Search for the Familon via B ± → π ± X 0 , B ± → K ± X 0 , and B 0 → K s 0 X 0 Decays

CLEO Collaboration

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19 Scopus citations

Abstract

We have searched for the two-body decay of the B meson to a light pseudoscalar meson h = π ± , K ± , K S 0 and a massless neutral feebly interacting particle X 0 such as the familon, the Nambu-Goldstone boson associated with a spontaneously broken global family symmetry. We find no significant signal by analyzing a data sample containing 9.7 × 10 6 BB mesons collected with the CLEO detector at the Cornell Electron Storage Ring, and set 90% C.L. upper limits V and B ± → h ± X 0 ) = 4.9 × 10 -5 and B(B → K S 0 X 0 ) = 5.3 × 10 -5 . These limits correspond to a lower bound of approximately 10 8 GeV on the family symmetry breaking scale with vector coupling involving the third generation of quarks.

Original languageEnglish (US)
Article number271801
Pages (from-to)271801-271801-5
Number of pages5
JournalPhysical Review Letters
Volume87
Issue number27 I
DOIs
StatePublished - Dec 31 2001

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