Schmidt, Marcel ; Jansen, M. ; Hammer, Hans-Werner (2022):
Threshold effects and the line shape of the X(3872) in effective field theory. (Publisher's Version)
In: Physical Review D, 98 (1), American Physical Society, ISSN 2470-0010, e-ISSN 2470-0029,
DOI: 10.26083/tuprints-00012796,
[Article]
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PhysRevD.98.014032.pdf Copyright Information: CC BY 4.0 International - Creative Commons, Attribution. Download (1MB) | Preview |
| Item Type: | Article |
|---|---|
| Origin: | Secondary publication |
| Status: | Publisher's Version |
| Title: | Threshold effects and the line shape of the X(3872) in effective field theory |
| Language: | English |
| Abstract: | Latest measurements suggest that the X(3872) mass lies less than 200 keV away from the D⁰D¯ ⁰* threshold, reenforcing its interpretation as a loosely bound mesonic molecule. This observation implies that in processes like D⁰D¯⁰ π⁰ production, threshold effects could disguise the actual pole position of the X(3872). We propose a new effective field theory with D⁰, D¯ ⁰, and π⁰ degrees of freedom for the X(3872), considering Galilean invariance to be an exact symmetry. The D⁰ enters as a D⁰π⁰ p-wave resonance, allowing for a comprehensive study of the influence of pion interactions on the Xð3872Þ width. We calculate relations between the mass of the X(3872), its width, and its line shape in D⁰D¯⁰ π⁰ production up to next-to-leading order. Our results provide a tool for the extraction of the X(3872) pole position from the experimental data near threshold. |
| Journal or Publication Title: | Physical Review D |
| Volume of the journal: | 98 |
| Issue Number: | 1 |
| Place of Publication: | Darmstadt |
| Publisher: | American Physical Society |
| Collation: | 19 Seiten |
| Classification DDC: | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Divisions: | 05 Department of Physics > Institute of Nuclear Physics |
| Date Deposited: | 11 Mar 2022 13:17 |
| Last Modified: | 23 Feb 2023 06:53 |
| DOI: | 10.26083/tuprints-00012796 |
| Corresponding Links: | |
| URN: | urn:nbn:de:tuda-tuprints-127964 |
| URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/12796 |
| PPN: | 505220210 |
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