Observation of two narrow states decaying into xi+(c) gamma and xi0(c) gamma - INSPIRE

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Observation of two narrow states decaying into xi+(c) gamma and xi0(c) gamma

CLEO

Collaboration

Oct, 1998

11 pages

Published in:

Phys.Rev.Lett. 82 (1999) 492-496

e-Print:

hep-ex/9810036 [hep-ex]

DOI:

10.1103/PhysRevLett.82.492

PDG:

{{\mathit \Xi}_{{{c}}}^{'+}}-{{\mathit \Xi}_{{{c}}}^{+}}

MASS DIFFERENCE

Report number:

SLAC-REPRINT-1998-100,
CLNS-98-1581,
CLEO-98-13

Experiments:

CESR-CLEO-II

View in:

reference search64 citations

Citations per year

Abstract:

We report the first observation of two narrow charmed strange baryons decaying to

\Xi_c^+\gamma

and

\Xi_c^0\gamma

, respectively, using data from the CLEO II detector at CESR. We interpret the observed signals as the

\Xi_c^{+\prime}(c{su})

and

\Xi_c^{0\prime}(c{sd})

, the symmetric partners of the well-established antisymmetric

\Xi_c^+(c[su])

and

\Xi_c^0(c[sd])

. The mass differences

M(\Xi_c^{+\prime})-M(\Xi_c^+)

and

M(\Xi_c^{0\prime})-M(\Xi_c^0)

are measured to be

107.8\pm 1.7\pm 2.5

and

107.0\pm 1.4\pm 2.5 MeV/c^2

, respectively.

electron positron: colliding beams
electron positron: annihilation
charmed baryon: electroproduction
charmed baryon: radiative decay
Xi/c+: excited state
Xi/c0: excited state
Xi/c+: hadronic decay
Xi/c0: hadronic decay
charmed baryon: mass difference
fragmentation function

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