Study of the strong interaction effects associated with heavy quark systems in the. Upsilon. (4S) energy region

Thesis/Dissertation · Mon Jan 01 04:00:00 EST 1990

OSTI ID:7235102

Yao, Weiming

The specific strong interaction effects associated with heavy quark systems in the {Upsilon}(4S) energy region have been studied using data collected with the CLEO detector at the Cornell Electron Storage Ring (CESR). The author reports on the observation of {psi} mesons from {Upsilon}(4S) decays which are too energetic to come from B mesons. These events provide the first evidence for non-B{bar B} decay of the {Upsilon}(4S). The measured rate is B{tau}({Upsilon}(4S) {yields} {psi}X) = (0.22 {plus minus} 0.06 {plus minus} 0.04)T for {psi} momenta above 2 GeV/c. He also reports on the first positive evidence of a signal for D{sub s}{sup +} {yields} {phi}l{sup +}{nu}. He has measured the ratio {Gamma}(D{sub s}{sup +} {yields} {phi}l{sup +}{nu})/{Gamma}(D{sub s}{sup +} {yields} {phi}{pi}{sup +}) = 0.49 {plus minus} 0.10{sub {minus}0.14}{sup +0.10} and uses this measurement to determine the absolute branching ratio of D{sub s}{sup +} {yields} {phi}{pi}{sup +} as B{tau}(D{sub s}{sup +} {yields} {phi}{pi}{sup +}) = (3.1 {plus minus} 0.6{sub {minus}0.6}{sup +0.9} {plus minus} 0.6)%.

• Research Organization: Purdue Univ., Lafayette, IN (United States)
• OSTI ID: 7235102
• Country of Publication: United States
• Language: English

Related Subjects

662350* -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
BRANCHING RATIO
CESR STORAGE RING
CHARM PARTICLES
CHARMED MESONS
D MESONS
D PLUS MESONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INTERACTIONS
MESONS
PARTICLE DECAY
PARTICLE PRODUCTION
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
QUARKS
SEMILEPTONIC DECAY
STORAGE RINGS
STRONG INTERACTIONS
VECTOR MESONS
WEAK PARTICLE DECAY