Total and partial pion absorption cross sections on {sup 4}He in the {Delta} resonance region

Journal Article · Sat Aug 01 04:00:00 EDT 1998 · Physical Review, C

OSTI ID:639190

Backenstoss, G; Koehler, J; Kroedel, M; Lehmann, A; Weyer, H J; Wildi, M ^[1]; Hoffart, A; Trezeciak, R; Ullrich, H ^[2]; Gram, P A ^[3]; Breuer, H ^[4]; Mateos, A O; Gregory, N K; Redwine, R P; Rowntree, D; Simicevic, N; Wilson, K E ^[5]; Kyle, G; Wang, M; Wang, M H ^[6] ; Dooling, T; Klein, A ^[7]; Doebbeling, H; Hoffart, A; Ingram, Q; Koch, K; Kotlinski, B; Lehmann, A; Michaelian, K; Sennhauser, U ^[8]; Androic, D; Bosnar, D; Furic, M; Petkovic, T; Planinic, M ^[9]

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1. University of Basel, CH-4056 Basel (Switzerland)
2. University of Karlsruhe, D-76128 Karlsruhe (Germany)
3. LAMPF, Los Alamos, New Mexico 87545 (United States)
4. University of Maryland, College Park, Maryland 20742 (United States)
5. Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
6. New Mexico State University, Las Cruces, New Mexico 88003 (United States)
7. Old Dominion University, Norfolk, Virginia 23529 (United States)
8. Paul Scherrer Institute, CH-5232 Villigen PSI (Switzerland)
9. University of Zagreb, HR-10000 Zagreb (Croatia)

This paper presents a large solid angle measurement of the positive pion absorption cross section on {sup 4}He and its decomposition into partial channels. The total absorption cross sections at incident pion kinetic energies of T{sub {pi}{sup +}}=70, 118, 162, and 239 MeV are 35{plus_minus}5, 52{plus_minus}4, 51{plus_minus}5, and 27{plus_minus}2 mb, respectively. These values are lower than those reported in some previous experiments. At all pion energies a large fraction of the absorption cross section is due to multinucleon channels. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 639190
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 2 Vol. 58; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ABSORPTION
DECOMPOSITION
DELTA BARYONS
HELIUM 4 TARGET
KINETIC ENERGY
PION REACTIONS
TOTAL CROSS SECTIONS