scholarly journals Effective Lagrangian approach to nuclearμ−−e−conversion and the role of vector mesons

2004 ◽  
Vol 70 (5) ◽  
Author(s):  
Amand Faessler ◽  
Th. Gutsche ◽  
Sergey Kovalenko ◽  
V. E. Lyubovitskij ◽  
Ivan Schmidt ◽  
...  
Keyword(s):  
Lagrangian Approach ◽  
Vector Mesons ◽  
Effective Lagrangian

scholarly journals Vector mesons within the effective lagrangian approach

1985 ◽  
Vol 254 ◽  
pp. 71-88 ◽  
Author(s):  
Y. Brihaye ◽  
Namik K. Pak ◽  
P. Rossi
Keyword(s):  
Lagrangian Approach ◽  
Vector Mesons ◽  
Effective Lagrangian

scholarly journals The $\gamma p \to na^{+}_{2}(1320) \to n \rho^0 \pi^+$ reactions within an effective Lagrangian approach

2014 ◽  
Vol 23 (06) ◽  
pp. 1460002 ◽  
Author(s):  
Yin Huang ◽  
Ju-Jun Xie ◽  
Xu-Rong Chen ◽  
Jun He ◽  
Hong-Fei Zhang
Keyword(s):  
Photon Energy ◽  
Cross Sections ◽  
Good Description ◽  
Invariant Mass Distribution ◽  
Lagrangian Approach ◽  
Total Cross Sections ◽  
Effective Lagrangian ◽  
Current Experimental Data ◽  
Theoretical Results

We investigate the tensor meson a2(1320) photon-production off proton in the [Formula: see text] and γp → nρ0π+ reactions within the effective Lagrangian approach and isobar model. For [Formula: see text] reaction, by considering the contributions from only the t-channel π+ exchange, we get a fairly good description of the current experimental data for the total cross-section. Based on the theoretical results of the [Formula: see text] reaction, we studied the role of a2(1320) meson in the γp → nρ0π+ reaction, which mainly contributes to the γp → nπ+π+π- reaction. The latter reaction has been measured by the CLAS Collaboration at the photon energy Eγ around 5.1 GeV. For the γp → nρ0π+ reaction, we pay attention to the low photon energy region where the contribution from a2(1320) meson is dominant, while the contribution from the π2(1670) meson could be very small and hence can be neglected. The total cross-sections, invariant mass distribution and the Dalitz plot of γp → nρ0π+ reaction are shown, which can be tested by future experiments.

scholarly journals Photoproduction γp→K+Λ(1520) in an effective Lagrangian approach

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Neng-Chang Wei ◽  
Yu Zhang ◽  
Fei Huang ◽  
De-Min Li
Keyword(s):  
Lagrangian Approach ◽  
Effective Lagrangian

scholarly journals Effective-Lagrangian approach to γγ → WW I: Couplings and amplitudes

2006 ◽  
Vol 45 (3) ◽  
pp. 679-691 ◽  
Author(s):  
O. Nachtmann ◽  
F. Nagel ◽  
M. Pospischil ◽  
A. Utermann
Keyword(s):  
Lagrangian Approach ◽  
Effective Lagrangian

scholarly journals KÄHLER STABILIZED, MODULAR INVARIANT HETEROTIC STRING MODELS

2007 ◽  
Vol 22 (08n09) ◽  
pp. 1451-1588 ◽  
Author(s):  
MARY K. GAILLARD ◽  
BRENT D. NELSON
Keyword(s):  
Heterotic String ◽  
Target Space ◽  
Modular Invariant ◽  
Heterotic String Theory ◽  
Effective Lagrangian ◽  
Parity Conservation ◽  
Weakly Coupled ◽  
String Models ◽  
Early Universe Cosmology

We review the theory and phenomenology of effective supergravity theories based on orbifold compactifications of the weakly-coupled heterotic string. In particular, we consider theories in which the four-dimensional theory displays target space modular invariance and where the dilatonic mode undergoes Kähler stabilization. A self-contained exposition of effective Lagrangian approaches to gaugino condensation and heterotic string theory is presented, leading to the development of the models of Binétruy, Gaillard and Wu. Various aspects of the phenomenology of this class of models are considered. These include issues of supersymmetry breaking and superpartner spectra, the role of anomalous U(1) factors, issues of flavor and R-parity conservation, collider signatures, axion physics, and early universe cosmology. For the vast majority of phenomenological considerations the theories reviewed here compare quite favorably to other string-derived models in the literature. Theoretical objections to the framework and directions for further research are identified and discussed.

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