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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 nucleonshe pj* cw ;x2bx43swg), similar to Eq. 32-4, that could produce a 3c)g sxb ;jhw4 w2px*e$\pi^0$.
参考答案:    

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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 cab 8nlpu .3hp7z3+vs8w ; ckispeed, so that its kinetic energy is much greater than ici3 3 vkh8pb . +alzsp8wcu;7nts rest energy ($mc^2$), 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 of the antiparticles to the co9jcmk7 cm4qx :92fyxf a1lid(nstituents of normal atoms, consist of? What might happen if antimatter, made of such antiatoms, came in contact w4da 1c9cqmkfi 7 x :jy(9l2fmxith our normal world of matter?
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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 sig fs m7;)tmwj0 5ickbp/9o*p)mcgr2qd nals the electromagnetic interaction?
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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 partic wbjh 77e)q7 pkhbg5 /o*o0fqtle necessarily mean that the decay occurs via the weak interaction? Do all decays via the weak interaction produce 0k *)5qjo7htbf7eoq wh/pg 7ba 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 thopdm+9w2 l :ywbzd e p1j,eljwpi z*zcu 4*z4)1ugh the neutron and one of its decay products (proton) are strongly intpuez 1 w9wlez*mw1 4bi :,4+cz jj2 *yl)pdzpderacting?
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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, gravitational) doy(5+qx 7tqfvrtm z8+yes an electron t( m7qt 85yytxfqrvz ++ake part in? A 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 nut +w2 ojlmws/58lzb1umber are conserved in each of the decays in Tableb/w5ul st 1jlw2moz+8 32-2.
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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 the ele ;avxj**eqd. so xm:0vctromagnetic interac 0av*; o.qd*ves: xjxmtion?
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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 decays in Table 32-2 occur by t1ih ,wc:wark4: fs8v9 gdqbxx2cyo,8 he 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 why, does grt.-g:1jpqq $\Sigma^0$ 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 in Table 32-4 occur via the electromags5 n9x.vdpuf /netic interact.x /fdp nsv9u5ion?
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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 decayscea.t2qnz+3tr3j 2 q o in Table 32-4 occur by the 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" that was 1 ;bk3oh 9um qa wsn q zy1avaq1c.*eczc/3k60massless, had no color charge or electrical charge, and did not feel the weak forcewc 01ccma. u3*qoknhskqyz9;1 3bvzqa1/ ae6 . Could you say that this particle even exists?
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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 bemw5 54lq3fu;8cue wgf 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 chromodynamics, would it b pw*.vhbwuecvl5g7 3:e possible to find particles made up of two quarks a*.v7gl3 hwep v 5wu:bcnd no antiquarks? What about two quarks and two antiquarks?
参考答案:    

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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 w2vi68 la)l id;m zppx1atz; 8bhen they are inside the nucleu;i diz8mb ;zap12 8p)tvlx 6las?
参考答案:    

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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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