Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Klopot, Yaroslav"'
Publikováno v:
Phys. Rev. D 104, 016011 (2021)
We generalize the dispersive approach to axial anomaly by A.D. Dolgov and V.I. Zakharov to a non-Abelian case with arbitrary photon virtualites. We derive the anomaly sum rule for the singlet current and obtain the $\pi^0,\eta,\eta'\rightarrow\gamma\
Externí odkaz:
http://arxiv.org/abs/2009.04578
Publikováno v:
Phys. Rev. D 99, 016008 (2019)
Manifestations of strong and electromagnetic axial anomalies in two-photon decays of $\eta$ and $\eta'$ mesons are studied. Applying dispersive approach to axial anomaly in the singlet current, we obtain an anomaly sum rule containing strong and elec
Externí odkaz:
http://arxiv.org/abs/1802.00797
The dispersive representation of axial anomaly leads to the anomaly sum rules (ASRs), exact nonperturbative relations in QCD. The analytical continuation of the ASRs to the time-like region is performed. The transition form factors of $\pi^0$, $\eta$
Externí odkaz:
http://arxiv.org/abs/1312.1226
Publikováno v:
Nuclear Physics B (Proc. Suppl.) 245 (2013) 255-258
We have studied the applications of the anomaly sum rule to the transition form factors of light pseudoscalar mesons: $\pi^0$, $\eta$ and $\eta'$. This nonperturbative QCD approach can be used even if the QCD factorization is broken. The possibility
Externí odkaz:
http://arxiv.org/abs/1308.5184
Publikováno v:
Acta Phys.Polon.Supp. 6 (2013) 145-150
Axial anomaly leads to exact sum rules for transition form factors providing the important constraints to respective distribution amplitudes. This rigorous NPQCD approach is valid even if QCD factorization is broken. The status of possible small non-
Externí odkaz:
http://arxiv.org/abs/1212.0459
Publikováno v:
Phys.Rev. D87 (2013) 036013
Transition form factors of pi^0, eta, eta' mesons are investigated by means of the anomaly sum rule -- an exact nonperturbative relation which follows from the dispersive representation of the axial anomaly. Considering the problem of contributions o
Externí odkaz:
http://arxiv.org/abs/1211.0874
Publikováno v:
JETP Lett. 94 (2011) 729-733
Interplay between axial anomaly and quark-hadron duality in the presence of strong mixing is considered. The anomaly sum rule for meson transition form factors based on the dispersive representation of axial anomaly and quark-hadron duality in octet
Externí odkaz:
http://arxiv.org/abs/1110.0474
Publikováno v:
Phys. Rev. D 84, 051901(R) (2011)
The relation for transition form factors of eta and eta' mesons is obtained by combining the exact nonperturbative QCD sum rule, following from the dispersive representation of axial anomaly, and quark-hadron duality. It is valid at all virtual photo
Externí odkaz:
http://arxiv.org/abs/1106.3855
Publikováno v:
PoS (ICHEP 2010) 174
We study photon-meson transition formfactors of light mesons in the kinematics, where one photon is real and other is virtual. Dispersive approach to axial anomaly leads to the anomaly sum rule. The absence of corrections to it allows us to get the r
Externí odkaz:
http://arxiv.org/abs/1012.3016
Publikováno v:
Phys.Lett.B695:130-135,2011
We study the transition form factors of the light mesons in the kinematics, where one photon is real and other is virtual. Using the dispersive approach to axial anomaly we show that the axial anomaly in this case reveals itself as a collective effec
Externí odkaz:
http://arxiv.org/abs/1009.1120