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Author  |
Li, H.P.; Lin, J.X.; Liang, W.H.; Oset, E. |
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Title |
Determination of the K + (K)over-bar0 scattering length and effective range and its relation to the a0+ (980) from the χc1 → π+π-η reaction |
Type |
Journal Article |
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Year |
2025 |
Publication |
European Physical Journal A |
Abbreviated Journal |
Eur. Phys. J. A |
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Volume |
61 |
Issue |
5 |
Pages |
97 - 8pp |
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Abstract |
We analyze the clean cusp, seen in the eta pi mass distribution with high precision of the chi(c1)->eta pi(+)pi(-) reaction in the BESIII experiment, with the aim of making a precise determination of the scattering length a and effective range r(0) of K+(K) over bar (0). For that, we follow a previous theoretical work that gave a good reproduction of these data using the chiral unitary approach for the meson-meson interaction, and allow some flexibility in the input to carry a better fit to the data. The important task of determining the uncertainties in the scattering parameters is done using the resampling method and an accuracy in a and r(0) is obtained better than 20%. The effective range is determined for the first time with this analysis. |
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Address |
[Li, Hai-Peng; Liang, Wei-Hong; Oset, Eulogio] Guangxi Normal Univ, Dept Phys, Guilin 541004, Peoples R China, Email: liangwh@gxnu.edu.cn; |
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Publisher |
Springer |
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Language |
English |
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Original Title |
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Series Title |
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Series Volume |
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Edition |
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ISSN |
1434-6001 |
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Notes |
WOS:001482793300001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
6640 |
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