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Titolo:
Search for the eta '(c) (2(1)S(0)) charmonium resonance - art. no. 052003
Autore:
Ambrogiani, M; Argiro, S; Bagnasco, S; Baldini, W; Bettoni, D; Borreani, G; Buzzo, A; Calabrese, R; Cester, R; Dalpiaz, P; Garzoglio, G; Gollwitzer, KE; Hahn, A; Jin, S; Kasper, J; Lasio, G; Lo Vetere, M; Luppi, E; Maas, P; Macri, M; Mandelkern, M; Marchetto, F; Marinelli, N; Marsh, W; Martini, M; Menichetti, E; Mussa, R; Obertino, MM; Pallavicini, M; Pastrone, N; Patrignani, C; Peoples, J; Pordes, S; Robutti, E; Rosen, J; Rumerio, P; Santroni, A; Savrie, M; Schultz, J; Stancari, G; Stancari, M; Streets, J; Werkema, S; Zioulas, G;
Indirizzi:
Ist Nazl Fis Nucl, I-44100 Ferrara, Italy Ist Nazl Fis Nucl Ferrara Italy I-44100 Fis Nucl, I-44100 Ferrara, Italy Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA Fermilab Natl Accelerator Lab Batavia IL USA 60510 Batavia, IL 60510 USA Univ Ferrara, I-44100 Ferrara, Italy Univ Ferrara Ferrara Italy I-44100Univ Ferrara, I-44100 Ferrara, Italy Ist Nazl Fis Nucl, I-16146 Genoa, Italy Ist Nazl Fis Nucl Genoa Italy I-16146 azl Fis Nucl, I-16146 Genoa, Italy Univ Genoa, I-16146 Genoa, Italy Univ Genoa Genoa Italy I-16146Univ Genoa, I-16146 Genoa, Italy Univ Calif Irvine, Irvine, CA 92697 USA Univ Calif Irvine Irvine CA USA 92697 Calif Irvine, Irvine, CA 92697 USA Northwestern Univ, Evanston, IL 60208 USA Northwestern Univ Evanston IL USA 60208 tern Univ, Evanston, IL 60208 USA Ist Nazl Fis Nucl, I-10125 Turin, Italy Ist Nazl Fis Nucl Turin Italy I-10125 azl Fis Nucl, I-10125 Turin, Italy Univ Turin, I-10125 Turin, Italy Univ Turin Turin Italy I-10125Univ Turin, I-10125 Turin, Italy
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 5, volume: 6405, anno: 2001,
pagine: 2003 -
SICI:
0556-2821(20010901)6405:5<2003:SFTE'(>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
FERMILAB; EXPERIMENT-835; CALORIMETER; MESONS; MODEL; E760; LEP;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Ambrogiani, M Ist Nazl Fis Nucl, I-44100 Ferrara, Italy Ist Nazl Fis NuclFerrara Italy I-44100 100 Ferrara, Italy
Citazione:
M. Ambrogiani et al., "Search for the eta '(c) (2(1)S(0)) charmonium resonance - art. no. 052003", PHYS REV D, 6405(5), 2001, pp. 2003

Abstract

We report on a search by Fermilab experiment E835 for the eta'(c) (2 S-1(0)) charmonium resonance in the process (p) over barp --> eta'(c)--> gamma gamma. No signal was observed and, based on 34 pb(-1) integrated luminosity,we determine the following upper limits (90% confidence level) to the product of the branching ratios for a resonance mass in the region 3575-3660 MeV/c(2): Br(eta'(c)-->(p) over barp) x Br(eta'(c)--> gamma gamma)< 12.0x10(-8) for <Gamma>= 5 MeV; <5.9x 10(-8) for <Gamma> =10 MeV; <4.8x 10(-8) for <Gamma> = 15 MeV. Combiing the present data with those of the predecessor experiment, E760, the upper limits become 8.0x10(-8), 5.0x10(-8), and 4.5x10(-8), respectively. In the restricted region 3589-3599 MeV/c(2), where a candidate was reported by the Crystal Ball experiment, we obtain the followinglimits from the combined E760-E835 experiments: Br(eta'(c)-->(p) over barp) x Br(eta'(c)--> gamma gamma)<5.6x10(-8) for <Gamma>=5 MeV; <3.7x10(-8) for <Gamma> = 8 MeV. A comparison of these with other experimental results ispresented.

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Documento generato il 03/12/20 alle ore 20:31:12