4.7 Article

B → χc1(1P, 2P)K decays in QCD factorization and X(3872)

期刊

PHYSICAL REVIEW D
卷 87, 期 7, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.87.074035

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  1. National Natural Science Foundation of China [11075002, 11021092, 10905001]
  2. Ministry of Science and Technology of China [2009CB825200]

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B -> chi(c1)(1P, 2P)K decays are studied in QCD factorization by treating charmonia as nonrelativistic bound states. No infrared divergences exist in the vertex corrections, while the logarithmic end-point singularities in the hard spectator corrections can be regularized by a momentum cutoff. Within certain uncertainties, we find that the B -> chi(c1)(2P)K decay rate can be comparable to B -> chi(c1)(1P)K and get Br(B-0 -> chi(c1)'K-0) = Br(B+ -> chi(c1)'K+) approximate to (2-4) x 10(-4). This might imply a possible interpretation for the newly discovered X(3872): that this state has a dominant J(PC) = 1(++)(2P) c (c) over bar component, but it is mixed with a substantial D-0(D) over bar*(0) + D*(0)(D) over bar (0) component. DOI: 10.1103/PhysRevD.87.074035

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