53,096 research outputs found
ZEUS Results
Several results from the ZEUS Collaboration were presented at this Workshop.
The highlights are presented in this summary, and include results from NLO QCD
fits and determination of alphas, from forward jets and diffractive final
states, from pentaquarks and searches and from heavy flavour production. Also
the first results from the analysis of the HERA II e+p/e-p data are shown.Comment: 12 pages, Proceedings of the DIS05 Workshop, Madison, 200
GRB 090323 and GRB 090328: two long high-energy GRBs detected with Fermi
We present the analysis of two long Gamma-Ray Bursts, GRB 090323 and GRB
090328, which triggered the Fermi Gamma-Ray Burst Monitor (GBM) and generated
an Autonomous Repoint Request to the Fermi Large Area Telescope. The GBM light
curves show multi-peaked structures for both events. Here, we present
time-integrated and time-resolved burst spectra fitted with different models by
the GBM detectors.Comment: 6 pages, 4 figures, 1 table, Proceedings for "The Shocking Universe -
Gamma-Ray Bursts and High Energy Shock phenomena", Venice (Italy), September
14-18, 200
Search for exotic charmonium states
One of the most intriguing puzzles in hadron spectroscopy are the numerous
charmonium-like states observed in the last decade, including charged states
that are manifestly exotic. The and Belle experiments have extensively
studied those in B meson decays, initial state radiation processes and two
photon reactions. We can question what we have understood after 11 year search
in this field, and try to combine results to conclude on what these new
unpredicted resonant states are, and how they can be accommodated in the
theory. Big effort has been made from theoretical and experimental point of
view, as the potential models unlikely explain the presence of so many
enhancements, for mass values above the threshold. In this report
the and Belle results of the two invariant mass systems of and are put in comparison in a search for
non-conventional charmonium states. This involves the study of the systems of
and , respectively. There are strong
theoretical arguments in favor of the presence of hybrids or exotic states, in
those invariant mass distributions. Remarks on these data analyses are given,
based on the and Belle experimental results.Comment: 8 pages, 21 figures, Proceedings of a plenary talk on behalf of the
BaBar and the Belle Collaborations, at the Conference HQL 2014. Submitted at
Pos - Proceedings of Science. arXiv admin note: substantial text overlap with
arXiv:1410.565
Exotics at Belle and perspectives at Belle II
The search for multi-quark states beyond the constituent quark model (CQM)
has resulted in the discovery of many new exotic states, starting with the
observation of the X(3872), discovered by Belle in 2003. Also in the sector of
charm-strange physics the CQM does not seem to describe properly all spectrum,
despite of theoretical expectations. These new forms of quark bounds clearly
show that mesons and baryons are not the only possibilities to be considered.
We shortly report in this paper selected recent results on searching for such
states at Belle, with the perspectives in the hadron physics program at the
Belle II experiment.Comment: 8 pages, 3 figures, proceedings written for the "Excited QCD Workshop
2018", Kopaonik (Serbia
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