Observation of the sup 1 P sub 1 state of charmonium

Journal Article · Mon Oct 19 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.2337· OSTI ID:7197475

Armstrong, T A; Bettoni, D; Bharadwaj, V; Biino, C; Borreani, G; Broemmelsiek, D; Buzzo, A; Calabrese, R; Ceccucci, A; Cester, R; Church, M; Dalpiaz, P; Dalpiaz, P F; Dibenedetto, R; Dimitroyannis, D; Fabbri, M G; Fast, J; Gianoli, A; Ginsburg, C M; Gollwitzer, K ; Hahn, A; Hasan, M; Hsueh, S; Lewis, R; Luppi, E; Macri, M; Majewska, A M; Mandelkern, M; Marchetto, F; Marinelli, M; Marques, J; Marsh, W; Martini, M; Masuzawa, M; Menichetti, E; Migliori, A; Mussa, R; Palestini, S; Pallavicini, M; Pastrone, N; Patrignani, C; Peoples, J Jr; Pesando, L; Petrucci, F; Pia, M G; Pordes, S; Rapidis, P; Ray, R; Reid, J; Rinaudo, G; Roccuzzo, B; Rosen, J; Santroni, A; Sarmiento, M; Savrie, M; Scalisi, A; Schultz, J; Seth, K K; Smith, A; Smith, G A; Sozzi, M; Trokenheim, S; Weber, M F; Werkema, S; Zhang, Y; Zhao, J; Zioulas, G ^[1]

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1. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States) Istituto Nazionale di Fisic

We have performed a search for the {sup 1}{ital P}{sub 1} state of charmonium resonantly formed in {ital {bar p}p} annihilations, close to the center of gravity of the {sup 3}{ital P}{sub {ital J}} states. We report results from the study of the {ital J}/{psi}+{pi}{sup 0} and {ital J}/{psi}+2{pi} final states. We have observed a statistically significant enhancement in the {ital {bar p}}+{ital p}{r arrow}{ital J}/{psi}+{pi}{sup 0} cross section at {radical}{ital s} {congruent}3526.2 MeV. This enhancement has the characteristics of a narrow resonance of mass, total width, and production cross section consistent with what is expected for the {sup 1}{ital P}{sub 1} state. In our search we have found no candidates for the reactions {ital {bar p}}+{ital p}{r arrow}{ital J}/{psi}+{pi}{sup 0}+{pi}{sup 0} and {ital {bar p}}+{ital p}{r arrow}{ital J}/{psi}+{pi}{sup +}+{pi}{sup {minus}}.

• OSTI ID: 7197475
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 69:16; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

662340* -- Hadron Interactions-- (1992-)
662350 -- Decays of Mesons-- (1992-)
662420 -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
BOSONS
CHARMONIUM
CROSS SECTIONS
DATA
DECAY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
HADRON-HADRON INTERACTIONS
HADRONIC PARTICLE DECAY
HADRONS
INFORMATION
INTERACTIONS
J PSI-3097 MESONS
LIMITING VALUES
MESONS
NUCLEON-ANTINUCLEON INTERACTIONS
NUMERICAL DATA
P WAVES
PARTIAL WAVES
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PROTON-ANTIPROTON INTERACTIONS
QUARKONIUM
VECTOR MESONS