Production of New Charmoniumlike States in e{sup +}e{sup -}{yields}J/{psi}D{sup (*)}D{sup (*)} at {radical}(s){approx_equal}10.6 GeV

Journal Article · Fri May 23 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.202001· OSTI ID:21132437

Pakhlov, P; Balagura, V; Chistov, R; Danilov, M; Liventsev, D; Medvedeva, T; Mizuk, R; Pakhlova, G; Tikhomirov, I; Uglov, T ^[1]; Adachi, I; Hazumi, M; Itoh, R; Iwasaki, Y; Katayama, N; Kichimi, H; Krokovny, P; Nakao, M; Nishida, S; Ozaki, H ^[2]

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1. Institute for Theoretical and Experimental Physics, Moscow (Russian Federation)
2. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)

We report a study of the processes e{sup +}e{sup -}{yields}J/{psi}D{sup (*)}D{sup (*)}. In J/{psi}D*D* we observe a significant enhancement in the D*D* invariant mass spectrum, which we interpret as a new charmoniumlike state and denote X(4160). The X(4160) parameters are M=(4156{sub -20}{sup +25}{+-}15) MeV/c{sup 2} and {gamma}=(139{sub -61}{sup +111}{+-}21) MeV. We also report a new measurement of the X(3940) mass and width: M=(3942{sub -6}{sup +7}{+-}6) MeV/c{sup 2} and {gamma}=(37{sub -15}{sup +26}{+-}8) MeV. The analysis is based on a 693 fb{sup -1} data sample recorded near the {upsilon}(4S) resonance by the Belle detector at the KEKB asymmetric-energy collider.

• OSTI ID: 21132437
• Journal Information: Physical Review Letters, Vol. 100, Issue 20; Other Information: DOI: 10.1103/PhysRevLett.100.202001; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). Belle Collaboration; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
ASYMMETRY
D MESONS
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
GEV RANGE 10-100
J PSI-3097 MESONS
MASS
MASS SPECTRA
PARTICLE WIDTHS
POSITRONS