Strong couplings in broken SU(4)

1980 ◽  
Vol 58 (8) ◽  
pp. 1070-1074 ◽  
Author(s):  
P. N. Pandit ◽  
M. P. Khanna ◽  
Ramesh C. Verma
Keyword(s):  
Symmetry Breaking ◽  
Strong Coupling ◽  
Coupling Constants ◽  
Intermediate States

Symmetry breaking effects on the strong coupling constants are studied assuming intermediate states to be nonexotic and s–u channel symmetry of the symmetry breaking Hamiltonian. Numerical values of the charmed and uncharmed [Formula: see text] BP couplings are calculated.

scholarly journals Strong Coupling Constants in Broken SU(3)

1979 ◽  
Vol 62 (4) ◽  
pp. 1152-1154 ◽  
Author(s):  
S. Kanwar ◽  
R. C. Verma ◽  
M. P. Khanna
Keyword(s):  
Strong Coupling ◽  
Coupling Constants

Gauge hierarchies for chiral SU(N) × SU(N) groups

1976 ◽  
Vol 54 (16) ◽  
pp. 1660-1663 ◽  
Author(s):  
Shalom Eliezer
Keyword(s):  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Gauge Theories ◽  
Vacuum Expectation ◽  
Coupling Constants ◽  
Spontaneous Breaking ◽  
Text Representation ◽  
Algebraic Equations ◽  
Expectation Values ◽  
Special Case

We have presented a special case where a hierarchy of spontaneous breaking of the symmetries can be achieved in conventional gauge theories (i.e. the Higgs scalars are elementary bosons and the coupling constants of the quartic interactions are small). We break spontaneously the chiral group SU(N) × SU(N) with Higgs scalars transforming like the (N, [Formula: see text]) representation of SU(N) × SU(N). By minimizing the potential we obtain a set of algebraic equations of the type[Formula: see text]where ηj are the vacuum expectation values of the Higgs scalars and μi2 and Aij are parameters. In order to get a hierarchy of spontaneous symmetry breaking we obtain the condition det Aij = 0.

scholarly journals Small-x behavior of the structure function F2 and its slope ∂lnF2/∂ln(1/x) for “frozen” and analytic strong-coupling constants

2009 ◽  
Vol 679 (4) ◽  
pp. 350-354 ◽  
Author(s):  
Gorazd Cvetič ◽  
Alexey Yu. Illarionov ◽  
Bernd A. Kniehl ◽  
Anatoly V. Kotikov
Keyword(s):  
Structure Function ◽  
Strong Coupling ◽  
Coupling Constants ◽  
Small X

Strong Coupling Constants of the Octet Baryons to K and π Mesons in Light Cone QCD Sum Rules

2007 ◽  
Author(s):  
T. M. Aliev ◽  
A. Ozpineci ◽  
S. Yakovlev ◽  
V. S. Zamiralov ◽  
Pietro Colangelo ◽  
...  
Keyword(s):  
Strong Coupling ◽  
Light Cone ◽  
Sum Rules ◽  
Coupling Constants ◽  
Qcd Sum Rules ◽  
Octet Baryons

scholarly journals SUM RULES FOR TETRAQUARK DECAY COUPLING CONSTANTS WITH BROKEN SU(3) SYMMETRY

2012 ◽  
Vol 27 (29) ◽  
pp. 1250165 ◽  
Author(s):  
V. GUPTA ◽  
G. SÁNCHEZ-COLÓN ◽  
S. RAJPOOT
Keyword(s):  
Symmetry Breaking ◽  
Sum Rules ◽  
Coupling Constants ◽  
First Order

We give sum rules for tetraquark decay coupling constants, taking into account the SU(3) symmetry breaking interactions to first order.

MESONS AND DIQUARKS IN A NJL MODEL AT FINITE TEMPERATURE AND CHEMICAL POTENTIAL

1993 ◽  
Vol 08 (07) ◽  
pp. 1295-1312 ◽  
Author(s):  
D. EBERT ◽  
YU. L. KALINOVSKY ◽  
L. MÜNCHOW ◽  
M.K. VOLKOV
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Finite Temperature ◽  
Chemical Potential ◽  
Chiral Symmetry Breaking ◽  
Baryon Number ◽  
Coupling Constants ◽  
Number Density ◽  
Njl Model

An extended NJL model with [Formula: see text] and (qq)-interactions is studied at finite temperature and baryon number density. We investigate the chiral symmetry breaking, its restoration and the behavior of meson and diquark masses, decay and coupling constants as functions of T and µ.

Critical coupling constants in chiral-symmetry breaking

1983 ◽  
Vol 28 (6) ◽  
pp. 1530-1536 ◽  
Author(s):  
A. Amer ◽  
A. Le Yaouanc ◽  
L. Oliver ◽  
O. Pène ◽  
J -C. Raynal
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Chiral Symmetry Breaking ◽  
Coupling Constants ◽  
Critical Coupling

scholarly journals Analysis of the strong vertices of Σc∗ND and Σb∗NB in QCD sum rules

2017 ◽  
Vol 32 (35) ◽  
pp. 1750203 ◽  
Author(s):  
Guo-Liang Yu ◽  
Zhi-Gang Wang ◽  
Zhen-Yu Li
Keyword(s):  
Strong Coupling ◽  
Sum Rules ◽  
Form Factors ◽  
Coupling Constants ◽  
Strong Interactions ◽  
Dirac Structure ◽  
Qcd Sum Rules ◽  
Analytical Functions ◽  
Heavy Baryons ◽  
Perturbative Part

The strong coupling constants not only are important to understand the strong interactions of the heavy baryons, but can also help us reveal the nature and structure of these baryons. Additionally, researchers indeed have made great efforts to calculate some of the strong coupling constants, [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], etc. In this paper, we analyze the strong vertices [Formula: see text] and [Formula: see text] using the three-point QCD sum rules under the Dirac structure of [Formula: see text]. We perform our analysis by considering the contributions of the perturbative part and the condensate terms of [Formula: see text] and [Formula: see text]. After the form factors are calculated, they are then fitted into analytical functions which are used to get the strong coupling constants for these two vertices. The final results are [Formula: see text] and [Formula: see text].

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