QCD sum rules study of the meson Z(+)(4430)


Autoria(s): LEE, Su Houng; MIHARA, Antonio; Navarra, Fernando Silveira; Nielsen, Marina
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2008

Resumo

We use QCD sum rules to study the recently observed meson Z(+)(4430), considered as a D*D-1 molecule with J(P) = 0(-). We consider the contributions of condensates up to dimension eight and work at leading order in alpha(s). We get m(Z) = (4.40 +/- 0.10) GeV in a very good agreement with the experimental value. We also make predictions for the analogous mesons Z(s) and Z(bb) considered as D-s*D-1 and B*B-1 molecules, respectively. For Z(s) we predict mZ(s) = (4.70 +/- 0.06) GeV, which is above the D-s* D-1 threshold, indicating that it is probably a very broad state and, therefore, difficult to observe experimentally. For Z(bb) we predict m(Zbb) = (10.74 +/- 0.12) GeV, in agreement with quark model predictions. (c) 2008 Elsevier B.V. All rights reserved.

Identificador

PHYSICS LETTERS B, v.661, n.1, p.28-32, 2008

0370-2693

http://producao.usp.br/handle/BDPI/29164

10.1016/j.physletb.2008.01.062

http://dx.doi.org/10.1016/j.physletb.2008.01.062

Idioma(s)

eng

Publicador

ELSEVIER SCIENCE BV

Relação

Physics Letters B

Direitos

restrictedAccess

Copyright ELSEVIER SCIENCE BV

Palavras-Chave #TAU-DECAYS #MASS #SYMMETRY #ALPHA(S) #MESONS #Physics, Multidisciplinary
Tipo

article

original article

publishedVersion