We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Two-photon decays of pseudotensor mesons π<sub>2</sub>(1670), π<sub>2</sub>(2250), and π<sub>2</sub>(2510).
- Authors
Anisovich, A.; Anisovich, V.; Dakhno, L.; Matveev, M.; Nikonov, V.; Sarantsev, A.
- Abstract
In terms of relativistic and gauge-invariant spectral-integral technique, we calculate amplitude for the π2 → γγ decay as a three-step transition π2 → q $$ \bar q $$(2−+) → γ + q $$ \bar q $$(1−−) → γγ. Using wave functions of the q $$ \bar q $$ components of photon (hep-ph/0406320) and those of pseudotensor mesons π2(1670), π2(2000), π2(2250), and π2(2510) (hep-ph/0511109), we obtain the following values for partial widths: Γ π2(1670)→ γγ = 0.072 ± 0.007 keV, Γ π2(2000)→ γγ = 0.037 ± 0.004 keV, Γ π2(2250)→ γγ = 0.027 ± 0.003 keV, and Γ π2(2510)→ γγ = 0.022 ± 0.002 keV. In the calculations, we use the momentum operator expansion, and, in this connection, discuss the problem of nilpotent operators inherent in the considered amplitude. It should be emphasized that measurement of two-photon decays of the π2 states can give valuable information about the long-range quark-antiquark forces which, as one may guess, are related to the quark confinement.
- Subjects
GAUGE field theory; PHOTON detectors; RADIOACTIVE decay; MESONS; NILPOTENT groups; NUCLEAR physics
- Publication
Physics of Atomic Nuclei, 2009, Vol 72, Issue 9, p1518
- ISSN
1063-7788
- Publication type
Article
- DOI
10.1134/S1063778809090129