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Dispersive analysis of D- and B-meson form factors with chiral and heavy-quark constraints.

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Title: Dispersive analysis of D- and B-meson form factors with chiral and heavy-quark constraints.
Authors: Mutke, Simon1 (AUTHOR) mutke@hiskp.uni-bonn.de, Heuser, Leon A.1 (AUTHOR) heuser@hiskp.uni-bonn.de, Dax, Ingrid1 (AUTHOR), Kubis, Bastian1 (AUTHOR) kubis@hiskp.uni-bonn.de, Leupold, Stefan2 (AUTHOR)
Source: European Physical Journal C -- Particles & Fields. May2026, Vol. 86 Issue 5, p1-29. 29p.
Subjects: Dispersion relations, Heavy quark effective theory, Resonance, Mathematical symmetry, Analytic functions
Abstract: We analyze the isovector vector form factors of D , D ∗ , B , and B ∗ mesons at low energies. We employ all constraints due to chiral and heavy-quark symmetry, and include the physics of resonant pion–pion rescattering in a model-independent way, using dispersion theory. Special attention is paid to the analytic properties of these form factors, which include anomalous thresholds due to triangle diagrams that are located on the physical Riemann sheets in some of the form factors. We extract the couplings of the ρ (770) resonance to all these heavy mesons by determining the appropriate pole residues. [ABSTRACT FROM AUTHOR]
Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Dispersive analysis of D- and B-meson form factors with chiral and heavy-quark constraints.
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  Data: <searchLink fieldCode="AR" term="%22Mutke%2C+Simon%22">Mutke, Simon</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mutke@hiskp.uni-bonn.de</i><br /><searchLink fieldCode="AR" term="%22Heuser%2C+Leon+A%2E%22">Heuser, Leon A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> heuser@hiskp.uni-bonn.de</i><br /><searchLink fieldCode="AR" term="%22Dax%2C+Ingrid%22">Dax, Ingrid</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kubis%2C+Bastian%22">Kubis, Bastian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> kubis@hiskp.uni-bonn.de</i><br /><searchLink fieldCode="AR" term="%22Leupold%2C+Stefan%22">Leupold, Stefan</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+C+--+Particles+%26+Fields%22">European Physical Journal C -- Particles & Fields</searchLink>. May2026, Vol. 86 Issue 5, p1-29. 29p.
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  Data: <searchLink fieldCode="DE" term="%22Dispersion+relations%22">Dispersion relations</searchLink><br /><searchLink fieldCode="DE" term="%22Heavy+quark+effective+theory%22">Heavy quark effective theory</searchLink><br /><searchLink fieldCode="DE" term="%22Resonance%22">Resonance</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+symmetry%22">Mathematical symmetry</searchLink><br /><searchLink fieldCode="DE" term="%22Analytic+functions%22">Analytic functions</searchLink>
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  Label: Abstract
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  Data: We analyze the isovector vector form factors of D , D ∗ , B , and B ∗ mesons at low energies. We employ all constraints due to chiral and heavy-quark symmetry, and include the physics of resonant pion–pion rescattering in a model-independent way, using dispersion theory. Special attention is paid to the analytic properties of these form factors, which include anomalous thresholds due to triangle diagrams that are located on the physical Riemann sheets in some of the form factors. We extract the couplings of the ρ (770) resonance to all these heavy mesons by determining the appropriate pole residues. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1140/epjc/s10052-026-15758-1
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        Text: English
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      – SubjectFull: Resonance
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      – SubjectFull: Mathematical symmetry
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      – SubjectFull: Analytic functions
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              Text: May2026
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