# ${{\boldsymbol h}_{{c}}{(1P)}}$ MASS INSPIRE search

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 3525.38 \pm0.11}$ OUR AVERAGE
$3525.31$ $\pm0.11$ $\pm0.14$ 832 1
 2012 N
BES3 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \gamma}}$ hadrons
$3525.40$ $\pm0.13$ $\pm0.18$ 3679
 2010 B
BES3 ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \gamma}}{{\mathit \eta}_{{c}}}$
$3525.20$ $\pm0.18$ $\pm0.12$ 1282 2
 2008 A
CLEO ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}_{{c}}}{{\mathit \gamma}}$
$3525.8$ $\pm0.2$ $\pm0.2$ 13
 2005 B
E835 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \eta}_{{c}}}{{\mathit \gamma}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$3525.6$ $\pm0.5$ $92$ ${}^{+23}_{-22}$
 2009
CLEO ${{\mathit \psi}{(2S)}}$ $\rightarrow$ 2 ( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$)
$3524.4$ $\pm0.6$ $\pm0.4$ $168$ $\pm40$ 3
 2005
CLEO ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}_{{c}}}{{\mathit \gamma}}$
$3527$ $\pm8$ 42
 1994
E705 300 ${{\mathit \pi}^{\pm}}$, ${{\mathit p}}$ ${}^{}\mathrm {Li}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{0}}$ X
$3526.28$ $\pm0.18$ $\pm0.19$ 59 4
 1992 D
E760 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{0}}$
$3525.4$ $\pm0.8$ $\pm0.4$ 5
 1986
SPEC ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit J / \psi}}$ X
1  With floating width.
2  Combination of exclusive and inclusive analyses for the reaction ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit h}_{{c}}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \eta}_{{c}}}{{\mathit \gamma}}$ . This result is the average of DOBBS 2008A and ROSNER 2005 .
3  Superseded by DOBBS 2008A.
4  Mass central value and systematic error recalculated by us according to Eq.$~$(16) in ARMSTRONG 1993B, using the value for the ${{\mathit \psi}{(2S)}}$ mass from AULCHENKO 2003 .
References:
 ABLIKIM 2012N
PR D86 092009 Study of ${{\mathit \psi}{(3686)}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit h}_{{c}}}$ , ${{\mathit h}_{{c}}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \eta}_{{c}}}$ via ${{\mathit \eta}_{{c}}}$ Exclusive Decays
 ABLIKIM 2010B
PRL 104 132002 Measurements of ${{\mathit h}_{{c}}}({}^{1}\!{\mathit P}_{1}$) in ${{\mathit \psi}^{\,'}}$ Decays
PR D80 051106 Evidence for Decays of ${{\mathit h}_{{c}}}$ to Multipion Final States
PRL 101 182003 Precision Measurement of the Mass of the ${{\mathit h}_{{c}}}({}^{1}\mathit P_{1}$) State of Charmonium
PR D72 032001 Results of a Search for the ${{\mathit h}_{{c}}}({}^{1}{{\mathit P}_{{1}}}$) State of Charmonium in the ${{\mathit \eta}_{{c}}}{{\mathit \gamma}}$ and ${{\mathit J / \psi}}{{\mathit \pi}^{0}}$ Decay Modes
PRL 95 102003 Observation of the ${{\mathit h}_{{c}}}({}^{1}P_{1}$) State of Charmonium
PR D50 4258 Search for Hidden Charm Resonance States Decaying into ${{\mathit J / \psi}}$ or ${{\mathit \psi}^{\,'}}$ Plus Pions
PRL 69 2337 Observation of the ${}^{1}\mathit P_{1}$ State of Charmonium
PL B171 135 Search for the ${}^{1}P_{1}$ Charmonium State in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilations at the CERN Intersecting Storage Rings