Search for b̄b̄us and b̄c̄ud tetraquark bound states using lattice QCD
- We use lattice QCD to investigate the existence of strong-interaction-stable antiheavy-antiheavy-light-light tetraquarks. We study the ¯𝑏¯𝑏𝑢𝑠 system with quantum numbers 𝐽𝑃=1+ as well as the ¯𝑏¯𝑐𝑢𝑑 systems with quantum numbers 𝐼(𝐽𝑃)=0(0+) and 𝐼(𝐽𝑃)=0(1+). We carry out computations on five gauge-link ensembles with 2+1 flavors of domain-wall fermions, including one at the physical pion mass. The bottom quarks are implemented using lattice nonrelativistic QCD, and the charm quarks using an anisotropic clover action. In addition to local diquark-antidiquark and local meson-meson interpolating operators, we include nonlocal meson-meson operators at the sink, which facilitates the reliable determination of the low-lying energy levels. We find clear evidence for the existence of a strong-interaction-stable ¯𝑏¯𝑏𝑢𝑠 tetraquark with binding energy (−86±22±10) MeV and mass (10609±22±10) MeV. For the ¯𝑏¯𝑐𝑢𝑑 systems we do not find any indication for the existence of bound states, but cannot rule out their existence either.
Author: | Stefan MeinelORCiDGND, Martin PflaumerORCiDGND, Marc WagnerORCiDGND |
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URN: | urn:nbn:de:hebis:30:3-859052 |
DOI: | https://doi.org/10.1103/PhysRevD.106.034507 |
ISSN: | 2470-0029 |
ISSN: | 2470-0010 |
ArXiv Id: | http://arxiv.org/abs/2205.13982 |
Parent Title (English): | Physical review. D : covering particles, fields, gravitation, and cosmology |
Publisher: | American Physical Society |
Place of publication: | Ridge, NY |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2022/08/17 |
Date of first Publication: | 2022/08/17 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2024/06/20 |
Volume: | 106 |
Issue: | 3, 034507 |
Article Number: | 034507 |
Page Number: | 23 |
Institutes: | Physik / Physik |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Sammlungen: | Universitätspublikationen |
Licence (German): | Creative Commons - CC BY - Namensnennung 4.0 International |