PRECISION-MEASUREMENTS OF ANTIPROTON-PROTON FORWARD ELASTIC-SCATTERING PARAMETERS IN THE 3.7 TO 6.2 GEV C REGION/

Authors
ARMSTRONG TA BETTONI D BHARADWAJ V BIINO C BLANFORD G BORREANI G BROEMMELSIEK D BUZZO A CALABRESE R CECCUCCI A CESTER R CHURCH M DALPIAZ P DALPIAZ PF DIBENEDETTO R DIMITROYANNIS D FABBRI M FAST J GIANOLI A GINSBURG CM GOLLWITZER K GOVI G HAHN A HASAN MA HSUEH S LEWIS R LUPPI E MACRI M MAJEWSKA AM MANDELKERN M MARCHETTO F MARINELLI M MARQUES J MARSH W MARTINI M MASUZAWA M MENICHETTI E MIGLIORI A MUSSA R PALESTINI S PALLAVICINI M PASSAGIO S PASTRONE N PATRIGNANI C PEDLAR TK PEOPLES J PESANDO L PETRUCCI F PIA MG PORDES S RAPIDIS PA RAY R REID J RINAUDO G ROBUTTI E ROCCUZZO B ROSEN J SANTRONI A SARMIENTO M SAVRIE M SCHULTZ J SETH KK SMITH A SMITH GA SOZZI M TROKENHEIM S WEBER MF WERKEMA S ZHANG Y ZHAO J ZIOULAS G
Citation
Ta. Armstrong et al., PRECISION-MEASUREMENTS OF ANTIPROTON-PROTON FORWARD ELASTIC-SCATTERING PARAMETERS IN THE 3.7 TO 6.2 GEV C REGION/, Physics letters. Section B, 385(1-4), 1996, pp. 479-486
Citations number
9
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
385
Issue
1-4
Year of publication
1996
Pages
479 - 486
Database
ISI
SICI code
0370-2693(1996)385:1-4<479:POAFE>2.0.ZU;2-1
Abstract
Differential cross sections for <(p)over bar p> elastic scattering hav e been measured for very small momentum transfers at six different inc ident antiproton momenta in the range 3.7 to 6.2 GeV/c by the detectio n of recoil protons at scattering angles close to 90 degrees. Forward scattering parameters sigma(T), b, and rho have been determined. For t he rho-parameter, up to an order of magnitude higher level of precisio n has been achieved compared to that in earlier experiments. It is fou nd that existing dispersion theory predictions are in disagreement wit h our results for the rho-parameter.