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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 couldv 7vfhj ax6s04 produce a sj 6fh va4vx70$\pi^0$.
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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, sr9x - zrj3pbjbs*p f;;p59fx mo that its kinetic energy is much greatj;f b rm-r*p 3;pj9zxb5xspf9 er than its 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 coos(pviopt x)th3oavl+i y5/qw+*n6 . nstituents of normal atoms, consist of? What might happen if antimatter, made of such antiatoms, came in contact with our normal world ohvtoq)3+nypo.i6s w/ x t( po*5li+avf 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 .7at:zgevj j9the 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 p*v ( yyfi)psbrl fh;74roducts of a particle necessarily mean that the decay 7bfl 4pry;(yvsif* )hoccurs via the weak interaction? Do 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 the weak interaction even though the neutroinig0ik f+ 3;en and one of its decay products (proton) are strongly inte03fi+ e;g inikracting?
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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 interacyo5bazdf2iq ywy z/+s 4)jn 0*tions (strong, electromagnetic, weak, gravitational) does an electron take part in? A neutri jf+2byw ayo) zny *qzd/405isno? 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 a 6u)b 6vqvx hzx6fqv/xr z1r*,re conserved in each of the decays in Table 3xv1,6f qv uz6b6v xzxrq rh*)/2-2.
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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 dec)tv01k tzb+p 3ld84crsa jjbr5,d+ wcays in Table 32-2 occur via the electromagnetic interactionls31a v)4,d z0dr5jwktb++8tcj cp br?
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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-dnh,h 6uvq 63u2 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, anh; qs8vfkl*4 wd 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 in Table 32-4 occur via 2*wkb)0x t -..swpzm7faf fw cthe electromagnetic interactio.tws0c. affx -72w*)w bkzpmfn?
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14#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
Which of the particlueemnl joj i.g +-*i c(+y.g k(r*uhp8e decays 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 massless, had no uz*o+l/a+ei /ft8xg2aguj 9c color charge or electrical charge, and dj*utzia/x l/ e8a+ gu+o2f9cgid not feel the weak force. 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 partiofa (g)xme8ejv5 + zj3cle 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 chromodynamics, would it be possible to find partic*ze -+og7)rq,do ceqx les made up of two quarks and no antiquarks? What abouc -doeq)z+eqo* xg 7r,t 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 fre7 ntht1kq3,. muje ;m6gas am5e but not when they are inside the nucleumjs, .n76gettk3 u1a5m am;qhs?
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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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