Evidence of New States Decaying into ${\Xi }_c^{\prime }\pi$

Abstract

Using 13.7 $f{b}^{-1}$ of data recorded by the CLEO detector at CESR, we report evidence for two new charmed baryons: one decaying into ${\Xi }_c^{0\prime }{\pi }^{+}$ with the subsequent decay ${\Xi }_c^{0\prime }\to {\Xi }_c^0\gamma$, and its isospin partner decaying into ${\Xi }_c^{+\prime }{\pi }^{-}$ followed by ${\Xi }_c^{+\prime }\to {\Xi }_c^{+}\gamma$. We measure the following mass differences for the two states: $M({\Xi }_c^0\gamma {\pi }^{+})-M({\Xi }_c^0)$=318.2+-1.3+-2.9 MeV, and $M({\Xi }_c^{+}\gamma {\pi }^{-})-M({\Xi }_c^{+})$=324.0+-1.3+-3.0 MeV. We interpret these new states as the $J^P=1/2^{-}{\Xi }_{c1}$ particles, the charmed-strange analogs of the ${\Lambda }_{c1}^{+}(2593)$.

10 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS

References in corpus (2)

• Evidence of New States Decaying into ${\Xi }_c^{\ast }\pi$
• Observation of Two Narrow States Decaying into ${\Xi }_c^{+}\gamma$ and ${\Xi }_c^0\gamma$

Cited by in corpus (22)

• An updated review of the new hadron states
• The Physics of the B Factories
• A review of the open charm and open bottom systems
• Baryon spectroscopy
• Progress Toward Understanding Baryon Resonances
• Observation of New States Decaying into ${\Lambda }_c^{+}{K}^{-}{\pi }^{+}$ and ${\Lambda }_c^{+}{K}_S^0{\pi }^{-}$
• Charmed and strange baryon resonances with heavy-quark spin symmetry
• Hidden charm N and Delta resonances with heavy-quark symmetry
• Observation of a new Xi(b) baryon
• Dynamically generated open charmed baryons beyond the zero range approximation
• On charm baryon resonances and chiral symmetry
• Exotic dynamically generated baryons with negative charm quantum number
• Measurement of masses of the ${\Xi }_c(2645)$ and ${\Xi }_c(2815)$ baryons and observation of ${\Xi }_c(2980)\to {\Xi }_c(2645)\pi$ %and observation of the ${\Xi }_c(2980)$ and observation of ${\Xi }_c(2980)\to {\Xi }_c(2645)\pi$
• Partial wave analysis of J/psi to p pbar pi0
• Open charm meson in nuclear matter at finite temperature beyond the zero range approximation
• Threshold effects in excited charmed baryon decays
• Radiative decays of dynamically generated charmed baryons
• Investigating the spectroscopy behavior of undetected $1F$-wave charmed baryons
• Molecular ${\Omega }_{cc}$ , ${\Omega }_{bb}$ and ${\Omega }_{bc}$ states
• 70 Years of Hyperon Spectroscopy: A review of strange $\Xi$, $\Omega$ baryons, and the spectrum of charmed and bottom baryons
• Mass spectrum and magnetic moments of singly-charmed baryons: a quark-diquark model analysis of ${\Omega }_c(3185{)}^0$ and ${\Omega }_c(3327{)}^0$
• ${\Xi }_c(3055)$ as a scaling point to establish the excited ${\Xi }_c^{(\prime )}$ family