Send Feedback
Home
pdgLive
Summary Tables
Reviews, Tables, Plots
Particle Listings
pdgLive Home
>
${{\mathit \chi}_{{{c1}}}{(1P)}}$
${\mathit {\mathit c}}$ ${\mathit {\overline{\mathit c}}}$ MESONS
(including possibly non-${\mathit {\mathit q}}$ ${\mathit {\overline{\mathit q}}}$ states)
INSPIRE search
${{\mathit \chi}_{{{c1}}}{(1P)}}$
$I^G(J^{PC})$ = $0^+(1^{+ +})$
See the Review on ``Branching Ratios of ${{\mathit \psi}{(2S)}}$, ${{\mathit \chi}}_{c0,1,2}$ and ${{\mathit \eta}_{{{c}}}{(1S)}}$'' before the ${{\mathit \chi}_{{{c0}}}{(1P)}}$ Listings.
▸ Expand all sections
▾ Collapse all sections
${{\mathit \chi}_{{{c1}}}{(1P)}}$ MASS
$3510.67 \pm0.05$ MeV (S = 1.2)
${{\mathit \chi}_{{{c1}}}{(1P)}}$ WIDTH
$0.84 \pm0.04$ MeV (S = 1.1)
MULTIPOLE AMPLITUDES IN ${{\mathit \chi}_{{{c1}}}{(1P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit J / \psi}{(1S)}}$
$\mathit a_{2}$ = $\mathit M2/\sqrt {\mathit E1{}^{2}+\mathit M2{}^{2} }$ Magnetic quadrupole fractional transition amplitude
$-0.067 \pm0.009$ (S = 2.6)
MULTIPOLE AMPLITUDES IN ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{c1}}}{(1S)}}$ RADIATIVE DECAY
$\mathit b_{2}$ = $\mathit M2/\sqrt {\mathit E1{}^{2}+\mathit M2{}^{2} }$ Magnetic quadrupole fractional transition amplitude
$0.025 \pm0.004$
MULTIPOLE AMPLITUDE RATIOS IN RADIATIVE DECAYS ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{c1}}}{(1S)}}$ and ${{\mathit \chi}_{{{c1}}}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit J / \psi}{(1S)}}$
$\mathit a_{2}/\mathit b_{2}$ Magnetic quadrupole transition amplitude ratio
$-2.3 {}^{+0.6}_{-1.0}$
${{\boldsymbol \chi}_{{{c1}}}{(1P)}}$ DECAY MODES
▸ Expand all decays
Mode
Fraction ($\Gamma_i$ / $\Gamma$)
Scale Factor/
Conf. Level
P (MeV/c)
$\Gamma_{1}$
hadrons
$\Gamma_{2}$
${{\mathit e}^{+}}{{\mathit e}^{-}}$
$(1.4^{+1.5}_{-1.0})\times 10^{-7}$
1755
▸
Hadronic decays
▸
Radiative decays
fit information