3,842 research outputs found
Charged bottomonium-like structures in the hidden-bottom dipion decays of
Under the Initial Single Pion Emission mechanism, we study the hidden-bottom
dipion decays of , i.e., and
. We predict explicit sharp peak structures close to the
and thresholds and their reflections in the ,
and invariant mass spectrum distributions.
We suggest future experiment, i.e., Belle, BaBar, and forthcoming BelleII or
Super-B, carry out the search for these novel phenomena, which can provide
important test to the Initial Single Emission mechanism existing in higher
bottomonia.Comment: 5 pages, 4 figures, 1 table, More discussions added. Accepted by
Phys. Rev.
Interference effect as resonance killer of newly observed charmoniumlike states and
In this letter, we decode the newly observed charmoniumlike states,
and , by introducing interference effect between and
, which plays a role of resonance killer for and
. It means that two newly reported charmoniumlike states are not
genuine resonances, according to which we can naturally explain why two
well-established charmonia and are missing in the
cross sections of and
simultaneously. To well describe the detailed data of these cross sections
around GeV, our study further illustrates that a charmoniumlike
structure must be introduced. As a charmonium, should
dominantly decay into its open-charm channel ,
which provides an extra support to assignment to . In fact,
this interference effect introduced to explain and gives a
typical example of non-resonant explanations to the observed states,
which should be paid more attention especially before identifying the observed
states as genuine resonances.Comment: 5 pages, 4 figure
Charged charmonium-like structures and the initial single chiral particle emission mechanism
This paper summarizes what we have done so far to explain charged
charmonium/bottomonium-like structures using a hadronic triangle diagram which
we call the initial single chiral particle emission mechanism. We discuss
processes like in which two chiral particles and are
emitted from . In the intermediate we consider a hadronic one-loop diagram
in which are included to explain some
enhancements experimentally observed. Using this mechanism we explain some of
the exotic enhancements and predict a couple of enhancement structures.Comment: 4 pages, 1 table, conference paper of XIth Quark Connfinement and the
Hadron Spectrum held at St. Petersburg, Russia on Sept. 8-1
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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