Chromopolarizability of charm-beauty quarkonium from <i>B</i> <sub> <i>c</i> </sub>(2<i>S</i>) → <i>B</i> <sub> <i>c</i> </sub> <i>ππ</i> transition
Abstract The chromopolarizability of a charm-beauty quarkonium characterizes its interaction with soft gluonic fields and can be probed through heavy quarkonium decays. Using the dispersion theory, which considers the ππ final state interaction model-independently, we analyze the transition B c (2 S ) → B c π + π − and determine the chromopolarizability <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>α</mml:mi> </mml:mrow> <mml:mrow> <mml:msub> <mml:mrow> <mml:mi>B</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>c</mml:mi> </mml:mrow> </mml:msub> <mml:mo stretchy="false">(</mml:mo> <mml:mn>2</mml:mn> <mml:mi>S</mml:mi> <mml:mo stretchy="false">)</mml:mo> <mml:msub> <mml:mrow> <mml:mi>B</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>c</mml:mi> </mml:mrow> </mml:msub> </mml:mrow> </mml:msub> <mml:mo>=</mml:mo> <mml:mo stretchy="false">(</mml:mo> <mml:mn>0.66</mml:mn> <mml:mo>±</mml:mo> <mml:mn>0.25</mml:mn> <mml:mo stretchy="false">)</mml:mo> </mml:math> GeV −3 and the parameter κ = − 0.02 ± 0.13. Our results indicate that the transitional chromopolarizability of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>c</mml:mi> <mml:mover accent="true"> <mml:mrow> <mml:mi>b</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> </mml:math> state lies between the transitional chromopolarizabilities of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>c</mml:mi> <mml:mover accent="true"> <mml:mrow> <mml:mi>c</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> </mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>b</mml:mi> <mml:mover accent="true"> <mml:mrow> <mml:mi>b</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>¯</mml:mo> </mml:mrow> </mml:mover> </mml:math> states. These findings provide valuable insights into the interactions of charm-beauty quarkonium with light hadrons.
Authors
- Ziwei Li
- Yunhua Chen (ORCID: https://orcid.org/0000-0001-8366-2170)
Institutions
- University of Science and Technology Beijing (CN)
Publication Details
- Journal
- Communications in Theoretical Physics
- Published
- 2025-01-10
- DOI
- https://doi.org/10.1088/1572-9494/ada87f
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Fundamental Research Funds for the Central Universities