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习题练习:Elementary Particles

 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 produ ey9 3yi:3h6lei1gbaf55vhd vce a 6:hgaviv e3 bh dyy91ie5l5f3$\pi^0$.
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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 higeq2 z3 hoe(zj1h speed, so that its kinetic energy is much greater than its rest zoj32zeh(e1q 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," madgj4 p(m,s k )6bmn3lzjh/d+vie up of the antiparticles to the constituents of normal atoms, consist of? What might happen if antimatter, madp z3,(m lnjj)mb+ 6hv/kds g4ie of such antiatoms, came in contact with 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 signals the electrom nnah 5;;dwiwb*p9, vprz j8/fagnetic 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 g:a7gzb.5) zgn8 a tepneutrino among the decay products of a particle necessarily mean that the decay occurs via the weak interaction? D 5pz.7b : gtae8ggz)nao all decays via the weak interaction produce 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 thf)hsed 8we;,:7c*d, kddsqgne weak interaction even though the neutron ang:qdc*kn,,e h)dss7d e8fw ;dd one of its decay products (proton) 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, gr a)zhd ms:y*(bavitational) does an ele(:dhs)za*by mctron take 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 number are con*njxm// ukkk0 n :+rjnserved in each of the decays in Table 32- *nujn kkx+nmkr:/ 0/j2.
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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 3:cxvw e q (x, ,)kzj jh1;(nqcozu:bxdecays in Table 32-2 occur via the electromagnetic interactiz:uc(:bz; (q,we,j)3kvxnhqc xx 1 ojon?
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10#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particlemad13un42 1/la jta in0bnc w+xd i(1u decays 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 whyw)- ) pzvn8ubacus4)mm s:w2s, 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 in Table 32-4 occur via the electromagnetic interacys 1 zkqm 6oszmf1 bexi4lw*.v13 l6n+tsmswo m4ie f1qlxk1 3zzv b.ny*61l6 +ion?
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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 the weak int2e;whv ,ss xpqvclq )19(m f9eeraction?
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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 massless, had no color c:7ft:tj0qzo1z -j jycharge or electrical charge, and did not feel the weak force. Could you say that thjf::1zj o zct-7jtyq 0is 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 py3zd b,;c4euoek.)dzarticle to be 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 chromodynam* :3e /gkcs q:ixmu4xoics, would it be possible to find particles made up of two quarks and no antiquarks? What about t3ui qokxx*mcs::e4g/wo 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 n may-m 7lvv ab,pptihwtdes8c 80849)ot when they are inside the nucleusvwp ldb,ytv) e ama0c89ip7-t8s 4 m8h?
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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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总分:21分 及格:12.6分 时间:不限时
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