scholarly journals Renormalized sum rules for structure functions of heavy meson decays

1996 ◽  
Vol 53 (3) ◽  
pp. 1378-1390 ◽  
Author(s):  
A. G. Grozin ◽  
G. P. Korchemsky
Keyword(s):  
Sum Rules ◽  
Structure Functions ◽  
Heavy Meson ◽  
Meson Decays

scholarly journals Heavy-meson decay constants from QCD sum rules

2010 ◽  
Author(s):  
Wolfgang Lucha ◽  
Dmitri Melikhov ◽  
Silvano Simula ◽  
Leonardo Angelini ◽  
Pietro Colangelo ◽  
...  
Keyword(s):  
Sum Rules ◽  
Heavy Meson ◽  
Meson Decay ◽  
Qcd Sum Rules ◽  
Decay Constants

B c-meson decays and lifetime within QCD sum rules

2001 ◽  
Vol 64 (10) ◽  
pp. 1860-1875 ◽  
Author(s):  
V. V. Kiselev ◽  
A. E. Kovalsky ◽  
A. K. Likhoded
Keyword(s):  
Sum Rules ◽  
Qcd Sum Rules ◽  
Meson Decays

Factorization and vector symmetry in heavy-meson decays

1994 ◽  
Vol 107 (6) ◽  
pp. 891-899
Author(s):  
F. Uchiyama
Keyword(s):  
Heavy Meson ◽  
Meson Decays

scholarly journals Soft gluon suppression of contributions in color suppressed heavy meson decays

1995 ◽  
Vol 349 (4) ◽  
pp. 548-554 ◽  
Author(s):  
Igor Halperin
Keyword(s):  
Heavy Meson ◽  
Soft Gluon ◽  
Meson Decays

Exclusive semileptonic heavy meson decays including lepton mass effects

1990 ◽  
Vol 46 (1) ◽  
pp. 93-109 ◽  
Author(s):  
J. G. Körner ◽  
G. A. Schuler
Keyword(s):  
Heavy Meson ◽  
Meson Decays ◽  
Mass Effects

Sum rules for elastic γγ scattering and meson decays in two photons

1976 ◽  
Vol 106 (3) ◽  
pp. 451-460 ◽  
Author(s):  
P Grassberger
Keyword(s):  
Sum Rules ◽  
Meson Decays

scholarly journals Perturbative QCD effects in heavy meson decays

1990 ◽  
Vol 243 (3) ◽  
pp. 287-292 ◽  
Author(s):  
Adam Szczepaniak ◽  
Ernest M. Henley ◽  
Stanley J. Brodsky
Keyword(s):  
Perturbative Qcd ◽  
Heavy Meson ◽  
Meson Decays

scholarly journals Lattice string breaking and heavy meson decays

1999 ◽  
Vol 447 (3-4) ◽  
pp. 298-307 ◽  
Author(s):  
I.T. Drummond ◽  
R.R. Horgan
Keyword(s):  
Heavy Meson ◽  
Meson Decays

scholarly journals MOMENTS OF SPIN STRUCTURE FUNCTIONS: SUM RULES AND POLARIZABILITIES

2010 ◽  
Vol 19 (10) ◽  
pp. 1893-1921 ◽  
Author(s):  
J.-P. CHEN
Keyword(s):  
Momentum Transfer ◽  
Strong Interaction ◽  
Spin Structure ◽  
Sum Rules ◽  
Structure Functions ◽  
Operator Product ◽  
Nucleon Structure ◽  
Free Region ◽  
Wide Range ◽  
Spin Structure Functions

Nucleon structure study is one of the most important research areas in modern physics and has challenged us for decades. Spin has played an essential role and often brought surprises and puzzles to the investigation of the nucleon structure and the strong interaction. New experimental data on nucleon spin structure at low to intermediate momentum transfers combined with existing high momentum transfer data offer a comprehensive picture in the strong region of the interaction and of the transition region from the strong to the asymptotic-free region. Insight into some aspects of the theory for the strong interaction, Quantum Chromodynamics (QCD), is gained by exploring lower moments of spin structure functions and their corresponding sum rules (i.e., the Bjorken, Burkhardt–Cottingham, Gerasimov–Drell–Hearn (GDH), and the generalized GDH). These moments are expressed in terms of an operator-product expansion using quark and gluon degrees of freedom at moderately large momentum transfers. The higher-twist contributions have been examined through the evolution of these moments as the momentum transfer varies from higher to lower values. Furthermore, QCD-inspired low-energy effective theories, which explicitly include chiral symmetry breaking, are tested at low momentum transfers. The validity of these theories is further examined as the momentum transfer increases to moderate values. It is found that chiral perturbation theory calculations agree reasonably well with the first moment of the spin structure function g1 at low momentum transfer of 0.05–0.1 GeV2 but fail to reproduce some of the higher moments, noticeably, the neutron data in the case of the generalized polarizability δLT. The Burkhardt–Cottingham sum rule has been verified with good accuracy in a wide range of Q2 assuming that no singular behavior of the structure functions is present at very high excitation energies.

scholarly journals SCALING RELATION FOR THE $\Upsilon (4S)\to B\bar{B}$ AND $\psi (3770)\to D\bar{D}$ DECAY CONSTANTS FROM PHENOMENOLOGICAL SUM RULES

1995 ◽  
Vol 10 (28) ◽  
pp. 2113-2123 ◽  
Author(s):  
V.V. KISELEV
Keyword(s):  
Sum Rules ◽  
Heavy Meson ◽  
Scaling Relation ◽  
Coupling Constant ◽  
Exclusive Production ◽  
Decay Constants ◽  
Meson Coupling ◽  
Decay Widths ◽  
Heavy Quark Limit ◽  
Pair Contribution

The sum rules for exclusive production of heavy meson pairs in e+e− annihilation are used to evaluate the [Formula: see text] and [Formula: see text] decay widths. Infinitely heavy quark limit is discussed, and the scaling relation for the quarkonium-meson coupling constant is derived. The [Formula: see text] pair contribution into the leptonic constant fϒ(4S) is estimated.

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