pi+- p differential cross sections at low energies

Journal Article · Sat Dec 03 00:00:00 EST 2005

OSTI ID:862053

Denz, H; Amaudruz, P; Brack, J T; Breitschopf, J; Camerini, P; Clark, J L; Clement, H; Felawka, L; Fragiacomo, E; Gibson, E F; Grion, N; Hofman, G J; Jamieson, B; Mathie, E L; Meier, R; Moloney, G; Ottewell, D; Patarakin, O; Patterson, J D; Pavan, M M ; Piano, S; Raywood, K; Ristinen, R A; Rui, R; Sevior, M E; Smith, G R; Stahov, J; Tacik, R; Wagner, G J; Wrochem, F von; Yeomans, D M

Differential cross sections for pi- p and pi+ p elastic scattering were measured at five energies between 19.9 and 43.3 MeV. The use of the CHAOS magnetic spectrometer at TRIUMF, supplemented by a range telescope for muon background suppression, provided simultaneous coverage of a large part of the full angular range, thus allowing very precise relative cross section measurements. The absolute normalization was determined with a typical accuracy of 5 %. This was verified in a simultaneous measurement of muon proton elastic scattering. The measured cross sections show some deviations from phase shift analysis predictions, in particular at large angles and low energies. From the new data we determine the real part of the isospin forward scattering amplitude.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE - Office of Energy Research (ER)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 862053
• Report Number(s): JLAB-PHY-05-455; DOE/ER/40150-3665; nucl-ex/0512006; 6447759; TRN: US0600108
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ISOSPIN
MAGNETIC SPECTROMETERS
MUONS
PHASE SHIFT
PROTONS
SCATTERING AMPLITUDES
TELESCOPES