scholarly journals Quark Triangle Diagrams and Radiative Meson Decays

1997 ◽  
Vol 50 (1) ◽  
pp. 155
Author(s):  
N. R. Jones ◽  
Dongsheng Liu
Keyword(s):  
Experimental Data ◽  
Heavy Meson ◽  
Coupling Constants ◽  
Experimental Confirmation ◽  
Light Meson ◽  
Meson Decay ◽  
Triangle Diagram ◽  
Meson Decays ◽  
Data Yield ◽  
Radiative Meson Decays

The radiative meson decays V→ Pγ and P →γγ are analysed using the quark triangle diagram. Experimental data yield well determined estimates of the universal quark–antiquark–meson couplings gvqq′ and gpqq′ for the light meson sector. Also predictions for the ratios of neutral to charged heavy meson decay coupling constants are given and await experimental confirmation.

scholarly journals MESON PVV INTERACTIONS ARE DETERMINED BY QUARK LOOPS

1999 ◽  
Vol 14 (27) ◽  
pp. 4331-4345 ◽  
Author(s):  
R. DELBOURGO ◽  
DONGSHENG LIU ◽  
M. D. SCADRON
Keyword(s):  
External Momentum ◽  
Coupling Constants ◽  
P Wave ◽  
Wave State ◽  
Mixing Angles ◽  
Meson Decays ◽  
Three Body ◽  
Radiative Meson Decays ◽  
Quark Loops

We show that all abnormal parity three-body meson interactions can be adequately described by quark loops, evaluated at zero external momentum, with couplings determined by U(Nf) symmetry. We focus primarily on radiative meson decays which involve one pseudoscalar. The agreement with experiment for nonrare decays is surprisingly good and requires very few parameters, namely the coupling constants gπqq and gρqq and some mixing angles. This agreement extends to some three-body decays that are dominated by pion pairs in a P-wave state.

Theory and phenomenology of radiative meson decays

1977 ◽  
Vol 55 (15) ◽  
pp. 1301-1309 ◽  
Author(s):  
P. J. O'Donnell
Keyword(s):  
Experimental Data ◽  
Quark Model ◽  
Radiative Decays ◽  
Meson Decays ◽  
Vector Dominance ◽  
Radiative Meson Decays

The experimental data on the radiative decays of mesons (not involving charm) are reviewed. The consistency of these data with SU(3) symmetry, vector dominance, and the quark model is discussed.

RECENT RESULTS FROM THE WASA-at-COSY EXPERIMENT: LIGHT MESON DECAYS

2011 ◽  
Vol 26 (03n04) ◽  
pp. 474-479
Author(s):  
◽  
ANDRZEJ KUPSC
Keyword(s):  
Light Meson ◽  
Meson Decay ◽  
Decay Channels ◽  
Meson Decays ◽  
The World ◽  
The Status

Studies of light meson decays are the key experiments for the WASA detector at COSY-Jülich. One of the world largest data samples of the η meson decays have been recently collected in the pd →3 He η and in the pp → ppη reactions. The status of the analysis of various decay channels and the further plans for the light meson decay program are presented.

scholarly journals Signals of the QCD axion with mass of 17  MeV/c2 : Nuclear transitions and light meson decays

2021 ◽  
Vol 103 (5) ◽  
Author(s):  
Daniele S. M. Alves
Keyword(s):  
Light Meson ◽  
Meson Decays ◽  
Nuclear Transitions

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

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

scholarly journals Spin-Spin Coupling Constants 1J(15N,11B) in Boron-Nitrogen Compounds. Experimental Data and DFT Calculations

2007 ◽  
Vol 62 (2) ◽  
pp. 220-224 ◽  
Author(s):  
Bernd Wrackmeyer ◽  
Oleg L. Tok
Keyword(s):  
Experimental Data ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Positive Sign ◽  
Nitrogen Compounds ◽  
Dft Methods ◽  
Spin Coupling Constants ◽  
Fermi Contact ◽  
Spin Spin Coupling ◽  
Boron Nitrogen

Boron-nitrogen compounds were studied with respect to indirect nuclear 15N-11B spin-spin coupling (1J(15N,11B)). Some new experimental data were determined for aminoboranes and tetra-Npyrrolylborate, and a variety of compounds with B-N single, double and triple bonds were examined using DFT methods for the calculation of 1J(15N,11B) at the B3LYP/6-311+G(d,p) level of theory. The calculations predict magnitude and sign of 1J(15N,11B) reasonably well, and the Fermi contact term was found to be dominant. A positive sign of 1J(15N,11B) was calculated in the case of 1-azacloso- dodecaborane(12), in contrast to all other compounds studied.

scholarly journals An approach to determine enthalpies of formation for ternary compounds

2010 ◽  
Vol 46 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Y. Du ◽  
J. Wang ◽  
Y.F. Ouyang ◽  
L.J. Zhang ◽  
Z.H. Yuan ◽  
...  
Keyword(s):  
Experimental Data ◽  
First Principles ◽  
Integrated Approach ◽  
Enthalpies Of Formation ◽  
Calphad Approach ◽  
Miedema Model ◽  
Theoretical Computation ◽  
Ternary Compounds ◽  
Data Yield ◽  
Experimental Values

An integrated approach of experiment and theoretical computation to acquire enthalpies of formation for ternary compounds is described. The enthalpies of formation (DHf ) for Al71Fe19Si10 and Al31Mn6Ni2 are measured via a calorimeter. Miedema model, CALPHAD and first-principles method are employed to calculate DHf for the above compounds and several Al-based ternary compounds. It is found that first-principles generated data yield good agreements with experimental values and thus can be used as key 'experimental data', which are needed for CALPHAD approach.

scholarly journals Studies of light meson decays at KLOE

2013 ◽  
Author(s):  
Christoph Redmer
Keyword(s):  
Light Meson ◽  
Meson Decays
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