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习题练习：Elementary Particles
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 作者: 王信东Wood  发布日期: 2025-10-07 21:48    总分: 21分  得分: _____________

答题人: 游客未登录  开始时间: 10月07日 21:48  切换到: 整卷模式

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1#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Give a reaction between two nucleons, similar to Eq. 32-4, that could produce a.xx; wmi pn8c3 8 .pnx3m;ix cw$\pi^0$.
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2#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a proton is moving at very high speed, so that its kinetic energy is mucq)8ixd0ix fa)b 4p-l- hz4c bmh greater than its rest ener b b 4ml0-)qf xcdhix4pza)8i-gy ($mc^2$), can it then decay via $p \to n + \pi^+$?   

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3#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
What would an "antiatom," made up ofypiyb* yi 8q yb4zs8 mccp8b2/917 sep the antiparticles to the constituents of normal atoms, consist of? What might happen if antimatter / yze878i2pb8 yqcbmicpy4s py*s1b9, made of such antiatoms, came in contact with our normal world of matter?
参考答案:    

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4#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
What particle in a decay signals the electromagnetic interactiom f+( 9qjp6pzsn?
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5#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Does the presence of a neutrino among the decay products of a particle nhqsu .nu8bi.c+i-l6 u ecessarily mean that the decay occurs via the weak interaction? Do all decays via the weak interaction producel6h8. b.+uqi u-ncius a neutrino? Explain.
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6#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Why is it that a neutron decays via the weak interaction even though tj4 v26urie,zei4fn+q1 zy*rdhe neutron and one of its decay products (proton) q14f zi+6yvrn 2iude4rj*z,e are strongly interacting?
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7#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the four interactions (strong, electromagnetic, weak, gravitatio26 5tdwx grs(anal) does an electron take part in? A2t6 awgds5(xr neutrino? A proton?
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8#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Check that charge and baryon number are conx4 *coedaz nvu/.37t oserved in each of the decays in Table .aoc d7n*o4 t/e3vzx u32-2.
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9#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particle decays in Table 32-2 occur via th;db4o3lnkbqtqa,u*viz u j)-lv ) p)9e electromagnetic interactpjbk3)q i ad4 ,)t)luuv9nq b-v* zl;oion?
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10#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particle decaysssj6+or7/pf*z 1 d xsb.tt4yz 9r3qak in Table 32-2 occur by the weak interaction?
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11#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
By what interaction, and c;-(qvuc zqs4 why, does $\Sigma^0$ decay to $\Lambda^0 + \gamma$? What about $\Xi^-$ decaying to $\Lambda^0 + \pi^-$?
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12#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
The $\Delta$ baryon has spin $\frac{3}{2}$, baryon number 1, and charge states $Q = +2, +1, 0, -1$. Why is there no charge state $Q = -2$?
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13#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particle decays ;9 mhi1 3aieg zpwez)ya+xb )0in Table 32-4 occur via the electromagnetic interactay9h ;ie)xz)z1i mbaw0g+p3eion?
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14#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particle decays in Table 32-4 occur by tdjcbkw31rxg,)*iv j /6nlp.y/ q b+r 0ms6 chphe weak interaction?
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15#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Quarks have spin $\frac{1}{2}$. How do you account for the fact that baryons have spin $\frac{1}{2}$ or $\frac{3}{2}$, and mesons have spin 0 or 1?
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16#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Suppose there were a kind of "neutrinolet" ;jwbivyvs,4*5lk u-4bw5g eethat was massless, had no color charge or electrical charge, and did not feel the weak force. Could you say that this particle even exb-jwwesvl b54ei;* v ygu5,k4ists?
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17#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Is it possible for a particle to q9n0(ram x 2r8 jsvc-qbe both
(a) a lepton and a baryon?
(b) a baryon and a hadron?  
(c) a meson and a quark?  
(d) a hadron and a lepton?   
Explain.

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18#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Using the ideas of quantum chromodynami,0z3;l; v w7ysjoxxvp(urci6 v 8as 4kcs, would it be possible to find particles made up of two quarks and no antiquarks? What a(;iavp;js3rszv4 okw 0lu7x, 8v6xcybout two quarks and two antiquarks?
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19#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Why do neutrons decay when they are free but not whpg+ 1s zjmicn7p( :-sjg 9kgz2en they are inside the nucleus?-gp2zngsgks+p(m zc 9ij 7: j1
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20#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Is the reaction $e^- + p \to n + \nu_e$ possible? Explain.   

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21#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Occasionally, the $\pi^+$ will decay by the following reaction: $\pi^+ \to e^+ + \nu_e$. Which of the four forces in nature is responsible for this decay? How do you know?
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