How does the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>X</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>3872</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> show up in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> collisions: Dip versus peak-Reference-Cited by-同舟云学术

How does the X(3872) show up in e+e− collisions: Dip versus peak

Published:2024-06-12 Issue:11 Volume:109 Page:
ISSN:2470-0010
Container-title:Physical Review D
language:en
Short-container-title:Phys. Rev. D

Author:

Baru Vadim¹^ORCID,Guo Feng-Kun²³⁴⁵³^ORCID,Hanhart Christoph⁶^ORCID,Nefediev Alexey⁷⁸^ORCID

Affiliation:

1. Ruhr-Universität Bochum

2. Institute of Theoretical Physics

3. Chinese Academy of Sciences

4. University of Chinese Academy of Sciences

5. Beihang University

6. Forschungszentrum Jülich

7. Jozef Stefan Institute

8. Instituto Superior Técnico

Abstract

We demonstrate that the dip observed near the total energy of 3872 MeV in the recent cross section data from the BESIII Collaboration for e+e−→J/ψπ+π− admits a natural explanation as a coupled-channel effect: it is a consequence of unitarity and a strong S-wave DD¯* attraction that generates the state X(3872). We anticipate the appearance of a similar dip in the e+e−→J/ψπ+π−π0 final state near the D*D¯* threshold driven by the same general mechanism, then to be interpreted as a signature of the predicted spin-2 partner of the X(3872).

Published by the American Physical Society

2024

Funder

National Key Research and Development Program of China

Chinese Academy of Sciences

National Natural Science Foundation of China

Deutsche Forschungsgemeinschaft

Javna Agencija za Raziskovalno Dejavnost RS

Publisher

American Physical Society (APS)

Link

http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.109.L111501/fulltext