Real Parts of the Pion-Proton Forward Scattering Amplitude

Phys.Rev.D 16 (1977) 2891, 1977.

Abstract (data abstract)
THE FOLLOWING COMMENTS ARE TAKEN FROM THE PI N COMPILATION OF R.L. KELLY. THEY ARE THAT COMPILATION& apos;S COMPLETE SET OF COMMENTS FOR PAPERS RELATED TO THE SAME EXPERIMENT (DESIGNATED HENDRICK77) AS THE CURRENT PAPER. (THE IDENTIFIER PRECEDING THE REFERENCE AND COMMENT FOR EACH PAPER IS FOR CROSS-REFERENCING WITHIN THESE COMMENTS ONLY AND DOES NOT NECESSARILY AGREE WITH THE SHORT CODE USED ELSEWHERE IN THE PRESENT COMPILATION.) /// HENDRICK77 [R. E. HENDRICK,PRIV. COMM.,1977.] -- REAL PARTS OF FORWARD PI+ P AND PI- P AMPLITUDES CALULATED WITH DISPERSION RELATIONS. THESE HAVE BEEN COMBINED WITH THE TOTAL CROSS SECTION DATA OF CARTER68 (464-2665 MEV/C) AND CARTER71 (158-406 MEV/C) TO CONSTRUCT THE FORWARD DIFFERENTIAL CROSS SECTION DATA RECORDED HERE. REAL AND IMAGINARY PARTS OF FORWARD CROSSING ODD AMPLITUDES HAVE ALSO BEEN USED TO CONSTRUCT FORWARD PI- P CEX DCS DATA AT 40 MEV/C INTERVALS. THIS RATHER WIDE SPACING IS CHOSEN BECAUSE OF MOMENTUM DEPENDENT CORRELATIONS IN THESE AMPLITUDES. /// ENGELMAN77 [T. R. ENGELMANN,CARNEGIE-MELLON U. PPT. COO-3066-89,1977.] -- DESCRIPTION OF FORWARD REAL PART CALCULATIONS WITH ABBREVIATED TABLE OF RESULTS. /// ENGELMA77B [T. R. ENGELMANN,PRD 16,2891(1977)] -- PUBLICATION OF ENGELMAN77 (REVISED). /// KELLY79 [R. L. KELLY,1979.] -- CALCULATION OF FORWARD PI+ P AND PI- P ELASTIC DCS BETWEEN 2150 AND 5000 MEV/C USING HENDRICK77 REAL PARTS AND IMAGINARY PARTS. IMAGINARY PART ERRORS AND APPROPRIATE MOMENTUM SPACING (50 MEV/C BELOW 3 GEV/C,100 MEV/C ABOVE) ESTIMATED FROM TOTAL CROSS SECTION MEASUREMENTS IN THIS REGION. WHERE THEY OVERLAP,THESE FORWARD DCS DATA ARE REDUNDANT WITH THOSE OF HENDRICK77.