Charmonium production and a search for A{sub b} in Fermilab E672/E706

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Bulletin of the American Physical Society

OSTI ID:374968

Vaca, F

The authors discuss the production of various charmonium states (J/{psi}, {chi}{sub 1}, {chi}{sub 2}, and {psi}{prime}) obtained in {pi}{sup {minus}}N and pN interactions at 515 GeV/c and also pN interactions at 800 GeV/c in Fermilab experiments E672/E706. The apparatus covers the Feynman-x region 0.1{le}x{le}0.8. {psi}{prime} mesons are observed via their decays to {mu}{sup +}{mu}{sup {minus}} and J/{psi}{pi}{sup +}{pi}{sup {minus}}; {chi}{sub c} mesons via their radiative decay to J/{psi} + {gamma}. The fraction of J/{psi} resulting from {psi}{prime} and {chi}{sub c} decays is presented, as well as ratio of the production cross sections for {chi}{sub 1} and {chi}{sub 2}. The results are compared with recent phenomenological predictions. The authors also describe a search for the {Lambda}{sub b} in the decay mode J/{psi} + {Lambda}{sub 0} using the {pi}{sup {minus}}N data. No signal was found. Using the E672/E706 measurement of the b{bar b} cross section from the same data, an upper limit to the product of the {Lambda}{sub b} production fraction and branching ratio, f{sub {Lambda}{sub b}}{center_dot}Br({Lambda}{sub b} {yields} J/{psi}{Lambda}{sub 0}), will be presented.

• OSTI ID: 374968
• Report Number(s): CONF-9304297--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 2 Vol. 40; ISSN 0003-0503; ISSN BAPSA6
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHARMONIUM
CHI1-3510 MESONS
CHI2-3555 MESONS
GEV RANGE 100-1000
J PSI-3097 MESONS
LAMBDA B NEUTRAL BARYONS
NUCLEI
PARTICLE PRODUCTION
PION MINUS REACTIONS
PROTON REACTIONS