Лекции по основам кинематики элементарных процессов. Строковский Е.А. - 49 стр.

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P
a
P
b
P
c
P
d
u =(P
a
−P
d
)
2
=(P
b
−P
c
)
2
s + t + u = m
2
a
+ m
2
b
+ m
2
c
+ m
2
d
.
P
a
+ P
b
= P
c
+ P
d
.
s
P
b
P
c
t
P
b
P
a
P
c
P
d
u
a + b
1+2+3+... + n
(n 1)
(2+3+...+n) X M
2
eff
M
2
X
=(
n
i=2
P
i
)
2
X
t
m
a
= m
c
m
b
= m
d
t
ϑ
   I    0   C 1    Pa 0 Pb0 Pc0 Pd
   u = (Pa − Pd)2 = (Pb − Pc)2 O 2/    /  
        %             20    
 FA G C 7        5    ?
                s + t + u = m2a + m2b + m2c + m2d .         FAAG
     2  9 1                 1   /  
 0      0      5   / 
 7 21 ?
                       Pa + Pb = Pc + Pd .

     7 2       1    s
.    Pb 1 5  0  Pc      5       1 
 2       0 1    t  0  
    Pb 1     1 5   Pa 0     Pc      5  
1     Pd         1  2   
   0  1    u 2 1  1  
  0 1   56 2  /  B1 0  1  
    2 B        250   
         B    1     
  1       F   ”   ”   G0
         56    
   0         "         a + b →
1 + 2 + 3 + ... + n !        
  12345          (n − 1)
 !          
                                                    n       2
(2+3+...+n) ≡ X    " " Mef
                                        2
                                          f ≡ MX = ( i=2 Pi ) 3
                                               2

>        0   2      
         X  / B1  
    L  1        1     
  t0    12  50 2    FA G
ma = mc 0 mb = md  .     t    0 
          FA G F7   0  
  5   1    F  0 / 7 2G
1 12      0   5    1 
1   /   1  9 5  1 5 1 
  /G   16    0 2  7    0
    0   2    ϑ   F   2 
                               B*