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

被引：10

作者：

Ignatov, Fedor ^{[1
]}

Lee, Roman N. ^{[1
]}

机构：

[1] SB RAS, Budker Inst Nucl Phys, Novosibirsk 630090, Russia

来源：

PHYSICS LETTERS B | 2022年 / 833卷

基金：

俄罗斯科学基金会;

关键词：

PION FORM-FACTOR; RANGE;

D O I：

10.1016/j.physletb.2022.137283

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：6

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