Measurement of the total and differential cross sections for the reaction π − p → ηn with the Crystal Ball detector

N Kozlenko ,I I Strakovsky,N Phaisangittisakul,B M K Nefkens,I Supek,M Clajus,S P Kruglov,W B Tippens,Z Papandreou,W J Briscoe,A Gibson,D Grosnic,D Isenhower,J Huddleston,R Manweiler,J Olmsted,A Shafi,V V Abaev,D M Manley,S Stanislaus,I Šlaus ,A F Ramirez ,S Mcdonald ,A Koulbardis ,N S Knecht ,D D Koetke ,A Marušić ,A Starostin ,S Hayden ,V Bekrenev ,B.l Draper ,K Craig ,H M Staudenmaier ,T F Kycia ,H Spinka ,C Allgower ,S Prakhov ,D C Peaslee ,J.r Comfort ,G J Lolos ,R V Cadman ,Clark S Robinson ,M E Sadler ,J Peterson ,J W Price ,I Lopatin

doi:10.1134/1.1540664

Abstract

The first results obtained in 1998 by the Crystal Ball collaboration from a measurement of the total and differential cross sections for the reaction π − p → ηn are presented. These new experimental results for the total cross sections are compared with the predictions of the K-matrix model for pion-nucleon scattering. The angular distribution at momenta near the reaction threshold (685 MeV/c) is determined by the S-wave contribution. The P-wave contribution begins to manifest itself from a momentum of 720 MeV/c.

Full Text