PRODUCTION OF CHARMONIUM STATES IN PI-BE COLLISIONS AT 515 GEV C/

Authors
KORESHEV V JESIK R MENDEZ H ABRAMOV V ANTIPOV Y BALDIN B CRITTENDEN R DAVIS C DAUWE L DENISOV S DYSHKANT A DZIERBA A GLEBOV V GOLDBERG H GRIBUSHIN A KRIDER J KRINITSYN A LI R MARGULIES S MARSHALL T MARTIN J PETRUKHIN A SOLOMON J SIROTENKO V SMITH P SULANKE T SULYAEV R VACA F ZIEMINSKI A APANASEVICH L BACIGALUPI J BEGEL M BLUSK S BROMBERG C CHANG P CHOUDHARY B CHUNG WH DEBARBARO L DLUGOSZ W DUNLEA J ENGELS E FANOURAKIS G GINTHER G HARTMAN K HUSTON J KAPOOR V LIRAKIS C MANI S MANSOUR J MAUL A MILLER R OSBORNE G PELLETT D POTHIER E ROSER R SHEPARD P SKOW D SLATTERY P SORRELL L STRILEY D VARELAS N WEERASUNDARA D YOSEF C ZIELINSKI M ZUTSHI V
Citation
V. Koreshev et al., PRODUCTION OF CHARMONIUM STATES IN PI-BE COLLISIONS AT 515 GEV C/, Physical review letters, 77(21), 1996, pp. 4294-4297
Citations number
31
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
77
Issue
21
Year of publication
1996
Pages
4294 - 4297
Database
ISI
SICI code
0031-9007(1996)77:21<4294:POCSIP>2.0.ZU;2-B
Abstract
We report on chi(c1) and chi(c2) production in the Feynman:x range 0.1 < x(F) < 0.8 in 515 GeV/c pi(-)Be collisions. The chi(c) states are o bserved via their radiative decays into J/psi's. The resulting photons are detected tither as showers in the electromagnetic calorimeter or after conversion in the target as e(+)e(-) pairs in the tracking syste m. The fraction of J/psi production due to chi(c1) and chi(c2) decays is 0.443 +/- 0.041 +/- 0.035. The ratio of the chi(c1) to chi(c2) cros s section is 0.57 +/- 0.18 +/- 0.06. Our results on J/psi, psi(2S), an d chi(c) production indicate that 0.454 +/- 0.034 +/- 0.042 of J/psi's are produced directly.