Precise measurement of D[sup 0], D[sup +-] and D[sup +-][sub s] meson lifetimes

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1993

OSTI ID:6909539

Puseljic, D L

The measurement of the D[sup 0], D[sup +-] and D[sup +-][sub s] meson lifetimes are described. The D[sup 0] meson has been observed through its decay into K[sup [minus]+][pi][sup +-] and K[sup [minus]+][pi][sup +-][pi][sup [minus]+][pi][sup +-], the D[sup +-] meson through its decay into K[sup [minus]+][pi][sup +-][pi][sup +-], and the D[sup +-][sub s] meson through its decay into [phi][sup 0][pi][sup +-]. The data sample was obtained in a high energy photoproduction experiment E-687 at the Fermilab Wide Band Laboratory during the 1990-91 fixed target running period with a mean tagged photon energy of 220 GeV. The final lifetime samples consisted of [approx]17 500 D[sup 0], [approx]11 500 D[sup +-], and [approx]900 D[sup +-][sub s] fully reconstructed decays. The lifetimes were obtained by time distributions. The measured lifetimes of the D[sup 0], D[sup +-] and D[sup +-][sub s] are 0.4200 [+-] 0.0045 [+-] 0.0030, 1.042 [+-] 0.015 [+-] 0.011, and 0.475 [+-] 0.020 [+-] 0.007 picoseconds respectively. (The first error is statistical error while the second is systematic error).

• Research Organization: Notre Dame Univ., IN (United States)
• OSTI ID: 6909539
• Country of Publication: United States
• Language: English

Related Subjects

662350 -- Decays of Mesons-- (1992-)
662420* -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
CHARM PARTICLES
CHARMED MESONS
D MESONS
D MINUS MESONS
D NEUTRAL MESONS
D PLUS MESONS
DATA
DECAY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
HADRONIC PARTICLE DECAY
HADRONS
INFORMATION
INTERACTIONS
LIFETIME
MESONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTOPRODUCTION
PSEUDOSCALAR MESONS
STATISTICAL DATA