Year: 2017
Type: conference-paper
Abstract: In this work the behavior of power corrections to Adler function in operator product expansion (OPE) is studied, in particular the possible contribution of operator of dimension 2. The OPE terms of dimension 4 and 6 are taken into account. Various experimental data on reactions of e+e−-annihilation to pion channels (π+π−, 2π+2π−, π+π−2π0, 3π+3π−, 2π+2π−2π0) are used. The high-precision fits of the experimental data are obtained and used. The method based on Borel transformation of Adler function is applied. It is shown that the contribution of operator of dimension 2 is negative being compatible to zero at three standard deviations level. The strong (anti)correlation between short string and local gluon condensate is found.
Source: EPJ Web of Conferences
Authors: Marina Kozhevnikova, Armen Oganesian, Oleg Teryaev
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2558481968