FIZIKA B 8 (1999) 1, 113-116

PION ABSORPTION IN ⁴He

M. PLANINIĆ^h, D. ANDROIĆ^h, G. BACKENSTOSS^a, D. BOSNAR^h, T. DOOLING^f, M. FURIĆ^h, P. A. M. GRAM^c, N. K. GREGORY^d, A. HOFFART^b,g, C. H. Q. INGRAM^g, A. KLEIN^f, K. KOCH^g, J. KÖHLER^a, B. KOTLINSKI^g, M. KROEDEL^a, G. KYLE^e, A. LEHMANN^a,g, A. O. MATEOS^d, K. MICHAELIAN^g, T. PETKOVIĆ^h, R. P. REDWINE^d, D. ROWNTREE^d, N.ŠIMIČEVIĆ^d, R. TREZECIAK^b, H. ULLRICH^b, H. J. WEYER^a,g, M. WILDI^a and K. E. WILSON^d

(LADS collaboration)
^aUniversity of Basel, CH-4056 Basel, Switzerland
^bUniversity of Karlsruhe, D-7500 Karlsruhe, Germany
^cLAMPF, Los Alamos NM 87545, U. S. A.
^cMassachusetts Institute of Technology, Cambridge, MA 02139, U. S. A.
^eNew Mexico State University, Las Cruces, NM 88003, U. S. A.
^fOld Dominion University, Norfolk, VA 23529, U. S. A.
^gPaul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
^h University of Zagreb, HR-10000 Zagreb, Croatia

Received 3 February 1999; Accepted 7 June 1999

This paper presents a large solid angle measurement of the positive pion absorption cross section on ⁴He and its decomposition into partial channels. A large fraction of the absorption cross section at incident pion kinetic energies of T_p⁺ =70, 118, 162, 239, and 330 MeV is due to multinucleon channels.

PACS numbers: 25.80.Hp, 25.10.+s
UDC 539.126

Keywords: positive pion absorption in ⁴He, cross sections of partial channels, multinucleon channels: (pp)d/pn, (pn)pp, (pd)p, (ppp)n, (ppn)p, (ppd), (pppn)

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