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Angular distribution measurement of the reaction αp →3He d at 3.98 GeV/c

1977; Springer Science+Business Media; Volume: 19; Issue: 8 Linguagem: Inglês

10.1007/bf02746837

1827-613X

Jean-Philippe Berger, J. Duflo, L. Goldzahl, F. Plouin, G. Bizard, C. Le Brun, J. Oostens, Maxime Van den Bossche, Liu Hai, L. Fabbri, P. Picozza, L. Satta, A. Boudard, Y. Terrien,

Advanced NMR Techniques and Applications

R e a c t i o n s i n v o l v i n g t h e t r a n s f e r of one nuc leon be tween l i gh t nucle i a t m e d i u m e n e r g y h a v e b e e n sa id to be a choice t e s t i n g g r o u n d to obse rve t h e p resence of J~* in nuc le i (1,2). T h e s imp les t of such r eac t ions , p + d = d b p , h a s a l r e a d y been s tud ied , a n d t h e r e s u l t s can be i n t e r p r e t e d b y m e a n s of a J~* c o m p o n e n t in t he d e u t e r o n (2). Such a h y p o t h e s i s could be conf i rmed b y t h e s t u d y of d + d = aHe-~n a n d p + a H e = = d + 3 H e . Those two r eac t i ons a re p a r t of a p r o g r a m in p rogress a t S a t u r n e to inves t iga te nuc l eon e x c h a n g e processes . I n t h i s p a p e r we wil l p r e s e n t t h e r e su l t conce rn ing 4 H e + p = 3 H e + d a t 3.98 GeV/e. F o r t h i s p a r t i c u l a r i n c i d e n t energy , and in t h e d o m a i n of m o m e n t u m t r a n s f e r u n d e r i n v e s t i g a t i o n , i t is n o t poss ible to d r a w i n f o r m a t i o n a b o u t t he p re sence of zV*. W e do t h i n k , howeve r , t h a t i t is n e c e s s a r y to h a v e d a t a a t al l energies s ince one ha s to be ab le to g ive good accoun t of t h e o n e n e u t r o n t r a n s f e r r e a c t i o n a t t h e energ ies w h e r e J~* r e sonances do n o t p l a y a role i f one w a n t s to e x t r a c t i n fo rmat ion a b o u t 2i '* in nuc le i f r om t h e s ame r eac t ion done a t h i g h e r energies a n d l l igher