3,371 research outputs found
Heavy-Baryon Spectroscopy from Lattice QCD
We use a four-dimensional lattice calculation of the full-QCD (quantum
chromodynamics, the non-abliean gauge theory of the strong interactions of
quarks and gluons) path integrals needed to determine the masses of the charmed
and bottom baryons. In the charm sector, our results are in good agreement with
experiment within our systematics, except for the spin-1/2 , for
which we found the isospin-averaged mass to be to be
MeV. We predict the mass of the (isospin-averaged)
spin-1/2 to be {MeV}. In the bottom
sector, our results are also in agreement with experimental observations and
other lattice calculations within our statistical and systematic errors. In
particular, we find the mass of the to be consistent with the recent
CDF measurement. We also predict the mass for the as yet unobserved
to be 5955(27) MeV.Comment: Invited talk at Conference of Computational Physics 2009. 3 page
Conference Summary of QNP2018
This report is the summary of the Eighth International Conference on Quarks
and Nuclear Physics (QNP2018). Hadron and nuclear physics is the field to
investigate high-density quantum many-body systems bound by strong
interactions. It is intended to clarify matter generation of universe and
properties of quark-hadron many-body systems. The QNP is an international
conference which covers a wide range of hadron and nuclear physics, including
quark and gluon structure of hadrons, hadron spectroscopy, hadron interactions
and nuclear structure, hot and cold dense matter, and experimental facilities.
First, I introduce the current status of the hadron and nuclear physics field
related to this conference. Next, the organization of the conference is
explained, and a brief overview of major recent developments is discussed by
selecting topics from discussions at the plenary sessions. They include
rapidly-developing field of gravitational waves and nuclear physics, hadron
interactions and nuclear structure with strangeness, lattice QCD, hadron
spectroscopy, nucleon structure, heavy-ion physics, hadrons in nuclear medium,
and experimental facilities of EIC, GSI-FAIR, JLab, J-PARC, Super-KEKB, and
others. Nuclear physics is at a fortunate time to push various projects at
these facilities. However, we should note that the projects need to be
developed together with related studies in other fields such as gravitational
physics, astrophysics, condensed-matter physics, particle physics, and
fundamental quantum physics.Comment: 10 pages, LaTeX, 1 style file, 3 figure files, Proceedings of Eighth
International Conference on Quarks and Nuclear Physics (QNP2018), November
13-17, 2018, Tsukuba, Japa
Theoretical Summary of the HADRON99 conference
The Constituent Quark Model has provided a remarkable description of the
experimentally observed hadron spectrum but still has no firm theoretical
basis. Attempts to provide a QCD justification discussed at Hadron99 include
QCD Sum Rules, instantons, relativistic potential models and the lattice.
Phenomenological analyses to clarify outstanding problems like the nature of
the scalar and pseudoscalar mesons and the low branching ratio for were presented. New experimental puzzles include the observation of
.Comment: 10 pages, espcrc1.st
Exotic hadrons: review and perspectives
The physics of exotic hadrons is revisited and reviewed, with emphasis on
flavour configurations which have not yet been investigated. The constituent
quark model of multiquark states is discussed in some detail, as it can serve
as a guide for more elaborate approaches.Comment: 24 pages, review article, last update of references, to be published
in Few-Body Systems, special issue for the 30th anniversary of this journa
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