Evidence against broad dibaryons

Journal Article · Mon Mar 07 00:00:00 EST 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.60.901· OSTI ID:5235520

Shypit, R L; Bugg, D V; Lee, D M; McNaughton, M W; Silbar, R R; Stewart, N M; Clough, A S; Hollas, C L; McNaughton, K H; Riley, P

Spin-correlation parameters A/sub L//sub L/, A/sub S//sub L/, A/sub N//sub L/, A/sub N//sub 0/, A/sub S//sub 0/, A/sub L//sub 0/, and A/sub 0//sub L/ have been measured for the reaction pp..-->..np..pi../sup +/ at 492, 576, 643, 729, and 796 MeV. An isobar analysis determines magnitudes and phases of partial waves up to NN /sup 3/F/sub 3/. For the amplitude NN(/sup 1/D/sub 2/)..-->..N..delta..(/sup 5/S/sub 2/), the phase shows a strong threshold enhancement in the N..delta.. channel, dropping from 44.4/sup 0/ +- 4.4/sup 0/ at 492 MeV to 11.9/sup 0/ +- 1.9/sup 0/ at 796 MeV. Other phases show little activity. Broad dibaryons are conclusively ruled out in /sup 1/D/sub 2/, /sup 3/F/sub 3/, and /sup 3/P/sub 2/ in this energy range

• Research Organization: Queen Mary College, London E1)vertreverse arrowbar)4NS, United Kingdom
• OSTI ID: 5235520
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 60:10; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BARYON-BARYON INTERACTIONS
BARYONS
BOSONS
COINCIDENCE SPECTROMETRY
DIBARYONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
LAMPF LINAC
LINEAR ACCELERATORS
MAGNETIC RESONANCE
MEASURING INSTRUMENTS
MESON FACTORIES
MESONS
MEV RANGE
MEV RANGE 100-1000
MULTIWIRE PROPORTIONAL CHAMBERS
NEUTRONS
NUCLEAR MAGNETIC RESONANCE
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PARTIAL WAVES
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PIONS
PIONS PLUS
PROPORTIONAL COUNTERS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
PROTONS
PSEUDOSCALAR MESONS
RADIATION DETECTORS
RESONANCE
SPIN