Charge asymmetry in e+e- → π+π- process

F.V. Ignatov

doi:10.1016/j.physletb.2022.137283

2022-10-01

F.V. Ignatov

Roman N. Lee *

DOI：10.1016/j.physletb.2022.137283

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摘要

En 中文

We consider the charge asymmetry in the differential cross section of the process e(+)e(-) -> pi(+)pi(-). Experimental data show large deviations from the results of the available theoretical calculations. Motivated by this fact, we revisit the contribution of the two photon exchange diagrams and find the origin of discrepancy in an oversimplified account of the pion internal structure in the theoretical calculations. We present a natural and simple approach that accounts for the pion structure in a more consistent way and find remarkable agreement with the experimental data. (C) 2022 The Author(s). Published by Elsevier B.V.

Keyword:

PION FORM-FACTOR

RANGE

期刊

Physics Letters B

IF:

4.5

论文数:

3.2W

被引数:

7.3W

机构

russian academy of sciences

学者数:

9.1W

论文数: 6.0W

被引数: 60

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