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June 15, 2026
Sociologists: Conservative Consumers Dominate Russian Middle Class
The Russian middle class cannot be regarded as a homogeneous and uniformly stable social group. Similar income levels often mask significant differences in financial strategies, lifestyles, and levels of economic security. This is the conclusion reached by sociologists at HSE University. The study has been published in Voprosy Ekonomiki.
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Precise Measurement of the D0 and D+ Lifetimes at Belle II

Physical Review Letters. 2021. Vol. 127. No. 21. Article 211801.
Abudinén F., Bodrov D., Mizuk R., Pakhlov P., Popov V., Uglov T.

We report a measurement of the D-0 and D+ lifetimes using D-0 -> K-pi(+) and D+ -> K-pi(+)pi(+) decays reconstructed in e(+)e(-) -> c (c) over bar data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy e(+)e(-) collider. The data, collected at center-of-mass energies at or near the (sic)(4S) resonance, correspond to an integrated luminosity of 72 fb(-1). The results, (tau)(D-0) = 410.5 +/- 1.1 (stat) +/- 0.8(syst) fs and tau(D-0) = 1030.4 +/- 4.7 (stat) +/- 3.1 (syst) fs, are the most precise to date and are consistent with previous determinations.

Research target: Physics
Language: English
DOI
Keywords: LifetimeCharm physics
Publication based on the results of:
Investigation of the nature of the bottomonium states on the data of the Belle experiment and development of new research methods in charm and tau-lepton physics in experiments on electron-positron colliders (2021)
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