Hadronic decays of the X(3872) to χcJ in effective field theory

被引：85

作者：

Fleming, Sean ^{[1
]}

Mehen, Thomas ^{[2
]}

机构：

[1] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[2] Duke Univ, Dept Phys, Durham, NC 27708 USA

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 09期

关键词：

D O I：

10.1103/PhysRevD.78.094019

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The decays of the X(3872) to P-wave quarkonia are calculated under the assumption that it is a shallow bound state of neutral charmed mesons. The X(3872) is described using an effective theory of non-relativistic D mesons and pions (X-EFT). We calculate X(3872) decays by first matching heavy hadron chiral perturbation theory (HH chi PT) amplitudes for D-0(D) over bar (*0) -> chi(cJ)(pi(0), pi pi) onto local operators in X-EFT, and then using these operators to calculate the X(3872) decays. This procedure reproduces the factorization theorems for X(3872) decays to conventional quarkonia previously derived using the operator product expansion. For single pion decays, we find nontrivial dependence on the pion energy from HH chi PT diagrams with virtual D mesons. This nontrivial energy dependence can potentially modify heavy-quark symmetry predictions for the relative sizes of decay rates. At leading order, decays to final states with two pions are dominated by the final state chi(c1) pi(0) pi(0), with a branching fraction just below that for the decay to chi(c1) pi(0). Decays to all other final states with two pions are highly suppressed.

引用

页数：7

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