Neutral strange particle production in high energy charged current neutrino deuterium interactions

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1982

OSTI ID:5072498

Son, D

In an exposure of the Fermilab 15-foot deuterium filled bubble chamber to a single horn focused wide band neutrino beam with energies between 10 and 250 GeV, 311 K/sub s/, 219 lambda and 7 Anti lambda are observed. These correspond to K/sup 0/anti(K/sup 0/), lambda(..sigma../sup 0/) and anti lambda production rates per charged current interaction of 0.170 +/- 0.010, 0.060 +/- 0.004, and 0.002 +/- 0.001, respectively, in 18.9 +/- 0.09% V/sup 0/ events of total charged current events. The inclusive lambda rate in nun interactions is significantly higher than that in nup interactions. The multiplicity of K/sup 0/ increases (or decreases) with increasing E/sub nu/, W, and Q/sup 2/ (or x/sub BETA), while that of lambda shows no significant variations. From a detailed study of lambda, lambda K/sup 0/), lambda K/sup *//sup +0/ systems, the production rate of lambda from the charm quark decay is found to be (2.1 +/- 1.0)% of the total charged current, which leads to a small cross section for charmed baryon quasielastic production < 5 X 10/sup -40/ cm/sup 2/ (90% CL) and a small semileptonic branching ratio of lambda/sub c/ + decay, B(lambda/sub c/ + ..-->.. e + lambda x <6%(95%CL). The lambda ..pi../sup +/, K/sup 0/p, lambda ..pi../sup +/..pi../sup +/..pi../sup -/, and antiK/sup 0/p..pi../sup +/..pi../sup -/ decay modes of lambda/sub c//sup +/ are studied and found consistent with our previous results. The gross probability that an (ss) pair is produced in lambda S = 0 neutrino reactions is estimated to be 0.19 +/- 0.06, which agrees well with that in hadronic experiments. The inclusive x/sub F/ and p/sub T/sup 2// distributions and their average values are very similar to those in hadronic experiments, which suggest that the majority of neutral strange particles are produced in neutrino reactions via the associated production mechanism.

• Research Organization: Maryland Univ., College Park (USA)
• OSTI ID: 5072498
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Weak Interactions &amp; Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON RESONANCES
BARYONS
BOSONS
BRANCHING RATIO
CHARGED-CURRENT INTERACTIONS
CHARM PARTICLES
CHARMED BARYON RESONANCES
CROSS SECTIONS
CYCLIC ACCELERATORS
DATA
DECAY
DEUTERIUM TARGET
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMILAB ACCELERATOR
FERMIONS
GEV RANGE
GEV RANGE 10-100
GEV RANGE 100-1000
HADRONS
INFORMATION
INTERACTIONS
KAONS
KAONS NEUTRAL
KAONS NEUTRAL SHORT-LIVED
LAMBDA-2250 RESONANCES
LEPTON REACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
MESONS
MULTIPLICITY
NEUTRINO REACTIONS
NEUTRINO-DEUTERON INTERACTIONS
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
POSTULATED PARTICLES
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
STRANGE PARTICLES
SYNCHROTRONS
TARGETS