Study of the {chi}{sub c0}(1P{sub 0}{number_sign}^{3) State of Charmonium Formed in {bar p}{number_sign}p Annihilations}

Journal Article · Fri Oct 01 04:00:00 EDT 1999 · Physical Review Letters

OSTI ID:698901

Garzoglio, G; Hahn, A; Marsh, W; Peoples, J Jr; Pordes, S; Streets, J; Werkema, S ^[1]; Ambrogiani, M; Baldini, W; Bettoni, D; Calabrese, R; Dalpiaz, P; Luppi, E; Martini, M; Mussa, R; Savrie, M; Stancari, G ^[2]; Buzzo, A; Lo Vetere, M; Macri, M ; Marinelli, M; Pallavicini, M; Patrignani, C; Robutti, E; Santroni, A ^[3]; Gollwitzer, K E; Lasio, G; Mandelkern, M; Schultz, J; Stancari, M; Zioulas, G ^[4]; Fan, X; Jin, S; Kasper, J; Maas, P; Pedlar, T K; Rosen, J; Seth, K K; Tomaradze, A ^[5]; Argiro, S; Bagnasco, S; Borreani, G; Cester, R; Marchetto, F; Menichetti, E; Obertino, M M; Pastrone, N; Rumerio, P ^[6]

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1. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
2. Istituto Nazionale di Fisica Nucleare and University of Ferrara, 44100 Ferrara (Italy)
3. Istituto Nazionale di Fisica Nucleare and University of Genova, 16146 Genova (Italy)
4. University of California at Irvine, Irvine, California 92697 (United States)
5. Northwestern University, Evanston, Illinois 60208 (United States)
6. Istituto Nazionale di Fisica Nucleare and University of Torino, 10125, Torino (Italy)

The resonance parameters of {chi}{sub c0} , the 1P{sub 0}^{3 resonance of charmonium, have been measured at the Fermilab Antiproton Accumulator by means of the reaction {bar p}p{r_arrow}{chi}{sub c0}{r_arrow}{gamma}J/{psi}{r_arrow}{gamma}(e{sup +}e{sup {minus}}) . The results are M({chi}{sub c0})=3417.4{sup +1.8}{sub {minus}1.9}{plus_minus}0.2 MeV/c{sup 2} , {Gamma}({chi}{sub c0})=16.6{sup +5.2}{sub {minus}3.7}{plus_minus}0.1 MeV , and {Gamma}({chi}{sub c0}{r_arrow}{bar p} p){times}B({chi}{sub c0} {r_arrow}J/{psi}{gamma}){times}B(J/{psi}{r_arrow} e{sup +}e{sup {minus}})=2.89{sup +0.67}{sub {minus}0 .53}{plus_minus}0.14 eV . Using known branching ratios we also obtain {Gamma}({chi}{sub c0}{r_arrow}{bar p} p)=8.0{sup +1.9+3.5}{sub {minus}1.5{minus}1.9 } keV . These results are discussed in relation to the other {chi}{sub cJ} states and to theoretical predictions. {copyright} {ital 1999} {ital The American Physical Society }}

• OSTI ID: 698901
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 83; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BRANCHING RATIO
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PAIR PRODUCTION
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PROTON-ANTIPROTON INTERACTIONS
PROTON-PROTON INTERACTIONS
RESONANCE PARTICLES