QUANTITATIVE EVIDENCE OF ONE-PION EXCHANGE EFFECTS IN p-p SCATTERING

Journal Article · Tue Nov 15 04:00:00 EST 1960 · Phys. Rev. Letters

DOI:https://doi.org/10.1103/PhysRevLett.5.474· OSTI ID:4106613

Signell, P S

ABS>A further analysis was made of the data reported by Morovcsik, et al., concerning phase-shifts in 310-Mev p-p scattering, because it was felt that the significance of those results was considerably marred by the appearance of two strikingly different low angular-momentum phase-shift sets. Both of the sets have approximately the same behavior under variations of the theoretical coupling constart. The coupling constant was fixed at g/sup 2/ = 12.0, and 9-parameter searches were conducted. The "goodness-of-fit" parameter X/sup 2/ values are given as a function of virtual quantum mass for the Harvand 95-Mev data and for sets l and 2 of MacGregor et al. data at 3I0 Mev. The 95-Mev minimum is a plus or minus 125-Mev quantum mass, and the pion mass is plus or minus l35 Mev. The two solutions at 3I0 Mev exhibit an exceedingly poor behavior under quantum mass variations; the curves . are far from parabolic and the minima are far from the physical value. It is concluded that: (a) the 95-Mev Harvard p-p scattering data sharply exclude the numerical values of the theoretical coupling constant and virtual quartum mass from being very different from corresponding values for the real pion, thus providing quantitative evidence of the one-pion exchange force used by MacGregor, et al.; and (b) conclusions previously deduced from the 310- Mev data are made uncertain, probably basically from the lack of good enough data. (B.O.G.)

• Research Organization: Pennsylvania State Univ., University Park
• NSA Number: NSA-15-006674
• OSTI ID: 4106613
• Journal Information: Phys. Rev. Letters, Journal Name: Phys. Rev. Letters Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COUPLING CONSTANTS
ENERGY RANGE
INTERACTIONS
MASS
OPE MODEL
PARTICLE MODELS
PHASE SHIFT
PHYSICS
PIONS
PROTONS
QUANTUM MECHANICS
SCATTERING