Axial form-factor of the radiative decay of charged pion is calculated using QCD sum rules method for non-diagonal correlator. For the ratio gamma = F(A)(0)/F(V)(0) we find gamma = 0.6 +/- 0.15.


Analysis of Radial Excitations of Octet Baryons in QCD Sum Rules
Alıyev, Tahmasıb; Bilmiş, Selçuk (Hindawi Limited, 2017-01-01)
Using the QCD sum rules method, we estimate the mass and residues of the first radial excitations of octet baryons. The contributions coming from the ground state baryons are eliminated by constructing the linear combinations of the sum rules corresponding to different Lorentz structures. Our predictions of the masses of the first radial excitations of octet baryons are in good agreement with the data.
The Lorentz and CPT violating effects on H-o -> f(+)f(-) (ZZ, W+W-) decays
Iltan, EO (World Scientific Pub Co Pte Lt, 2004-02-10)
We study the Lorentz and CPT violating effects on the ratio BRLorVio/Br-SM where BRLorVio (BRSM) is the branching ratios coming from the Lorentz violating effects (the SM), for the decays H-0 --> f(+)f(-) (f = quarks and charged leptons) and H-0 --> ZZ(W+W-). We observe that these new effects are too small to be detected, especially for f(+)f(-) output, since the corresponding coefficients are highly suppressed at the low energy scale.
Measurement of the upsilon(1S) production cross-section in pp collisions at root s=7 TeV
Aad, G.; et. al. (Elsevier BV, 2011-11-03)
A measurement of the cross-section for Upsilon(1S) -> mu(+)mu(-) production in proton-proton collisions at centre of mass energy of 7 TeV is presented. The cross-section is measured as a function of the gamma(1S) transverse momentum in two bins of rapidity, vertical bar y(gamma(1S))vertical bar 4 GeV and pseuclorapidity vertical bar eta(mu)vertical bar < 2.5 in order to reduce theoretical uncertainties on the acceptance, which depend on the poorly known polarisation. The results are based on an integrated ...
Pseudorapidity distributions of charged hadrons in xenon-xenon collisions at root S-NN=5.44 TeV
Sirunyan, A. M.; et. al. (Elsevier BV, 2019-12-01)
Measurements of the pseudorapidity distributions of charged hadrons produced in xenon-xenon collisions at a nucleon-nucleon centre-of-mass energy of root S-NN = 5.44 TeV are presented. The measurements are based on data collected by the CMS experiment at the LHC. The yield of primary charged hadrons produced in xenon-xenon collisions in the pseudorapidity range vertical bar eta vertical bar < 3.2 is determined using the silicon pixel detector in the CMS tracking system. For the 5% most central collisions, t...
Strong coupling constants of light pseudoscalar mesons with heavy baryons in QCD
Alıyev, Tahmasıb; Savcı, Mustafa (Elsevier BV, 2011-01-31)
We calculate the strong coupling constants of light pseudoscalar mesons with heavy baryons within the light cone QCD sum rules method. It is shown that sextet-sextet, sextet-antitriplet and antitriplet-antitriplet transitions are described by one universal invariant function for each class. A comparison of our results on the coupling constants with the predictions existing in literature is also presented.
Citation Formats
T. Alıyev, “FORM-FACTOR OF RADIATIVE PION DECAY IN QCD,” MODERN PHYSICS LETTERS A, pp. 2327–2334, 1991, Accessed: 00, 2020. [Online]. Available: