84 research outputs found
Analytic Methods in Nonperturbative QCD
Recently developed analytic methods in the framework of the Field Correlator
Method are reviewed in this series of four lectures and results of calculations
are compared to lattice data and experiment. Recent lattice data demonstrating
the Casimir scaling of static quark interaction strongly support the FCM and
leave very little space for all other theoretical models, e.g. instanton
gas/liquid model. Results of calculations for mesons, baryons, quark-gluon
plasma and phase transition temperature demonstrate that new analytic methods
are a powerful tool of nonperturbative QCD along with lattice simulations.Comment: LaTeX, 34 pages; Lectures given at the 13th Indian-Summer School
"Understanding the Structure of Hadrons", August 28 - September 1, 2000,
Prague, Czech Republi
ĐĐŸĐ·Đ°ĐžŃĐœĐ°Ń Đ°ŃŃĐŸĐ»ĐŸĐłĐžŃĐœĐ°Ń ĐŸŃŃĐ”ĐŸŃ ĐŸĐœĐŽŃĐŸĐżĐ»Đ°ŃŃĐžĐșĐ° ĐČ Đ»Đ”ŃĐ”ĐœĐžĐž Đ»ĐŸĐșĐ°Đ»ŃĐœĐŸĐłĐŸ Đ°ŃДпŃĐžŃĐ”ŃĐșĐŸĐłĐŸ ĐœĐ”ĐșŃĐŸĐ·Đ° Đ±Đ»ĐŸĐșĐ° ŃĐ°ŃĐ°ĐœĐœĐŸĐč ĐșĐŸŃŃĐž
The authors presented the brief incidence analysis of talus osteochondral defect (local joint surface osteonecrosis of the anklebone), its etiology, pathogenesis, symptoms, modern diagnostic algorithm and described proposed surgical procedure. The operation consists of ankle joint arthrotomy, osteonecrotic tissue resection, harvesting of cylindrical mosaic osteochondral graft from low weightbared region of femoral knee joint surface and its implantation into resection cave of the anklebone. The indications to supramalleolar osteotomy for concomitant ankle frontal deformities are grounded. Rigid osteosynthesis and early movements in ankle joint are recommended. Eighteen patients with age from 20 to 58 years old were operated: 8 men and 10 women. In 13 cases (72.3%) the lesion was found in medial edge of talus trochlea, and 5 (27.7%) were lateral lesions. Treatment results of 18 patients evaluated according AOFAS score (H. Kitaoka) improved after operation from (38.2+3.3), to (88.9+3.6) when assessed one year after surgery. Two clinical case reports are presented.ĐŃĐŸĐČĐ”ĐŽĐ”ĐœŃ ĐșŃĐ°ŃĐșĐžĐč Đ°ĐœĐ°Đ»ĐžĐ· ŃĐ°ŃŃĐŸŃŃ Đ»ĐŸĐșĐ°Đ»ŃĐœĐŸĐłĐŸ ĐŸŃŃĐ”ĐŸĐœĐ”ĐșŃĐŸĐ·Đ° Đ±Đ»ĐŸĐșĐ° ŃĐ°ŃĐ°ĐœĐœĐŸĐč ĐșĐŸŃŃĐž, Đ”ĐłĐŸ ŃŃĐžĐŸĐ»ĐŸĐłĐžŃ, паŃĐŸĐłĐ”ĐœĐ”Đ·, ŃĐžĐŒĐżŃĐŸĐŒĐ°ŃĐžĐșĐ°, ŃĐŸĐČŃĐ”ĐŒĐ”ĐœĐœŃĐ” ĐżŃĐžĐœŃĐžĐżŃ ĐŽĐžĐ°ĐłĐœĐŸŃŃĐžĐșĐž. ĐŃĐ”ĐŽĐ»ĐŸĐ¶Đ”ĐœĐ° ĐŒĐ”ŃĐŸĐŽĐžĐșĐ° Ń
ĐžŃŃŃгОŃĐ”ŃĐșĐŸĐłĐŸ лДŃĐ”ĐœĐžŃ, ĐČĐșĐ»ŃŃĐ°ŃŃĐ°Ń Đ°ŃŃŃĐŸŃĐŸĐŒĐžŃ ĐłĐŸĐ»Đ”ĐœĐŸŃŃĐŸĐżĐœĐŸĐłĐŸ ŃŃŃŃĐ°ĐČĐ°, ŃДзДĐșŃĐžŃ ĐżĐ°ŃĐŸĐ»ĐŸĐłĐžŃĐ”ŃĐșĐŸĐłĐŸ ĐŸŃага, ĐČĐ·ŃŃОД Оз ĐœĐ”ĐœĐ°ĐłŃŃĐ¶Đ°Đ”ĐŒĐŸĐč Đ·ĐŸĐœŃ Đ±Đ”ĐŽŃĐ° ĐŒĐŸĐ·Đ°ĐžŃĐœĐŸĐłĐŸ ŃĐžĐ»ĐžĐœĐŽŃĐžŃĐ”ŃĐșĐŸĐłĐŸ ĐșĐŸŃŃĐœĐŸŃ
ŃŃŃĐ”ĐČĐŸĐłĐŸ Đ°ŃŃĐŸŃŃĐ°ĐœŃĐżĐ»Đ°ĐœŃĐ°ŃĐ° Ń ĐżĐŸŃлДЎŃŃŃĐ”Đč Đ”ĐłĐŸ ĐžĐŒĐżĐ»Đ°ĐœŃĐ°ŃОДĐč ĐČ Đ·ĐŸĐœŃ ĐŽĐ”ŃĐ”ĐșŃĐ° ŃĐ°ŃĐ°ĐœĐœĐŸĐč ĐșĐŸŃŃĐž. ĐŃĐž ĐœĐ°Đ»ĐžŃОО Đ·ĐœĐ°ŃĐžŃДлŃĐœŃŃ
ĐœĐ°ŃŃŃĐ”ĐœĐžĐč Đ°ĐœĐ°ŃĐŸĐŒĐžŃĐ”ŃĐșĐžŃ
ĐŸŃĐ”Đč ĐČ ĐłĐŸĐ»Đ”ĐœĐŸŃŃĐŸĐżĐœĐŸĐŒ ŃŃŃŃĐ°ĐČĐ” ĐŸĐŽĐœĐŸĐŒĐŸĐŒĐ”ĐœŃĐœĐŸ ĐżŃĐŸĐČĐŸĐŽĐžĐ»Đž ĐșĐŸŃŃОгОŃŃŃŃŃŃ ĐŸŃŃĐ”ĐŸŃĐŸĐŒĐžŃ Đ±ĐŸĐ»ŃŃДбДŃŃĐŸĐČĐŸĐč ĐșĐŸŃŃĐž Ń ĐŸŃŃĐ”ĐŸŃĐžĐœŃĐ”Đ·ĐŸĐŒ ĐŒĐ”ŃаллОŃĐ”ŃĐșĐŸĐč плаŃŃĐžĐœĐŸĐč. ĐĄ ĐžŃĐżĐŸĐ»ŃĐ·ĐŸĐČĐ°ĐœĐžĐ”ĐŒ ĐŸĐżĐžŃĐ°ĐœĐœĐŸĐč Ń
ĐžŃŃŃгОŃĐ”ŃĐșĐŸĐč ŃĐ”Ń
ĐœĐžĐșĐž ĐżŃĐŸĐŸĐżĐ”ŃĐžŃĐŸĐČĐ°ĐœŃ 18 паŃĐžĐ”ĐœŃĐŸĐČ ĐČ ĐČĐŸĐ·ŃĐ°ŃŃĐ” ĐŸŃ 20 ĐŽĐŸ 58 лДŃ: 8 ĐŒŃжОŃĐžĐœ Đž 10 Đ¶Đ”ĐœŃĐžĐœ. Đ 13 (72,3%) ŃĐ»ŃŃĐ°ŃŃ
ĐŸŃĐŒĐ”ŃĐ°Đ»ĐŸŃŃ ĐżĐŸŃĐ°Đ¶Đ”ĐœĐžĐ” ĐŒĐ”ĐŽĐžĐ°Đ»ŃĐœĐŸĐłĐŸ ĐŸŃЎДла Đ±Đ»ĐŸĐșĐ° ŃĐ°ŃĐ°ĐœĐœĐŸĐč ĐșĐŸŃŃĐž, ĐČ 5 (27,7%) - ĐœĐ°ŃŃĐ¶ĐœĐŸĐłĐŸ ĐŸŃЎДла. ĐĄŃĐ”ĐŽĐœĐžĐč балл ĐžĐœŃДгŃĐ°Đ»ŃĐœĐŸĐč ĐŸŃĐ”ĐœĐșĐž ŃĐŸŃŃĐŸŃĐœĐžŃ ĐłĐŸĐ»Đ”ĐœĐŸŃŃĐŸĐżĐœĐŸĐłĐŸ ŃŃŃŃĐ°ĐČĐ° ĐżĐŸ ŃĐșалД AOFAS (H. Kitaoka) Ń ĐČŃĐ”Ń
паŃĐžĐ”ĐœŃĐŸĐČ ĐŽĐŸ ĐŸĐżĐ”ŃĐ°ŃОО ŃĐŸŃŃĐ°ĐČĐ»ŃĐ» 38,2±3,3, ŃĐ”ŃДз ĐłĐŸĐŽ ĐżĐŸŃлД ĐŸĐżĐžŃĐ°ĐœĐœĐŸĐč ĐŸĐżĐ”ŃĐ°ŃОО - 88,9±3,6. ĐŃДЎŃŃĐ°ĐČĐ»Đ”ĐœŃ ĐŽĐČĐ° ĐșĐ»ĐžĐœĐžŃĐ”ŃĐșĐžŃ
ĐœĐ°Đ±Đ»ŃĐŽĐ”ĐœĐžŃ. ĐŃĐžĐŒĐ”ĐœĐ”ĐœĐžĐ” Đ°ŃŃĐŸĐ»ĐŸĐłĐžŃĐœĐŸĐč ĐŒĐŸĐ·Đ°ĐžŃĐœĐŸĐč ĐŸŃŃĐ”ĐŸŃ
ĐŸĐœĐŽŃĐŸĐżĐ»Đ°ŃŃĐžĐșĐž ĐżŃĐž Ń
ĐžŃŃŃгОŃĐ”ŃĐșĐŸĐŒ лДŃĐ”ĐœĐžĐž ĐŽĐ”ŃĐ”ĐșŃĐŸĐČ ŃĐ°ŃĐ°ĐœĐœĐŸĐč ĐșĐŸŃŃĐž ĐżĐŸĐ·ĐČĐŸĐ»ŃĐ”Ń ĐżĐŸĐ»ŃŃĐžŃŃ ŃĐŽĐŸĐČлДŃĐČĐŸŃĐžŃДлŃĐœŃĐ” ŃДзŃĐ»ŃŃĐ°ŃŃ Đ»Đ”ŃĐ”ĐœĐžŃ Đž ĐČĐŸŃŃŃĐ°ĐœĐŸĐČĐžŃŃ Đ°ĐœĐ°ŃĐŸĐŒĐžŃĐ”ŃĐșĐŸĐ” ŃŃŃĐŸĐ”ĐœĐžĐ” Đž Đ±ĐžĐŸĐŒĐ”Ń
Đ°ĐœĐžĐșŃ ĐłĐŸĐ»Đ”ĐœĐŸŃŃĐŸĐżĐœĐŸĐłĐŸ ŃŃŃŃĐ°ĐČĐ°
Field theory description of vacuum replicas
In this paper we develop a systematic quantum field theory based approach to
the vacuum replica recently found to exist in effective low energy models in
hadronic physics. A local operator creating the replica state is constructed
explicitly. We show that a new effective quark-quark force arises in result of
replica existence. Phenomenological implications of such a force are also
briefly discussed.Comment: RevTeX4, 23 pages, 4 Postscript figures, uses epsfig.sty, to appear
in Phys.Rev.
Non-Perturbative QCD Treatment of High-Energy Hadron-Hadron Scattering
Total cross-sections and logarithmic slopes of the elastic scattering
cross-sections for different hadronic processes are calculated in the framework
of the model of the stochastic vacuum. The relevant parameters of this model, a
correlation length and the gluon condensate, are determined from scattering
data, and found to be in very good agreement with values coming from completely
different sources of information. A parameter-free relation is given between
total cross-sections and slope parameters, which is shown to be remarkably
valid up to the highest energies for which data exist.Comment: 60 pages, Heidelberg preprin
Strong decays and with light-cone QCD sum rules
In this article, we calculate the strong coupling constants and with the light-cone QCD sum rules. Then we
take into account the small transition matrix according to
Dashen's theorem, and obtain the small decay widths for the isospin violation
processes and . We can search the strange-bottomed mesons and
in the invariant and mass distributions
respectively.Comment: 15 pages, 2 figures, revised versio
Heavy quarkonium: progress, puzzles, and opportunities
A golden age for heavy quarkonium physics dawned a decade ago, initiated by
the confluence of exciting advances in quantum chromodynamics (QCD) and an
explosion of related experimental activity. The early years of this period were
chronicled in the Quarkonium Working Group (QWG) CERN Yellow Report (YR) in
2004, which presented a comprehensive review of the status of the field at that
time and provided specific recommendations for further progress. However, the
broad spectrum of subsequent breakthroughs, surprises, and continuing puzzles
could only be partially anticipated. Since the release of the YR, the BESII
program concluded only to give birth to BESIII; the -factories and CLEO-c
flourished; quarkonium production and polarization measurements at HERA and the
Tevatron matured; and heavy-ion collisions at RHIC have opened a window on the
deconfinement regime. All these experiments leave legacies of quality,
precision, and unsolved mysteries for quarkonium physics, and therefore beg for
continuing investigations. The plethora of newly-found quarkonium-like states
unleashed a flood of theoretical investigations into new forms of matter such
as quark-gluon hybrids, mesonic molecules, and tetraquarks. Measurements of the
spectroscopy, decays, production, and in-medium behavior of c\bar{c}, b\bar{b},
and b\bar{c} bound states have been shown to validate some theoretical
approaches to QCD and highlight lack of quantitative success for others. The
intriguing details of quarkonium suppression in heavy-ion collisions that have
emerged from RHIC have elevated the importance of separating hot- and
cold-nuclear-matter effects in quark-gluon plasma studies. This review
systematically addresses all these matters and concludes by prioritizing
directions for ongoing and future efforts.Comment: 182 pages, 112 figures. Editors: N. Brambilla, S. Eidelman, B. K.
Heltsley, R. Vogt. Section Coordinators: G. T. Bodwin, E. Eichten, A. D.
Frawley, A. B. Meyer, R. E. Mitchell, V. Papadimitriou, P. Petreczky, A. A.
Petrov, P. Robbe, A. Vair
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