Precision measurements of pion nucleon elastic scattering in the P3 energy region at LAMPF. 1984 progress report

Technical Report · Wed Feb 29 04:00:00 EST 1984

OSTI ID:5210920

Sadler, M E

This study is a continuation of the pion-nucleon program at the Los Alamos Meson Physics Facility. Previous measurements, in chronological order, have included differential cross sections for ..pi../sup +-/p elastic scattering at P/sub ..pi../ = 378 - 687 MeV/c (LAMPF experiment 363), ..pi../sup -/p charge exchange for P/sub ..pi../ = 247 - 687 MeV/c (LAMPF experiment 120), and measurements of the polarization asymmetry for ..pi../sup +-/p -> ..pi../sup +-/p and ..pi../sup -/p -> ..pi../sup 0/n for P/sub ..pi../ = 471 - 687 MeV/c (LAMPF experiments 120* and 120**, respectively). Two experiments were initiated in the past year, forward-angle differential cross sections for ..pi../sup -/p -> ..pi../sup 0/n at P/sub ..pi../ = 96 - 150 MeV/c (LAMPF experiment 809) and polarization asymmetry for ..pi../sup -/p - > ..gamma..n (LAMPF experiment 804). Approved experiments which will be scheduled in the future are spin rotation measurements for ..pi../sup +-/p -> ..pi../sup +-/p (LAMPF experiments 806 and 807) and differential cross sections for ..pi../sup -/p -> ..pi../sup 0/n near 0/sup 0/ and 180/sup 0/ at P/sub ..pi../ = 471-687 MeV/c (LAMPF experiment 849). Another experiment, differential cross section measurements for ..pi../sup +-/ elastic scattering on /sup 3/He and /sup 3/H (LAMPF experiment 546), has also been completed. The /sup 3/He and /sup 3/H targets form an isospin doublet analogous to the proton and neutron. The I/sub 3/ = -1/2 member (/sup 3/H) of the multiplet can be utilized as a target in this case, allowing a direct test of charge symmetry not achievable in the ..pi..N system due to the impossibility of a pure neutron target.

• Research Organization: Abilene Christian Univ., TX (USA)
• DOE Contract Number: AS05-81ER40036
• OSTI ID: 5210920
• Report Number(s): DOE/ER/40036-3; ON: DE84010037
• Country of Publication: United States
• Language: English

Related Subjects

645101 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
645104* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANALYZING POWER
BARYONS
BASIC INTERACTIONS
BOSONS
CAPTURE
CHARGE-EXCHANGE INTERACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
HELIUM 3 TARGET
INTERACTIONS
MESON REACTIONS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
MEV RANGE
MEV RANGE 100-1000
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PION MINUS REACTIONS
PION MINUS-PROTON INTERACTIONS
PION PLUS REACTIONS
PION PLUS-PROTON INTERACTIONS
PION REACTIONS
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
RESEARCH PROGRAMS
SCATTERING
STRONG INTERACTIONS
TARGETS
TRITIUM TARGET