e+e-湮没中强相互作用和τ子(陶子) 衰变过程实验室

The Laboratory analyzes the data accumulated in the BaBar experiment on electron positron collider PEP-II at the Stanford Linear Accelerator Center (SLAC, USA). More than 4 thousand specialists from almost 40 countries participate in this collaboration. At present they are conducting experiments on the detector which is 25 meters long and 15 meters in diameter. The experiment was conducted during the period from 1999 until 2008 at the energy in the center of mass system of about 10 GeV. Experimental data with integral luminosity of about 500 fb-1 were collected, which corresponds to the birth of 500 million pairs of B-mesons, 500 million pairs of tau-leptons and approximately 3 billion of charmed hadrons. During the experimental runs approximately 100 million Y(2S)- and 120 million Y(3S)-mesons were produced at the energy levels lower than B-meson particle-producing threshold.

Novosibirsk physicists is working on solving the following problems:

  •  e+e- annihilation into hadron pairs in a broad energy range using radiation transfer method;
  •  Measurement of transition formfactors in two-photon collision for gamma*gamma(*) -> P and gamma(*)gamma(*)->PP where P is a pseudoscalar meson;
  •  Measurement of the vector spectral functions in hadron decay of tau-leptons.
Research area expert: Vladimir Prokopievich Druzhinin (Sc. D.) (Physics and Mathematics), druzinin@inp.nsk.su

Elementary Particle Physics Section at Physics Department (NSU)
Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Siences