Search for direct production of a2(1320) and f2(1270) mesons in e+e- annihilation

A search for direct production of C-even resonances a2(1320) and f2(1270) in e+e- annihilation was performed with SND detector at VEPP-2M e+e- collider. The upper limits of electronic widths of these mesons were obtained at 90% confidence level: Gamma(a2(1320) \to e+e-) < 0.56 eV, Gamma(f2(1270) \to e+e-) < 0.11 eV.Comment: 6 pages, 5 figures, 1 table. Submitted to Phys. Lett.

Search for the radiative decay η→π0γγ\eta \to \pi^0 \gamma \gamma in the SND experiment at VEPP-2M

The $\eta \to \pi^0 \gamma \gamma$ decay was investigated by the SND detector at VEPP-2M $e^+e^-$ collider in the reaction $e^+e^-\to\phi\to \eta\gamma$. Here we present the results and some details of this study. We report an upper limit (90% c.l.) $Br(\eta \to \pi^0 \gamma \gamma)<8.4\times 10^{-4}$ as our final result. Our upper limit does not contradict the earlier measurement by GAMS spectrometer. To facilitate future studies a rather detailed review of the problem is also given.Comment: 24 pages, 6 figures, LaTex. To be published in Nucl. Phys.

Modified mode of fujinon intelligent color enhancement (FICE) in the diagnosis of colon lesions

The study aims to evaluate the effectiveness of standard and modified settings of the spectral color allocation technology in the differential diagnosis of the colon morphological type of epithelial formations. Materials and methods: video colonoscopy using standard and modified mode of technology. A total of 746 patients were selected for spectral colour selection, of whom 80 were selected. There were 36 men, 44 women. The average age of the patients was 60 ± 9 years. There were 171 epithelial fomations, of which 106 (61.9%) were located in the left side of the large intestine: in the rectum - 33 (31.2%), in sigmoid - 52 (49%), in descending part - 21 (19.8%). In the right parts of the colon there were significant lower number of formations - 65 (38.1%): ascending intestine - 26 (40%), transversely - colon - 32 (49.2%), cecum - 7 (10.8%). Endoscopic studies were performed according to standard method using video colonoscopes from Fujinon, EC-590ZW / L, EC-530WL. Results: statistically revealed that the probability of determining the correct morphological type of epithelium is formation is 6 times higher when using the modified spectral color technology highlight compared to standard technology settings. Conclusion: the modified settings of the technology of spectral color highlighting allow much more accurative performance an optical biopsy of epithelial colon formations. © 2020 Global Media Tekhnologii. All rights reserved