TY  - CONF
A1  - Giacosa, Francesco
T1  - Chiral anomaly and strange-nonstrange mixing
T2  - EPJ Web of Conferences
N2  - As a first step, a simple and pedagogical recall of the η-η′ system is presented, in which the role of the axial anomaly, related to the heterochiral nature of the multiplet of (pseudo)scalar states, is underlined. As a consequence, η is close to the octet and η′ to the singlet configuration. On the contrary, for vector and tensor states, which belong to homochiral multiplets, no anomalous contribution to masses and mixing is present. Then, the isoscalar physical states are to a very good approximation nonstrange and strange, respectively. Finally, for pseudotensor states, which are part of an heterochiral multiplet (just as pseudoscalar ones), a sizable anomalous term is expected: η2(1645) roughly corresponds to the octet and η2(1870) to the singlet.
Y1  - 2019
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/49998
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-499987
SN  - 2100-014X
N1  - This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
VL  - 199
IS  - Article Number 05012
PB  - EDP Sciences
CY  - Les Ulis
ER  -