Modification of the B Meson Mass in a Magnetic Field from QCD Sum Rules
| Autor: | Machado, Camila S., Finazzo, Stefano I., Matheus, Ricardo D., Noronha, Jorge |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Phys. Rev. D 89, 074027 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.89.074027 |
| Popis: | In this paper we extend the well known QCD sum rules used in the calculation of the mass of heavy mesons to estimate the modification of the charged B meson mass, m_B, in the presence of an external Abelian magnetic field, eB. Two simplifying limits were considered: the weak field limit in which the external field satisfies eB << m^2 (with m being any of the masses involved) and the strong field limit in which the field strength is small in comparison to the bottom quark mass (or the B meson mass) squared but it is large compared to the mass of the light quarks, i.e., m^2_{u,d} << eB << m^2_{b,B}. We found that m_B decreases with the magnetic field in the both of these limits. Comment: 14 pages, 8 figures |
| Databáze: | arXiv |
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