Question

4) Which decays are possible? If forbidden, cite the conservation law that's violated: a. " + pt →n+ n° b. 1+ +p+ →n+ C. + + pt → pt + ēt d. pt → et + ve e ut et + 4 f. pt →n+ e* + ve

Answer 1

@ n + mo 11 0 + 1 = 1+o X + pt Charge :'(-1) + (43) 55 (0) +(0) ..conserved Baryon Number : : conserved Isospin , I3 1+ 4 .+0 : Conserved Strangeness GS - This decay is possible 12 o tro - 70+ 0 Conserved • (b) + + P 3 n + T o Charge (+1) + (+1). of o ; Not consewed Baryon Meriber, B 0+1+1+o i conserved · Scoubin , Ig : +1+19-410 : not conserved This decay is not possible. It is SUNDAY 03 forbidden because charge and third component of isoisin is not conserved

ptt et 9 Bary on : ܘ ܘ +1 + 2 12 and (C) A++ pt. Charge : + 1 + 1 1+1 : conserved on Aluniber 0+1 10 : Coriserved Lepton reumber 0 + 0 +0+(-1) : not conserved 11 si ospin, Iz 1 to Meet conserved This decay is forbidden Lepton number isoskin , Iz is not conserved (d) pt ēt + Ve Charge : +1 9 + 1 to è conserved 3 Lektori Number : o -1+ 1 : Conserved Baryon number 1.9 of o : not conserved Isospin + z 0+ 0 Mot conserved This decay is forbidden as Baryou rlamber and third component of isospin is not conserved. 2 Home 4 o oo 5 6 (e) ut → et + a tu Charge +1+1+o : conserved Lepton number : -1 5-1 +(-1) : Not conserved