontaneous symmetry breaking of Marangoni-driven spreading causes regular
motion. In a circular Petri dish, the droplet exhibits either beeline motion or
circular motion. On the other hand, we show the emergence of a dynamic
labyrinthine pattern caused by dewetting of a metastable thin film from the
air-water interface. The contact line between the organic phase and aqueous
phase forms a unique spatio-temporal pattern characterized as a dynamic
labyrinthine. Motion of the contact line is controlled by diffusion processes.
We propose a theoretical model to interpret essential aspects of the observed
dynamic behavior
Interpretation of as an isoscalar partner of from interaction
Invoked by the recent observation of at BESIII, which is about 40
MeV below the threshold, we investigate possible
bound and resonance states from the interaction with
the one-boson-exchange model in a quasipotential Bethe-Salpeter equation
approach. A bound state with quantum number is produced at 4384
MeV from the interaction, which can be related to
experimentally observed . Another state with quantum number
is also produced at MeV from this interaction.
Different from the state, the state is a resonance
state above the threshold. This resonance state can
be related to the first observed charged charmonium-like state , which
has a mass about 4475 MeV measured above the threshold as observed at Belle and
LHCb. Our result suggests that is an isoscalar partner of the
as a hadronic-molecular state from the
interaction.Comment: 5 pages, 1 figur
A novel explanation of charmonium-like structure in
We first present a non-resonant description to charmonium-like structure
in the invariant mass spectrum of the process. The structure is depicted well by the
interference effect of the production amplitudes of via the intermediate charmonia and direct
annihilation into . This fact shows that
is not a genuine resonance, which naturally explains why
was only reported in its hidden-charm decay channel and
was not observed in the exclusive open-charm decay channel or -value scan.Comment: 4 pages, 1 table, 2 figures. Accepted for publication in Phys. Rev.
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