pdgLive

${\mathit {\mathit b}}$ ${\mathit {\overline{\mathit b}}}$ MESONS
(including possibly non-${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)

INSPIRE JSON PDGID:

M204

${{\mathit h}_{{{b}}}{(1P)}}$

$I^G(J^{PC})$ = $0^-(1^{+ -})$

Quantum numbers are quark model predictions, $\mathit C$ = $−$ established by ${{\mathit \eta}_{{{b}}}}{{\mathit \gamma}}$ decay.

${{\mathit h}_{{{b}}}{(1P)}}$ MASS

$9899.3$ $\pm0.8$ MeV

${{\mathit h}_{{{b}}}{(1P)}}$ DECAY MODES

Mode

Fraction ($\Gamma_i$ / $\Gamma$)

Scale Factor/
Conf. Level

P(MeV/c)

$\Gamma_{1}$

${{\mathit \eta}_{{{b}}}{(1S)}}{{\mathit \gamma}}$

($52^{+6}_{-5}$ ) $\%$

488

$\Gamma_{2}$

${{\mathit \Upsilon}{(1S)}}{{\mathit \pi}^{0}}$

$<1.8$ $\times 10^{-3}$

CL=90%

408

Except where otherwise noted, content of the 2025 Review of Particle Physics is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy) and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2025. See LBNL disclaimers.

CONTACT US

Email:

Mailing Address:

Were you looking to order PDG products?

CITATION

MIRRORS

${{\mathit h}_{{{b}}}{(1P)}}$