Bottomonium dipion transitions

Abstract

Dipion transitions of the subthreshold bottomonium levels ${\rm Y}(nS)\to {\rm Y}(n^{\prime }S)\pi \pi$ with $n>n^{\prime },n=2,3,4,n^{\prime }=1,2$ are studied in the framework of the chiral decay Lagrangian, derived earlier. The channels $B\bar{B},B{\bar{B}}^{\ast }+c.c,B^{\ast }{\bar{B}}^{\ast }$ are considered in the intermediate state and realistic wave functions of ${\rm Y}(nS),B$ and $B^{\ast }$ are used in the overlap matrix elements. Imposing the Adler zero requirement on the transition matrix element, one obtains 2d and 1d dipion spectra in reasonable agreement with experiment.

34 pages, 18 figures

References in corpus (6)

• Scalar Resonance Contributions to the Dipion Transition Rates of ${\rm Y}(4S,5S)$ in the re-scattering model
• Strong decays and dipion transitions of Upsilon(5S)
• Di-Pion Decays of Heavy Quarkonium in the Field Correlator Method
• Two-pion transitions in quarkonium revisited
• Analysis on Heavy Quarkonia Transitions with Pion Emission in Terms of the QCD Multipole Expansion and Determination of Mass Spectra of Hybrids
• Higher ${\eta }_c(nS)$ and ${\eta }_b(nS)$ mesons

Cited by in corpus (1)

• Strong decays and dipion transitions of Upsilon(5S)