${{\boldsymbol \chi}_{{c2}}{(1P)}}$ MASS INSPIRE search

2017

LHCB

${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}{{\mathit X}}$ $\rightarrow$ 2( ${{\mathit K}^{+}}{{\mathit K}^{-}}$) ${{\mathit X}}$

$3556.10$ $\pm0.06$ $\pm0.11$

4.0k

2017

LHCB

${{\mathit \chi}_{{c2}}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$

$3555.3$ $\pm0.6$ $\pm2.2$

2.5k

2008

BELL

${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ hadrons

$3555.70$ $\pm0.59$ $\pm0.39$

ABLIKIM

2005

BES2

${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{c2}}}$

$3556.173$ $\pm0.123$ $\pm0.020$

ANDREOTTI

2005

E835

${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$

$3559.9$ $\pm2.9$

EISENSTEIN

2001

CLE2

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \chi}_{{{c2}}}}$

$3556.4$ $\pm0.7$

BAI

1999

BES

${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}$ X

$3556.22$ $\pm0.131$ $\pm0.020$

585

ARMSTRONG

1992

E760

${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \gamma}}$

$3556.9$ $\pm0.4$ $\pm0.5$

BAGLIN

1986

SPEC

${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ X

$3557.8$ $\pm0.2$ $\pm4$

⁴

GAISER

1986

CBAL

${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}$ X

$3553.4$ $\pm2.2$

⁵

LEMOIGNE

GOLI

185 ${{\mathit \pi}^{-}}$ ${}^{}\mathrm {Be}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}{}^{}\mathrm {A}$

$3555.9$ $\pm0.7$

^{, 6}

OREGLIA

CBAL

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$2 ${{\mathit \gamma}}$

$3557$ $\pm1.5$

⁷

HIMEL

1980

MRK2

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$2 ${{\mathit \gamma}}$

$3551$ $\pm11$

BRANDELIK

1979

DASP

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$2 ${{\mathit \gamma}}$

$3553$ $\pm4$

⁷

BARTEL

1978

CNTR

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$2 ${{\mathit \gamma}}$

$3553$ $\pm4$ $\pm4$

⁷ ^{, 8}

TANENBAUM

1978

MRK1

${{\mathit e}^{+}}{{\mathit e}^{-}}$

$3563$ $\pm7$

360

⁷

BIDDICK

1977

CNTR

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}$ X

• • • We do not use the following data for averages, fits, limits, etc. • • •

$3555.4$ $\pm1.3$

2013

BELL

${{\mathit \gamma}}$ ${{\mathit \gamma}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$

$3543$ $\pm10$

WHITAKER

1976

MRK1

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit J / \psi}}$2 ${{\mathit \gamma}}$

¹ From a fit of the ${{\mathit \phi}}{{\mathit \phi}}$ invariant mass with the width of ${{\mathit \chi}_{{c2}}{(1P)}}$ fixed to the PDG 2016 value.

² AAIJ 2017BI reports also m(${{\mathit \chi}_{{c2}}}$) $−$ m(${{\mathit \chi}_{{c1}}}$) = $45.39$ $\pm0.07$ $\pm0.03$ MeV.

³ Recalculated by ANDREOTTI 2005A, using the value of ${{\mathit \psi}{(2S)}}$ mass from AULCHENKO 2003 .

⁴ Using mass of ${{\mathit \psi}{(2S)}}$ = 3686.0 MeV.

⁵ ${{\mathit J / \psi}{(1S)}}$ mass constrained to 3097 MeV.

⁶ Assuming ${{\mathit \psi}{(2S)}}$ mass = 3686 MeV and ${{\mathit J / \psi}{(1S)}}$ mass = 3097 MeV.

⁷ Mass value shifted by us by amount appropriate for ${{\mathit \psi}{(2S)}}$ mass = 3686 MeV and ${{\mathit J / \psi}{(1S)}}$ mass = 3097 MeV.

⁸ From a simultaneous fit to radiative and hadronic decay channels.

References:

2017BI

PRL 119 221801

${{\mathit \chi}_{{c1}}}$ and ${{\mathit \chi}_{{c2}}}$ Resonance Parameters with the Decays ${{\mathit \chi}_{{{c1,c2}}}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$

2017BB

EPJ C77 609

Study of Charmonium Production in hadron Decays and First Evidence for the Decay ${{\mathit B}_{{s}}^{0}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \phi}}{{\mathit \phi}}$

2013

PTEP 2013 123C01

High-Statistics Study of ${{\mathit K}_S^0}$ Pair Production in Two-Photon Collisions

2008

EPJ C53 1

Study of Charmonia in Four-Meson Final States Produced in Two-Photon Collisions

ABLIKIM

2005G

PR D71 092002

Precise Measurement of Spin-Averaged ${{\mathit \chi}_{{cJ}}{(1P)}}$ Mass using Photon Conversions in ${{\mathit \psi}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{cJ}}}$

ANDREOTTI

2005A

NP B717 34

Measurement of the Resonance Parameters of the ${{\mathit \chi}_{{1}}}(1{}^{3}P_{1}$) and ${{\mathit \chi}_{{2}}}(1{}^{3}P_{2}$) States of Charmonium Formed in Antiproton-Proton Annihilations

EISENSTEIN

2001

PRL 87 061801

Experimental Investigation of the Two Photon Widths of the ${{\mathit \chi}_{{c0}}}$ and the ${{\mathit \chi}_{{c2}}}$ Mesons

BAI

1999B

PR D60 072001

Study of the Hadronic Decays of ${{\mathit \chi}_{{c}}}$ States

ARMSTRONG

1992

NP B373 35

Study of the ${{\mathit \chi}_{{1}}}$ and ${{\mathit \chi}_{{2}}}$ Charmonium States Formed in ${{\overline{\mathit p}}}{{\mathit p}}$ Annihilations

BAGLIN

1986B

PL B172 455

Formation of the ${{\mathit \chi}_{{1}}}$ and ${{\mathit \chi}_{{2}}}$ Charmonium Resonances in Antiproton Proton Annihilation and Measurement of their Masses and Total Width

GAISER

1986

PR D34 711

Charmonium Spectroscopy from Inclusive ${{\mathit \psi}^{\,'}}$ and ${{\mathit J / \psi}}$ Radiative Decays

LEMOIGNE

PL 113B 509

Measurement of Hadronic Production of the ${{\mathit \chi}_{{1}}{(3507)}^{++}}$ and ${{\mathit \chi}_{{2}}{(3553)}^{++}}$ through Their Radiative Decay to ${{\mathit J / \psi}}$

OREGLIA