Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-8913
Authors: | Deineka, Oleksandra Danilkin, Igor Vanderhaeghen, Marc |
Title: | Dispersive analysis of the γγ → DD¯ data and the confirmation of the DD¯ bound state |
Online publication date: | 14-Apr-2023 |
Year of first publication: | 2022 |
Language: | english |
Abstract: | In this paper, we present a data-driven analysis of the γγ → D+ D− and γγ → D0D¯ 0 reactions from threshold up to 4.0 GeV in the DD¯ invariant mass. For the S-wave contribution, we adopt a partial-wave dispersive representation, which is solved using the N/D ansatz. The left-hand cuts are accounted for using the model-independent conformal expansion. The D-wave χc2(3930) state is described as a BreitWigner resonance. The resulting fits are consistent with the data on the invariant mass distribution of the e+e− → J/ψ DD¯ process. Performing an analytic continuation to the complex s-plane, we find no evidence of a pole corresponding to the broad resonance X(3860) reported by the Belle Collaboration. Instead, we find a clear bound state below the DD¯ threshold at √sB = 3695(4) MeV, confirming the previous phenomenological and lattice predictions. |
DDC: | 530 Physik 530 Physics |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 08 Physik, Mathematik u. Informatik |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-8913 |
Version: | Published version |
Publication type: | Zeitschriftenaufsatz |
Document type specification: | Scientific article |
License: | CC BY |
Information on rights of use: | https://creativecommons.org/licenses/by/4.0/ |
Journal: | Physics letters : B 827 |
Pages or article number: | 136982 |
Publisher: | Elsevier |
Publisher place: | Amsterdam |
Issue date: | 2022 |
ISSN: | 1873-2445 |
Publisher DOI: | 10.1016/j.physletb.2022.136982 |
Appears in collections: | DFG-491381577-D |
Files in This Item:
File | Description | Size | Format | ||
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dispersive_analysis_of_the___-20230308111618596.pdf | 670.54 kB | Adobe PDF | View/Open |