Gutenberg Open Science: Dispersive analysis of the γγ → DD¯ data and the confirmation of the DD¯ bound state

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-8913

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DC Field	Value	Language
dc.contributor.author	Deineka, Oleksandra	-
dc.contributor.author	Danilkin, Igor	-
dc.contributor.author	Vanderhaeghen, Marc	-
dc.date.accessioned	2023-04-14T10:19:53Z	-
dc.date.available	2023-04-14T10:19:53Z	-
dc.date.issued	2022	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/8929	-
dc.description.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.	en_GB
dc.language.iso	eng	de
dc.rights	CC BY	*
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	*
dc.subject.ddc	530 Physik	de_DE
dc.subject.ddc	530 Physics	en_GB
dc.title	Dispersive analysis of the γγ → DD¯ data and the confirmation of the DD¯ bound state	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-8913	-
jgu.type.contenttype	Scientific article	de
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 08 Physik, Mathematik u. Informatik	de
jgu.organisation.number	7940	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Physics letters : B	de
jgu.journal.volume	827	de
jgu.pages.alternative	136982	de
jgu.publisher.year	2022	-
jgu.publisher.name	Elsevier	de
jgu.publisher.place	Amsterdam	de
jgu.publisher.issn	1873-2445	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	530	de
jgu.publisher.doi	10.1016/j.physletb.2022.136982	de
jgu.organisation.ror	https://ror.org/023b0x485	-
jgu.subject.dfg	Naturwissenschaften	de
Appears in collections:	DFG-491381577-D

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