A QCD sum rule study for a charged bottom-strange scalar meson
| Autor: | C. M. Zanetti, Marina Nielsen, K. P. Khemchandani |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Quantum chromodynamics
Physics Strange quark Particle physics 010308 nuclear & particles physics High Energy Physics::Lattice Constraint analysis Scalar (mathematics) High Energy Physics::Phenomenology FOS: Physical sciences 01 natural sciences High Energy Physics - Experiment High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Tetraquark Sum rule in quantum mechanics 010306 general physics Scalar meson |
| Popis: | Using the QCD sum rule approach we investigate the possible four-quark structure for the new observed $B_{s}^0\pi^\pm$ narrow structure (D0). We use a diquak-antidiquark scalar current and work to the order of $m_s$ in full QCD, without relying on $1/m_Q$ expansion. Our study indicates that although it is possible to obtain a stable mass in agreement with the state found by the D0 collaboration, a more constraint analysis (simultaneous requirement of the OPE convergence and the dominance of the pole on the phenomenological side) leads to a higher mass. We also predict the masses of the bottom scalar tetraquark resonances with zero and two strange quarks. Comment: 8 pages, 8 figures |
| Databáze: | OpenAIRE |
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