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Electromagnetic form factors of the rho meson in light cone QCD sum rules
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Date
2004-11-01
Author
Alıyev, Tahmasıb
Savcı, Mustafa
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We investigate the electromagnetic form factors of the rho meson in light cone QCD sum rules. We find that the ratio of the magnetic and charge form factors is larger than 2 at all values of Q(2), (Q(2)greater than or equal to0.5 GeV2). The values of the individual form factors at fixed values of Q(2) predicted by the light cone QCD sum rules are quite different compared to the results of other approaches. These results can be checked in the future, when more precise data on rho meson form factors is available.
Subject Keywords
Nuclear and High Energy Physics
URI
https://hdl.handle.net/11511/38548
Journal
PHYSICAL REVIEW D
DOI
https://doi.org/10.1103/physrevd.70.094007
Collections
Department of Physics, Article
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Light cone QCD sum rules for the electromagnetic transition form factors among positive and negative parity octet baryons are derived. The unwanted contributions of the diagonal transitions among positive parity octet baryons are eliminated by combining the sum rules derived from different Lorentz structures. The Q(2) dependence for the transversal and longitudinal helicity amplitudes are studied.
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Electromagnetic form factors of octet baryons in QCD
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The electromagnetic form factors of octet baryons are estimated within light cone QCD sum rules method, using the most general form of the interpolating current for baryons. A comparison of our predictions on the magnetic dipole and electric form factors with the results of other approaches is performed.
Strong coupling constants of decuplet baryons with vector mesons
Alıyev, Tahmasıb; Savcı, Mustafa (American Physical Society (APS), 2010-11-10)
We provide a comprehensive study of strong coupling constants of decuplet baryons with light nonet vector mesons in the framework of light cone QCD sum rules. Using the symmetry arguments, we argue that all coupling constants entering the calculations can be expressed in terms of only one invariant function even if the SU(3)(f) symmetry breaking effects are taken into account. We estimate the order of SU(3)(f) symmetry violations, which are automatically considered by the employed approach.
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T. Alıyev and M. Savcı, “Electromagnetic form factors of the rho meson in light cone QCD sum rules,”
PHYSICAL REVIEW D
, pp. 0–0, 2004, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38548.