6,537 research outputs found
Borromean binding
A review is first presented of the Hall--Post inequalities relating -body
to -body energies of quantum bound states. These inequalities are then
applied to delimit, in the space of coupling constants, the domain of Borromean
binding where a composite system is bound while smaller subsystems are unbound.Comment: 5 pages, Dedicated to V.B. Belyaev for his 70th birthday, to be
included in a jubilee volume, edited by A.K.Motovilov and F.M.Pen'ko
Stability of the Hydrogen and Hydrogen-like Molecules
We present a simple proof of the stability of the hydrogen molecule
. It does not rely on the proton-to-electron mass ratio
being very large, and actually holds for arbitrary values of . Some
asymmetric molecules of the type are also stable.
Possible applications to molecules containing antiparticles and to exotic
hadrons in the quark model are briefly outlined. Revtex Version 3.0, 4 Figures
available on request by Fax or Mail
Borromean molecules
For some values of the constituent masses m_i, the hydrogen-like molecule
(m_1^+,m_2^+,m_3^-,m_4^-) is stable with respect to spontaneous dissociation
into two neutral atoms, while none of its three-body subsystems such as
(m_1^+,m_2^+,m_3^-) is stable. This occurs in particular in the neighbourhood
of the (M^+,m^+,M^-,m^-) configuration with M/m=2, as for instance for the
molecule (p,d,\bar{p},\bar{d}) involving an antiproton and an antideuteron.Comment: 3 pages, Talk given at the XVIII European Few-Body Conference, Bled,
Slovenia, September 2002, to app. in Few-Body Sys. Supp
Steiner-tree confinement and tetraquarks
The linear confinement in quarkonium is generalised as a minimal tree, with
interesting geometrical properties. This model binds tetraquarks more easily
than the additive model used in earlier investigations.Comment: 6 pages, 1 fig., Contr. "Excited QCD", Zakopane, Poland, Proc. to be
published in Acta Physica Polonic
Spin and Flavour: Concluding Remarks
Summmary talk at the Workshop on Sin and Flavour in Hadronic and
Electromagnetic Interactions, Turin (Italy), september 1992, to appear in the
Proceedings,Comment: 13pages, ISN 93-1
Hadrons with Two Heavy Quarks
We review the spectroscopy and some properties of hadrons containing two
charmed quarks, or more generally, two heavy quarks. This includes heavy
baryons such as , and possible exotic multiquark states.Comment: Talk given at the CHARM 2000 Workshop, Fermilab, June 1994 to appear
in the Proceedings Latex, style file "charm2000" appende
Baryon spectroscopy and heavy quarks
Two topics are briefly reviewed in this talk: the decay of flavored hadrons
or quarkonium states involving a baryon--antibaryon pair, and the spectroscopy
of heavy baryons containing one, two or three heavy quarks. Some prospects for
exotic heavy baryons are also discussed.Comment: 5 pages, 2 figures, Invited talk at "Charm 2010", 4th Int. Workshop
on Charm Physics, Oct. 21-24, 2010, IHEP, Beijing, China, to appear in the
Proceedings, ed.\ Hai-Bo Li et al., to be published in IJMPC
Few-Body Problems in Hadron Spectroscopy
Some rigorous results can be derived using a very simple approach to hadron
spectroscopy, in which a static potential is associated with non-relativistic
kinematics. Several regularities of the experimental spectrum are explained by
such models. It is underlined that certain methods developed for hadronic
physics have found applications in other fields, in particular atomic physics.
A few results can be extended to cases involving spin-dependent forces or
relativistic kinematics.Comment: Latex with espcrc1, Invited Talk at the 17th European Conference on
Few-Body Physics, 11--16 September 2000, Evora, Portugal, to appear in
Nuclear Physics A. Misprint corrected p.2, thanks to A. Ga
The Role of Flavor in Multiquark Spectroscopy
In several mechanisms proposed for multiquark binding, the flavor content of
the quark configuration plays a very important role. We shall review some past
or recent results on multiquarks dealing with the chromomagnetic interaction
and with the spin-independent potential among quarks.Comment: 6 pages, 1 figures, pdflatex, Presented at the International Workshop
on Strangeness Nuclear Physics (SNP12), August 27 - 29, 2012, Neyagawa,
Osaka, Japa
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
- âŠ