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Why quarkonium hybrid coupling to two S -wave heavy-light mesons is not suppressed

Journal Article · · Physical Review. D.

We examine the couplings of quarkonium hybrids to heavy-light meson pairs in the Born-Oppenheimer approximation for QCD. The lowest hybrid multiplets consist of bound states of the Π u and Σ u potentials. We find that the Σ u potential can couple to pairs of S -wave mesons through string breaking, while the Π u potential cannot. From this observation, we derive model-independent selection rules that contradict previous expectations that quarkonium hybrids are forbidden to decay into pairs of S -wave mesons. These Born-Oppenheimer selection rules are consistent with the partial decay widths of the lowest charmonium hybrid with exotic quantum numbers J P C = 1 + recently calculated using lattice QCD.

Published by the American Physical Society 2024

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0011726
OSTI ID:
2284015
Alternate ID(s):
OSTI ID: 2287127
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 3 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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