scholarly journals QUARK COUNTING RULES: OLD AND NEW APPROACHES

2010 ◽  
Vol 25 (02n03) ◽  
pp. 502-512 ◽  
Author(s):  
A. RADYUSHKIN
Keyword(s):  
Asymptotic Behavior ◽  
Form Factors ◽  
Light Front ◽  
New Approaches ◽  
Counting Rules ◽  
The Subject

I discuss the subject of powerlike asymptotic behavior of hadronic form factors in pre-QCD analyses of soft (Feynman/Drell-Yan) and hard (West) mechanisms, and also recent derivation of 1/Q2 asymptotics of meson form factors in AdS/QCD. At the end, I briefly comment on "light-front holography" ansatz.

scholarly journals Applications of AdS/CFT Duality to QCD

2006 ◽  
Vol 21 (04) ◽  
pp. 762-768 ◽  
Author(s):  
Stanley J. Brodsky ◽  
Guy F. de Téramond
Keyword(s):  
Scattering Amplitudes ◽  
Quantum Chromodynamics ◽  
Power Law ◽  
Mass Parameter ◽  
Light Quark ◽  
Form Factors ◽  
Light Front ◽  
Baryon Spectrum ◽  
Conformal Theory ◽  
Counting Rules

Even though quantum chromodynamics is a broken conformal theory, the AdS/CFT correspondence has led to important insights into the properties of QCD. For example, as shown by Polchinski and Strassler, dimensional counting rules for the power-law falloff of hadron scattering amplitudes follow from dual holographic models with conformal behavior at short distances and confinement at large distances. We find that one also obtains a remarkable representation of the entire light-quark meson and baryon spectrum, including all orbital excitations, based on only one mass parameter. We also show how hadron light-front wavefunctions and hadron form factors in both the space-like and time-like regions can be predicted.

scholarly journals Mesonic tensor form factors with the light front quark model

2001 ◽  
Vol 64 (11) ◽  
Author(s):  
C. Q. Geng ◽  
C. W. Hwang ◽  
C. C. Lih ◽  
W. M. Zhang
Keyword(s):  
Quark Model ◽  
Form Factors ◽  
Light Front ◽  
Tensor Form

scholarly journals O2 State in 18 O by using Core – Polarization effects

2008 ◽  
pp. 66-72
Keyword(s):  
Perturbation Theory ◽  
Experimental Studies ◽  
Form Factors ◽  
Wave Model ◽  
Collective Model ◽  
Core Polarization ◽  
Polarization Effects ◽  
The Core ◽  
The Subject ◽  
Space Wave

Coulomb form factors for E0 transition in 18O are discussed taking into account core-polarization effects. These effects are taken into account through the collective model of Tassie and also through a microscopic perturbation theory including excitations up to 2p1f shell. Space wave model functions defined for the orbits 1 and 2125O nucleus has been the subject of extensive theoretical and experimental studies, which received much attention in last decade [Alex Brown et.al.2005]. The 18O system contains two neutrons in addition to the16O core distributed in the sd – shell. d1 are obtained from the diagonalization of the interaction Hamilonian of Wildenthal. The calculations include the 0 2state with excitation energies3.6337MeV. The core – polarization effects which incorporate the ollective model of Tassei describe the data very well for this state.

Asymptotic Behavior of Electromagnetic form Factors

1964 ◽  
Vol 12 (8) ◽  
pp. 209-211 ◽  
Author(s):  
A. P. Balachandran ◽  
Peter G. O. Freund ◽  
Clifford R. Schumacher
Keyword(s):  
Asymptotic Behavior ◽  
Form Factors ◽  
Electromagnetic Form Factors

Assessing the Benefit of Innovations in ATC

1998 ◽  
Vol 51 (3) ◽  
pp. 312-320
Author(s):  
S. Ratcliffe
Keyword(s):  
Free Flight ◽  
New Approaches ◽  
Quantitative Studies ◽  
Traffic Capacity ◽  
Recent Advances ◽  
The Subject

Recent advances in technology have encouraged proposals for new approaches to ATC in Europe and elsewhere. Two such proposals, both rather loosely framed, are for ‘free flight’ or for ‘seamless contracts’; otherwise ‘tubes of flight’. These concepts, and variations on them, aim to increase the traffic capacity of the airspace. They have been the subject of numerous published papers. Given the declared objects of these systems, it is surprising that, nearly without exception, these papers discuss the proposals only in qualitative terms. The present paper discusses idealised versions of these systems on the basis of quantitative studies. It is concluded that the ‘seamless contract’ is very probably unworkable in Europe. ‘free flight’ is workable in principle, but there is a need for investigation of possible mechanisms by which last-minute problems may be resolved.

O potrzebie badań lokalnych pogranicza na przykładzie Babimojszczyzny w XX wieku

2021 ◽  
Vol 20 (3) ◽  
pp. 21-40
Author(s):  
Katarzyna Zielińska ◽  
Keyword(s):  
World War I ◽  
20Th Century ◽  
Time Perspective ◽  
Social Memory ◽  
Historical Narratives ◽  
World War ◽  
New Approach ◽  
Real Effects ◽  
New Approaches ◽  
The Subject

The aim of the study is an attempt to refer to the historiography of a small microregion at the border of today's provinces: Lubuskie and Wielkopolskie, called "Babimojszczyzna". The time perspective relating to the events of World War I, Polish-German disputes, as well as the transformations in Poland and Germany after 1989 requires a new approach to historical narratives. The thesis of the article is the assumption that the hitherto historiography of this complex microregion in Polish-German relations in the first half of the 20th century did not develop new approaches. Another problem is the lack of real effects under the research models on the Polish and German narratives of the last thirty years. Their lack is particularly noticed in the context of the condition of social memory in the vicinity of Babimost, where only the tradition of the Polish Uprising 1918-1919 and the struggle for Polishness is cultivated, without a broader context. The discussed region can also be an interesting example for other similar historical areas, which, like all borderlands, were the subject of natural osmosis rather than their contact.

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