Лекции по основам кинематики элементарных процессов. Строковский Е.А. - 54 стр.

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pp
pp p +Λ+K
+
3
M
Y
m
i
i =1, ...
t
pp
=
M
p
M
p
+ M
Y
+
m
i
·
M
Y
+
m
i
2
M
2
p
,
t
pmesons
= M
2
p
·
1
m
i
M
p
1+
M
Y
M
p

,
t
pY
= M
2
p
·
1
M
Y
M
p
1+
m
i
M
p

,
t
pa
a = p,Y, meson
a
1
2 2
pp
(2M + M
X
)
2
s
pp
< (2M + M
X
+ m
π
)
2
.
pA
4M
2
1+
M
X
2M
·
1+
M
X
2M
targ
˜s
pp
< (2M + M
X
)
2
.
s
thresh
pp
˜s
thresh
pp
=2M · M
X
·
1+
M
X
2M
·
1
M
M
targ
.
         C  pp     
F  211   G    F5      
 1 pp → p + Λ + K + G0     3 FG
   MY 0     F G    mi 0 i = 1, ... I2  C
  0  
                                         2         
    tp→p    =−
                      Mp
                          
               M p + M Y + mi
                                · MY +              2
                                            mi − M p ,            FA"EG
                                              
                            2
              tp→mesons = Mp · 1 −
                                      mi
                                     Mp
                                          1+
                                             MY
                                              Mp
                                                    ,             FA"+G
                                          
                tp→Y = Mp2 · 1 −
                                 MY
                                  Mp
                                       1+
                                            mi
                                           Mp
                                                  ,      FA",G
2 tp→a 0 Fa = p , Y, mesonG      1  2  C  
      a B1  F C  AAG
   ;  FA"BGFA",G  0     ” C ” C  
 0  9 F1   5G 1   B1  8  
  0   1  1   9 ∼ 1 372U:2  /
       /     /  1     
7   /   I        12  
         / 7 2 F@ 0
        0   9/  1 % 92
 2 $   FfXYG0    2 12  
 J22 F    6   G ;   0   /
 / F1   19 2 G 7 2   C   1
2 0  1 12       G
   8   ”   12”   pp  ?
                         2                      2
             (2M + MX ) ≤ spp < (2M + MX + mπ ) .        FA"*G
   ”. 12 ”       pA   F  A G
     C  2   0      9 
/    2 F      A G   
 2 F1 0 1   2   1 2  2
 12/      A G?
                       
       2
   4M 1 +
          MX
          2M
              · 1+
                    MX
                   2Mtarg
                                               2
                            ≤ s̃pp < (2M + MX ) .                 FA !G
   V ”1 12 ”   ?
                                                         
  sthresh
   pp       −   s̃ppthresh   = 2M · MX · 1 +
                                             MX
                                             2M
                                                 · 1−
                                                       M
                                                      Mtarg
                                                              .   FA "G
                                        -B