Modification of the B meson mass in a magnetic field from QCD sum rules

Autor(es)

Machado, C. S. ^[1] ; Matheus, R. D. ^[1] ; Finazzo, S. I. ^[2] ; Noronha, J. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Barra Funda, SP - Brazil

^[2] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Physical Review D; v. 89, n. 7 APR 10 2014.
• Citações Web of Science: 25

Resumo

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(u,d)(2) << eB << m(b,B)(2). We found that m(B) decreases with the magnetic field in both of these limits. (AU)

• Processo FAPESP: 12/21627-9 - O setor leptônico de teorias de Gauge no Quiver: teoria e fenomenologia
• Beneficiário: Camila Sampaio Machado
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 11/05619-3 - Estados excitados de mésons charmosos
• Beneficiário: Camila Sampaio Machado
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 11/21691-6 - Estudando plasmas não-Abelianos fortemente acoplados usando a dualidade gauge/gravity
• Beneficiário: Stefano Ivo Finazzo
• Modalidade de apoio: Bolsas no Brasil - Doutorado