Precision Measurement of the Mass of the h(c)(P-1(1)) State of Charmonium - INSPIRE

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Precision Measurement of the Mass of the h(c)(P-1(1)) State of Charmonium

CLEO

Collaboration

May, 2008

9 pages

Published in:

Phys.Rev.Lett. 101 (2008) 182003

e-Print:

0805.4599 [hep-ex]

DOI:

10.1103/PhysRevLett.101.182003

PDG:

{{\mathit \psi}{(2S)}}

\rightarrow

{{\mathit h}_{{{c}}}{(1P)}}{{\mathit \pi}^{0}}

Report number:

CLNS-08-2020,
CLEO-08-04

Experiments:

CESR-CLEO-C

View in:

ADS Abstract Service

reference search107 citations

Citations per year

Abstract: (arXiv)

A precision measurement of the mass of the h_c(1P1) state of charmonium has been made using a sample of 24.5 million psi(2S) events produced in e+e- annihilation at CESR. The reaction used was psi(2S) -> pi0 h_c, pi0 -> gamma gamma, h_c -> gamma eta_c, and the reaction products were detected in the CLEO-c detector. Data have been analyzed both for the inclusive reaction and for the exclusive reactions in which eta_c decays are reconstructed in fifteen hadronic decay channels. Consistent results are obtained in the two analyses. The averaged results of the present measurements are M(h_c)=3525.28+-0.19 (stat)+-0.12(syst) MeV, and B(psi(2S) -> pi0 h_c)xB(h_c -> gamma eta_c)= (4.19+-0.32+-0.45)x10^-4. Using the 3PJ centroid mass, Delta M_hf(1P)= - M(h_c) = +0.02+-0.19+-0.13 MeV.

14.40.Gx
12.38.Qk
13.25.Gv
electron positron: colliding beams
electron positron: annihilation
charmonium
hadronic decay
h/c(3526): radiative decay
branching ratio
eta/c(2980): decay modes

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Figures(0)

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